I’ve been spending more time looking at tax deed and foreclosure auctions, and one thing that always worries me is making sure I’m not missing something during due diligence.
Before bidding on a property, I usually try to check as much as possible, such as:
unpaid property taxes
liens (IRS, municipal, HOA, utility, etc.)
code violations
open permits
judgments or court records tied to the owner
potential mortgages that might survive the sale
city fines or special assessments
anything else that could become my responsibility after purchase
The challenge is that this process can be pretty time-consuming, especially when every county website is different and information is spread across multiple places.
I’ve seen some investors outsource this to lien search companies or hire people to research properties before auctions, while others seem to do everything themselves.
So I’m curious how other investors here handle it.
A few questions for those of you who regularly buy at auctions:
What is your standard due diligence checklist before bidding?
How long does it usually take you to verify everything on a property?
Do you use any tools or software, or is it mostly manual research?
Do you ever hire lien search companies, and if so, what do they typically charge per property?
What are the most common hidden issues you’ve seen people miss before bidding?
I’d love to hear how experienced investors approach this so I can improve my process and avoid expensive mistakes.
Your list is fine, but you can probably save yourself some research time.
The auction rules will spell out what liens have been extinguished, and I always call the county to confirm both what is extinguished and what will remain. Doing so will cut down the number of things you have to look out for.
I use Parcel Fair to dissect the list into what properties I would like to bid on, and it provides links to the county tax records, GIS, owner info, comps and more. This saves a ton of time. If municipal liens remain I check in with code enforcement and court records for those. A property with a long list of liens, even if they are extinguished, will require a longer period of time to clear the title.
IRS liens should be embraced rather than avoided. The IRS is not in the real estate business and unless the property is high-value, it's highly unlikely they are interested in taking the property. They have 120 days to decide and if they take the property they will refund what you paid, but more likely you can reach out to them in advance and determine their interest and know how you will proceed. Properties with IRS liens get fewer bidders.
I once won the bid on a property that had a $130k lien attached from the state for hospice care (the owner was deceased with no relatives). This apparently scared many bidders off, but the county confirmed to me that the lien was wiped out and only eligible to collect on the overbid amount. There were two bidders for the property, me and a guy who owned the property behind the subject property.
He eventually dropped out so I approached him after the auction to discuss. He said he wanted to use the land for parking for the building he owned (it was commercial), and I ended up selling it to him on a seller-finance arrangement. He provided a hefty down payment and I'm still collecting monthly payments.
Investor · Clearwater, FL · Member since 2025 · 214 posts · 73 votes
6mo
I did try to buy tax sale properties back in 2021-2022 in Atlanta and surrounding counties. I had similar checklist. I also used to drive down to Atlanta to make sure I check the properties and neighborhoods physically. Because, sometimes the property might be burned down. Other times the property is in bad neighborhood even though zillow shows good ARV. I was taught that I need to woory only about IRS liens. Mortgages and all are wiped out. But a good investor will always check everything. I typically would end up with 3-5 properties shortlisted but other investors would overbid. That worked that time because the market is raising and most of them are flippers. Things are different now.
But before you go any further, whats your end goal? Are you trying to wholesale these (most tax sales are bought sight unseen) or trying to build a portfolio?
As you observed, tax sale is like you are going in blind, unlike a flip where you have due deligence period where you can back out. So, figure out whats your strategy is and then decide which route to take. Every route will take you to your destination. Challange is, figuring out which route takes you fastest.
Below are my book recommendations for you to read/listen to:
I did try to buy tax sale properties back in 2021-2022 in Atlanta and surrounding counties. I had similar checklist. I also used to drive down to Atlanta to make sure I check the properties and neighborhoods physically. Because, sometimes the property might be burned down. Other times the property is in bad neighborhood even though zillow shows good ARV. I was taught that I need to woory only about IRS liens. Mortgages and all are wiped out. But a good investor will always check everything. I typically would end up with 3-5 properties shortlisted but other investors would overbid. That worked that time because the market is raising and most of them are flippers. Things are different now.
But before you go any further, whats your end goal? Are you trying to wholesale these (most tax sales are bought sight unseen) or trying to build a portfolio?
As you observed, tax sale is like you are going in blind, unlike a flip where you have due deligence period where you can back out. So, figure out whats your strategy is and then decide which route to take. Every route will take you to your destination. Challange is, figuring out which route takes you fastest.
Below are my book recommendations for you to read/listen to:
Strategy:
Rich man in Babylon
Robert Kiosaki
Rich Dad Poor Dad
Cashflow Quadrant
Guide to investing
Real book of Real Estate
Real Estate Journey:
Ken McKelroy
ABCs of Real Estate Investing
Advanced book of Real Estate Investing
ABC of Property management
Your comment "I was taught that I need to woory only about IRS liens." Sorry, you were taught incorrectly then.
Property Manager · Atlanta, GA · Member since 2025 · 44 posts · 22 votes
6mo
As someone on the property management/operations side, I'm always looking at these from the "what will actually hit my NOI later?" angle. For me, the non‑negotiables before bidding are: confirming every lien/assessment that can survive the sale, checking for unresolved code issues that could trigger immediate repairs or fines, and understanding the realistic rentability of the property as‑is (zoning, habitability, neighborhood rent range). I still do most of the title/tax work manually through county and court records, but I'll bring in a lien search or attorney on anything that looks even slightly hairy or high‑ticket—paying a few hundred dollars up front is cheap compared to inheriting a five‑figure problem. Curious what others are doing to balance speed vs. depth when they're trying to underwrite multiple auction properties in a week.
Your list is fine, but you can probably save yourself some research time.
The auction rules will spell out what liens have been extinguished, and I always call the county to confirm both what is extinguished and what will remain. Doing so will cut down the number of things you have to look out for.
I use Parcel Fair to dissect the list into what properties I would like to bid on, and it provides links to the county tax records, GIS, owner info, comps and more. This saves a ton of time. If municipal liens remain I check in with code enforcement and court records for those. A property with a long list of liens, even if they are extinguished, will require a longer period of time to clear the title.
IRS liens should be embraced rather than avoided. The IRS is not in the real estate business and unless the property is high-value, it's highly unlikely they are interested in taking the property. They have 120 days to decide and if they take the property they will refund what you paid, but more likely you can reach out to them in advance and determine their interest and know how you will proceed. Properties with IRS liens get fewer bidders.
I once won the bid on a property that had a $130k lien attached from the state for hospice care (the owner was deceased with no relatives). This apparently scared many bidders off, but the county confirmed to me that the lien was wiped out and only eligible to collect on the overbid amount. There were two bidders for the property, me and a guy who owned the property behind the subject property.
He eventually dropped out so I approached him after the auction to discuss. He said he wanted to use the land for parking for the building he owned (it was commercial), and I ended up selling it to him on a seller-finance arrangement. He provided a hefty down payment and I'm still collecting monthly payments.
Don, your IRS play works and I've seen the bidder pool thin exactly like you describe. One thing I'd add from the financing side, since that's where I spent 15 years.
The 120-day window is the risk everyone talks about. It's not the one that gets people. Even when the IRS never exercises, that lien clouds title until it's formally released, and a release isn't automatic when the window closes. It takes a request and it takes time.
That doesn't matter if you're paying cash and holding, which is what you did, and it worked. It matters enormously if your exit is a sale to a retail buyer using FHA or conventional. No lender clears that to close over an unreleased federal lien, and your buyer's underwriter finds it in the title commitment, not before. So you're 45 days into a contract with a buyer who now can't close, and you're chasing a release you should have started the day you took the deed.
So I'd agree with embracing them, with one condition: know your exit before you bid. Cash exit, the discount is real. Financed exit, you're buying a timeline you don't control.
Don, your IRS play works and I've seen the bidder pool thin exactly like you describe. One thing I'd add from the financing side, since that's where I spent 15 years.
The 120-day window is the risk everyone talks about. It's not the one that gets people. Even when the IRS never exercises, that lien clouds title until it's formally released, and a release isn't automatic when the window closes. It takes a request and it takes time.
That doesn't matter if you're paying cash and holding, which is what you did, and it worked. It matters enormously if your exit is a sale to a retail buyer using FHA or conventional. No lender clears that to close over an unreleased federal lien, and your buyer's underwriter finds it in the title commitment, not before. So you're 45 days into a contract with a buyer who now can't close, and you're chasing a release you should have started the day you took the deed.
So I'd agree with embracing them, with one condition: know your exit before you bid. Cash exit, the discount is real. Financed exit, you're buying a timeline you don't control.
What's your typical hold on those?
It depends on various factors like property condition, location, upside for a rehab. I invest in multiple markets and for those outside of my immediate locale my primary strategy is to sell the property to another local investor, so short-term hold. If only cosmetic repairs are needed I look to seller-finance to an owner/occupant, so a longer-term hold but of the debt only.
Real Estate Consultant · atlanta · Member since 2026 · 10 posts · 2 votes
6mo
Marcelo — Good question, and your checklist is solid. The challenge you're describing — every county website is different, information spread across multiple places — is the exact reason most auction investors either (a) limit themselves to 1-2 counties they know well, or (b) hire someone to do the legwork and hope nothing gets missed.
A few things I'd add from the operations side:
Title search depth matters more than breadth. Rather than checking every possible lien type manually, I'd prioritize a full title search on your top 3-5 targets per auction. The cost ($150-300 per property depending on the county) is worth it compared to the risk of inheriting a surprise federal tax lien or a surviving mortgage. For the rest of your list, a quick county records check is usually enough to decide if it's worth the deeper dive.
Systematize your checklist. If you're bidding regularly, build a simple tracker (even a spreadsheet works) where each property gets a row and each diligence item gets a column with a status: not started, in progress, clear, flagged. The biggest risk in auction DD isn't missing a single item — it's losing track of where you are across 10-15 properties when the auction is 3 days away.
On the speed vs. depth tradeoff: The investors I've seen do this well batch their DD in two passes. Pass 1 is a 15-minute screen per property (county records, Zillow/Redfin comps, Google Street View, quick lien check). That eliminates 60-70% of properties. Pass 2 is the deep dive on survivors — title search, code violation check, attorney review if needed.
The county-by-county variation is real and frustrating. If you're working across multiple counties, documenting each county's process once (where to find tax records, who to call for lien info, turnaround times) saves massive time on repeat auctions.
I’ve been spending more time looking at tax deed and foreclosure auctions, and one thing that always worries me is making sure I’m not missing something during due diligence.
Before bidding on a property, I usually try to check as much as possible, such as:
unpaid property taxes
liens (IRS, municipal, HOA, utility, etc.)
code violations
open permits
judgments or court records tied to the owner
potential mortgages that might survive the sale
city fines or special assessments
anything else that could become my responsibility after purchase
The challenge is that this process can be pretty time-consuming, especially when every county website is different and information is spread across multiple places.
I’ve seen some investors outsource this to lien search companies or hire people to research properties before auctions, while others seem to do everything themselves.
So I’m curious how other investors here handle it.
A few questions for those of you who regularly buy at auctions:
What is your standard due diligence checklist before bidding?
How long does it usually take you to verify everything on a property?
Do you use any tools or software, or is it mostly manual research?
Do you ever hire lien search companies, and if so, what do they typically charge per property?
What are the most common hidden issues you’ve seen people miss before bidding?
I’d love to hear how experienced investors approach this so I can improve my process and avoid expensive mistakes.
Pinehurst, NC · Member since 2026 · 10 posts · 13 votes
5mo
Great question — this is something I've spent a lot of time systematizing. Here's what my pre-auction workflow looks like now:
Step 1: Legal Description scan (15 minutes for a 500-parcel list) Before anything else, I scan the Legal Description column for red-flag keywords: drainage, easement, common area, HOA, sliver, non-buildable, right-of-way, retention. Anything that hits gets flagged immediately. Usually eliminates 10-30% of a list without any further research.
Step 2: Assessed value vs. lien ratio If the lien is more than 15-20% of assessed value, I get cautious — that's a high redemption risk AND it suggests the county may have inflated the assessment. I want cheap liens on undervalued real property.
Step 3: County GIS + satellite check For anything that survived Step 1 and 2, I pull it up on the county GIS portal. I want to see: actual structure on the property, road frontage, no obvious environmental issues (standing water, wetland markers), and a usable lot shape.
Step 4: Ownership history If the county allows it (many do), I look at the ownership chain. A parcel that's been bouncing between banks or has been tax-delinquent for 5+ years usually has a reason.
Step 5: Flood zone check FEMA flood map zone AE or VE = pass unless you have a plan. Zone X = generally fine. This is a 30-second check on FEMA's flood map service.
This process takes me about 2-3 minutes per parcel after the initial cull. For a 200-parcel list I'm targeting, I can get through serious due diligence in an afternoon.
What state are you working in? Some county portals are dramatically better than others.
Specialist · Bristol, CT · Member since 2026 · 38 posts · 11 votes
3mo
CT-based investor here with 15+ years in mortgage underwriting and QC compliance. The due diligence framework I use before bidding on any CT tax deed property:
First pass — public records only, takes 15-20 minutes per property:
County grantor/grantee index for the full lien stack, not just the delinquent tax amount
Years delinquent as a proxy for how messy the title likely is — one year behind is different from four
Assessed value vs actual market value, CT towns frequently assess above market on distressed properties which distorts your bid math
Second pass — for properties that survive the first filter:
Separate IRS federal lien search, bulk data providers don't carry federal lien data reliably and IRS liens can survive a tax sale if proper notice wasn't given before the auction
Redemption period math, CT is a redeemable tax deed state so the original owner has a window to reclaim after you win, every dollar you spend during that window is at risk
Title chain review for anything that looks rushed, released liens that were never properly recorded still show up as red flags in an FHA or conventional underwriting review if you're planning to sell or refinance later
The last point is where most auction checklists stop too early. Winning the bid is step one. Getting to a clean, financeable title is the actual exit.
Investor · Los Angeles, CA · Member since 2026 · 2 posts · 1 vote
2mo
One thing I've seen trip up out-of-state buyers is assuming a junior lien is automatically gone just because a tax sale happened.
Not a legal advice, but in TX I don't really assume a junior lien is wiped until I've looked at the actual tax suit/judgement. What I want to know is whether the lienholder was actually named and served. if they weren't, I'm not comfortable assuming that lien is gone just because it sat behind the tax lien on paper.
So for me, the useful DD is less about making a generic list of lien types and more about pulling the suit file and checking who was actually brought into the case. if something looks questionable, I'd rather confirm it with a title company or attorney before bidding than try to clean it up after the fact.
A few things I personally keep an extra eye on are IRS liens, since there can be a post-sale redemption issue, and municipal/code-related liens like weed, demo, paving, nuisance abatement, or special assessments. Those seem to be very local, so I don’t assume they’re wiped without checking.
I mostly look at TX redeemable deeds, so I'm also thinking about redemption risk or penalty more than just ARV, but that's a whole separate rabbit hole.
Curious how others here handle it: do you actually pull the suit file and check service, or do you mostly treat junior liens as gone? And if you can’t physically get to the parcel, what do you lean on — boots on the ground, code records, Street View, title/lien search companies, or something else?
Specialist · Bristol, CT · Member since 2026 · 38 posts · 11 votes
2mo
@Jay Park yes, exactly. The service piece is where I have seen things go sideways. Just because a lienholder was on record does not mean they were actually brought into the process, and if they were not, their interest does not disappear just because money changed hands at the auction. I always verify that before I get comfortable.
On the remote research question, I start with the town assessor card before anything else. Not Zillow, not Street View, the actual assessor record. It tells me whether there is a structure on the land at all, which sounds basic until you almost bid on someone’s side yard because the listing app showed a hot zip code and you skipped that step. After that, GIS for the lot shape and access, code enforcement for open violations, and a separate federal lien check because the county index does not always catch IRS liens cleanly. Street View is last, just a sanity check on what the record already told me.
Investor · Los Angeles, CA · Member since 2026 · 2 posts · 1 vote
2mo
@Simone Owens, totally agree on leading with the assessor record. The side-yard example is exactly the kind of thing that can look fine on a listing app and fall apart the second you pull the actual card.
I also like your point about the separate federal lien check. I don't like relying on the county index alone for that either, especially when the downside is finding out after the sale.
Good reminder that when you're remote, the order you run the DD in matters almost as much as the steps themselves.
Specialist · Bristol, CT · Member since 2026 · 38 posts · 11 votes
2mo
Appreciate that, Jay . You caught the part most people skip. When you're remote, the order you run DD in is the whole game.
The way I sequence it comes straight from my underwriting years. You order your checks by what kills the deal, not by what's easy to pull. Cheapest deal-killers first. Federal and municipal liens, open bankruptcy, any environmental flag, all of that runs before I ever touch comps or ARV. No point modeling upside on a property a senior lien or the IRS can claw back.
On the federal piece, that's exactly why the county index alone makes me nervous too. A clean index doesn't stop the IRS from exercising its redemption right after the sale. There's a window where a federal tax lien can outlive the deed, and people find that out the expensive way. I'd rather know before I wire than after.
What does your stack look like when you're buying out of state? Are you pulling the lien records yourself or leaning on a title company for that part?
Specialist · São Paulo, Brazil · Member since 2026 · 2 posts · 1 vote
2mo
Marcelo, this is the right question to be asking early — and I'll take the data side, since the "every county is different and info is spread across places" part is the real problem, not the checklist.
Quick answers to what you actually asked:
Time: budget ~2–4 hours per property doing it carefully by hand. Most people research 10–20 per auction and bid on 3–5, so the manual math gets ugly fast once you're active.
Tools / services: some exist — PropertyOnion pulls auctions + some county data into one place, and title/lien companies (ProTitleUSA, or a local title co.) will run a search for roughly $100–200 a property. Worth it on one you're serious about. Where they fall short is coverage — they don't hit every county, and the data is often a snapshot, not current on sale day.
Most commonly missed: code enforcement liens. They quietly wreck deals — they attach to the land, survive the tax deed, and often carry daily fines that have been running for years. A house that looks fine can hold tens of thousands in violations, and it's rarely in the title search, so I check the city/county code enforcement portal separately.
The trap doing it all by hand:
A blank result isn't "no lien" — half the time it's "the county site changed or timed out and my search returned nothing," and you don't catch it until after you've bid. That's the exact failure I've spent years engineering against in data pipelines — I flag any source that stops returning data instead of trusting the blank.
If it's a handful of counties, a disciplined spreadsheet with a "last checked" column per source goes a long way. Once you're across many counties or many properties per auction, that's when it pays to pull it into one place automatically and re-check the day before the sale.
How many counties are you looking at, and are you leaning wholesale or buy-and-hold? Happy to sketch how I'd set up your checks either way.
Thanks for the shout-out to Propertyonion.com, Tiago. I agree with everyone's comments in this discussion. Due diligence is essential. Marcelo, please DM me. I have a solution for you that may solve all the issues that you list in your discussion thread.
Specialist · Bristol, CT · Member since 2026 · 38 posts · 11 votes
1mo
Quote from @Don McAlpine:
Makes sense. The investor flip works for the same reason your cash hold did, they can sit through a title-clearing timeline without an underwriter breathing down their neck.
The seller-finance one I'd watch. Looks cleaner with no bank at closing, but you didn't lose the underwriter, you just handed them to your borrower. Their exit is a refi to pay you off, and that's when an unreleased federal lien shows up in their title commitment and kills the closing. If they can't refi, they can't clear your note. So clean title is still your problem, it just waits.
That's why I start the release the day I take the deed. On the seller-finance ones, are you getting a policy issued before you carry the paper, or just handing over a warranty deed?
Makes sense. The investor flip works for the same reason your cash hold did, they can sit through a title-clearing timeline without an underwriter breathing down their neck.
The seller-finance one I'd watch. Looks cleaner with no bank at closing, but you didn't lose the underwriter, you just handed them to your borrower. Their exit is a refi to pay you off, and that's when an unreleased federal lien shows up in their title commitment and kills the closing. If they can't refi, they can't clear your note. So clean title is still your problem, it just waits.
That's why I start the release the day I take the deed. On the seller-finance ones, are you getting a policy issued before you carry the paper, or just handing over a warranty deed?
The property needs a clean title before offering seller-finance and buyer and lender title policies are required. IRS and any other liens cleared...buyer goes through underwriting, albeit with more flexibility but established guidelines. Seller finance is only offered to owner/occupants.
Real Estate Agent · San Antonio TX / Fort Lauderdale, FL · Member since 2023 · 113 posts · 25 votes
1mo
A checklist is a great start, but I'd also verify occupancy if possible and understand the auction rules for that specific county, since they can vary quite a bit. I usually focus on the property's title history, tax status, liens that survive the sale, code violations, and estimated repair costs. If something can't be verified confidently, I either factor that risk into my bid or pass on the deal.
For higher-value properties, many investors I know use a title or lien search company because it's cheaper than missing a major issue. The biggest mistakes I see are assuming all liens are wiped out, underestimating rehab costs, or overlooking occupancy and eviction challenges. Sometimes the best deal is the one you don't bid on.
Mike asked the question upthread that I think is the real one, speed versus depth when you're underwriting a dozen properties in a week. It never quite got answered.
Brett and Mark both described the same shape without naming it: two passes, not one. The first pass isn't research, it's elimination. Legal description keywords, lien to assessed ratio, is there actually a structure, flood zone. Cheap checks whose only job is to kill parcels. The deep dive only runs on survivors, so you're buying a title search on three properties instead of fifteen. Depth isn't the enemy of speed. Running everything at one depth is.
One failure mode worth adding to the checklist: a blank search result is not the same as a clean one. County portals time out, change URLs mid-season, or return nothing for a parcel format they stopped using, and empty looks identical to clear. Tiago touched on this and I think it's the most underrated thing in the thread. Anywhere you're leaning on a county source it's worth tracking when it was last successfully checked, not just what it said.
Marcelo, how many counties are you spread across? That number changes the answer a lot, because the point where this gets genuinely hard is when you can't hold each county's quirks in your head anymore.
Specialist · Bristol, CT · Member since 2026 · 38 posts · 11 votes
3w
Zuriel, the two-pass point is the whole game and I think it gets underrated because pass one looks too simple to matter. Cheap elimination checks doing nothing but killing parcels, no judgment involved, just yes or no. The temptation is always to skip straight to the interesting research on everything, and that's how someone burns three hours on a parcel that a thirty-second assessed-value check would have killed.
Your blank-result point is the one I'd underline hardest though. In CT specifically this bites people because town clerk portals vary wildly in quality, some towns have clean searchable land records online, some are still paper-only or a PDF index that hasn't been touched in years. A search that returns nothing because the town's system doesn't cover that record type looks identical to a search that returned nothing because the title is actually clean. I track a last-verified-per-source column for exactly that reason, same instinct you're describing.
On your question, I work Connecticut exclusively, so it's not a county-count problem for me, it's a town-count problem, and every one of the 169 towns runs its tax collector process a little differently. That's actually the harder version of your question in some ways. You can build one process and vary it slightly across 3,000 counties nationally. I have to hold 169 town-specific quirks in my head for one state. Curious whether you've run into CT auctions at all or if this is mostly other states for you.
Zuriel, the two-pass point is the whole game and I think it gets underrated because pass one looks too simple to matter. Cheap elimination checks doing nothing but killing parcels, no judgment involved, just yes or no. The temptation is always to skip straight to the interesting research on everything, and that's how someone burns three hours on a parcel that a thirty-second assessed-value check would have killed.
Your blank-result point is the one I'd underline hardest though. In CT specifically this bites people because town clerk portals vary wildly in quality, some towns have clean searchable land records online, some are still paper-only or a PDF index that hasn't been touched in years. A search that returns nothing because the town's system doesn't cover that record type looks identical to a search that returned nothing because the title is actually clean. I track a last-verified-per-source column for exactly that reason, same instinct you're describing.
On your question, I work Connecticut exclusively, so it's not a county-count problem for me, it's a town-count problem, and every one of the 169 towns runs its tax collector process a little differently. That's actually the harder version of your question in some ways. You can build one process and vary it slightly across 3,000 counties nationally. I have to hold 169 town-specific quirks in my head for one state. Curious whether you've run into CT auctions at all or if this is mostly other states for you.
Not CT, no. Mostly other states, so I've got the county version of the problem, not the 169-town version.
Which is why your point lands. Across counties I can build one process and flex it. You can't, every town is its own process, and the coverage gaps are the part that doesn't announce itself. A paper-only land record and a clean title read the same on screen.
That's the argument for last-verified-per-source over a checkbox. A checkbox says you looked. It doesn't say the source was actually answering.
Contractor · Baltimore, MD · Member since 2019 · 14 posts · 13 votes
3w
Due diligence on tax sales and distressed liens can easily become a massive black hole if you don't systematize it. When you're looking at markets like Baltimore, where municipal liens, environmental control board citations, and ground rent issues can completely alter the math, relying on a casual web search is a recipe for buying a very expensive headache.
Here is a breakdown of how experienced investors tackle the due diligence workflow, what to watch out for, and how to keep it from eating up all your time:
1. The Standard Due Diligence Checklist
A comprehensive checklist needs to cover three separate buckets: tax/financial, legal/title, and physical condition.
Municipal & Tax Financials: Current year property taxes, back taxes, accrued interest, and municipal liens (water/sewer, front-foot benefit charges, alley/footway paving, and environmental control board fines).
Senior vs. Junior Liens: IRS liens, federal tax liens, and certain municipal liens can behave differently depending on jurisdiction. You need to know what survives the tax sale or foreclosure action versus what gets wiped out.
Encumbrances & Title Quality: Existing mortgages, deeds of trust, mechanic's liens, judgment liens, and bankruptcy filings tied to the owner of record.
Property Specifics: Zoning, active or open building code violations, unpermitted additions, and structural integrity (especially critical for historic rowhomes sharing party walls).
2. Time Investment & Research Methods
Doing this manually from scratch can easily take 1 to 3 hours per property because county and city portals are notoriously fragmented—one portal handles real property taxes, another handles court judgments (like Maryland's Judiciary Case Search), and another tracks code enforcement or municipal utility ledgers.
Because of this fragmentation, most active investors don't rely entirely on raw manual clicking for every single parcel on a massive auction list. Instead, they use a tiered filtering approach:
Macro Screening: Run an initial automated filter to toss out properties with terrible margins, bad blocks, or extreme environmental liabilities.
Deep-Dive Audit: Once a property makes the short list, perform a rigorous manual or structured verification of the title, liens, and physical structure.
3. Tools and Software vs. Manual Research
Most serious auction buyers blend software with targeted manual checks:
Data & Sourcing Platforms: Tools like PropStream or DealCheck help pull property details, estimated values, and baseline public records quickly.
Proprietary/Custom Databases: Many top local operators build out or use localized databases (such as specialized regional tax lien intelligence trackers) to pre-vet batches of properties before the auction lists even drop, saving weeks of manual lookup time.
Official Portals: Always finish your verification by cross-referencing state assessment databases (like Maryland SDAT) and local finance/court portals to ensure no fresh liens were filed overnight.
4. Do Investors Hire Lien Search Companies?
Yes, many volume investors and out-of-state buyers outsource title or lien searches to specialized abstractors or title companies, especially for high-stakes bids.
Cost: Typical municipal lien searches or title abstract runs generally range from $75 to $250+ per property, depending on the depth of the search (e.g., whether it includes a full municipal lien certificate or a full title run).
When it's worth it: If you're bidding on a high-value asset or buying tax deeds where you are immediately stepping into ownership (rather than a tax lien certificate model where you have a redemption/foreclosure runway), paying for a professional search is cheap insurance against a missed mortgage or federal lien.
5. Most Common Hidden Issues People Miss
Environmental & Code Enforcement Fines: In many older cities, accumulated municipal citations (like high grass, uncontained trash, or vacant property registration fees) can stack up to thousands of dollars and attach directly to the property as super-priority or surviving liens.
The "Sight Unseen" Structural Trap: Relying on drive-by data or old street-view imagery and missing a collapsed roof, compromised foundation, or a heavily damaged party wall shared with a neglected vacant adjacent building.
Occupancy & Tenant Hurdles: Forgetting that winning a tax deed or completing a foreclosure doesn't automatically hand you vacant keys—dealing with stubborn occupants or local eviction moratoriums can stall your cash flow for months.
How are you currently managing your list filtering? Are you focusing mostly on tax lien certificates with a redemption period, or jumping straight into tax deeds/foreclosures where you need immediate physical possession?
Investor · Get yourself trained before doing something inadvisable. · Member since 2024 · 3k+ posts · 1k+ votes
3w
Quote from @Marcelo Amado:
Hi everyone,
I’ve been spending more time looking at tax deed and foreclosure auctions, and one thing that always worries me is making sure I’m not missing something during due diligence.
Before bidding on a property, I usually try to check as much as possible, such as:
unpaid property taxes
liens (IRS, municipal, HOA, utility, etc.)
code violations
open permits
judgments or court records tied to the owner
potential mortgages that might survive the sale
city fines or special assessments
anything else that could become my responsibility after purchase
The challenge is that this process can be pretty time-consuming, especially when every county website is different and information is spread across multiple places.
I’ve seen some investors outsource this to lien search companies or hire people to research properties before auctions, while others seem to do everything themselves.
So I’m curious how other investors here handle it.
A few questions for those of you who regularly buy at auctions:
What is your standard due diligence checklist before bidding?
How long does it usually take you to verify everything on a property?
Do you use any tools or software, or is it mostly manual research?
Do you ever hire lien search companies, and if so, what do they typically charge per property?
What are the most common hidden issues you’ve seen people miss before bidding?
I’d love to hear how experienced investors approach this so I can improve my process and avoid expensive mistakes.
Thanks in advance for sharing your workflow.
I don't.
I buy before the auction and save a ton of money.
Details available if you're intersted but it isn't difficult.
Investor · Pacific Northwest · Member since 2026 · 511 posts · 286 votes
3w
Marcelo — I think the checklist is the easy part. The real problem is doing it across 10–20 properties without wasting hours researching deals you’ll never bid on.
I’d run it in two passes.
First pass is just deal killers: confirm the parcel is what you think it is, basic title/lien flags, flood/environmental issues, access, obvious code problems, rough value and whether the auction rules create anything you don’t want to touch.
Most properties should die there.
Then spend the real time only on the survivors: deeper title work, municipal liens, court records, open permits, occupancy, rehab risk and exactly what survives the sale.
The important part is tracking source + status + last verified date. A blank county search is not the same thing as “clear,” and that’s where this stuff gets dangerous when you’re moving fast.
I’d also decide the exit before bidding. A title issue that’s tolerable on a cash hold can be a disaster if your plan requires a quick conventional resale or refinance.
If you’re still actively buying these, send me one you’re considering. I’d be interested to run through the actual property with you instead of talking about the checklist in the abstract.
Marcelo — I think the checklist is the easy part. The real problem is doing it across 10–20 properties without wasting hours researching deals you’ll never bid on.
I’d run it in two passes.
First pass is just deal killers: confirm the parcel is what you think it is, basic title/lien flags, flood/environmental issues, access, obvious code problems, rough value and whether the auction rules create anything you don’t want to touch.
Most properties should die there.
Then spend the real time only on the survivors: deeper title work, municipal liens, court records, open permits, occupancy, rehab risk and exactly what survives the sale.
The important part is tracking source + status + last verified date. A blank county search is not the same thing as “clear,” and that’s where this stuff gets dangerous when you’re moving fast.
I’d also decide the exit before bidding. A title issue that’s tolerable on a cash hold can be a disaster if your plan requires a quick conventional resale or refinance.
If you’re still actively buying these, send me one you’re considering. I’d be interested to run through the actual property with you instead of talking about the checklist in the abstract.
Michael, we got to the same place separately, which probably means it's just what the work forces on you.
The line I'd add to yours: pass one isn't cheap research, it's not research at all. No judgment, no interpretation, just yes/no on things that can kill a parcel outright. The second you start thinking in pass one, you've lost the speed the two passes were supposed to buy you.
Agreed hard on exit-before-bid. The same cloud is a shrug or a dead deal depending on who has to underwrite it later.
Real Estate Consultant · Phoenix, AZ · Member since 2026 · 8 posts · 1 vote
3w
Forty years of reading these records taught me one thing: do the reading in the order a wrong answer would cost you the most, not front to back.
Before I set a number, I answer four questions off the record itself:
1. What is actually being sold? Read the legal description, not the address. On a manufactured or mobile home, find out whether the title has been retired to real property — if it hasn't, you can win the dirt and still not own the house.
2. What survives the sale? Governmental and municipal liens, code-enforcement liens, and some special assessments ride through onto the buyer. Private mortgages are usually wiped out — but only if the holder was properly noticed. So I read the notice/service list in the file. I don't assume it.
3. Who can pull it out from under me? If the opening bid is small against the value, expect either a redemption or a bidding war. Set your walk-away number before you log in, and hold to it.
4. A blank result is not a clean result. Most of the time an "empty" search just means I searched the wrong name — a prior owner, an LLC, a misspelling, a maiden name. Run the variations before you trust the silence.
None of it is glamorous. But the deals that go bad almost always go bad on something that was sitting right there in the record, unread.
Forty years of reading these records taught me one thing: do the reading in the order a wrong answer would cost you the most, not front to back.
Before I set a number, I answer four questions off the record itself:
1. What is actually being sold? Read the legal description, not the address. On a manufactured or mobile home, find out whether the title has been retired to real property — if it hasn't, you can win the dirt and still not own the house.
2. What survives the sale? Governmental and municipal liens, code-enforcement liens, and some special assessments ride through onto the buyer. Private mortgages are usually wiped out — but only if the holder was properly noticed. So I read the notice/service list in the file. I don't assume it.
3. Who can pull it out from under me? If the opening bid is small against the value, expect either a redemption or a bidding war. Set your walk-away number before you log in, and hold to it.
4. A blank result is not a clean result. Most of the time an "empty" search just means I searched the wrong name — a prior owner, an LLC, a misspelling, a maiden name. Run the variations before you trust the silence.
None of it is glamorous. But the deals that go bad almost always go bad on something that was sitting right there in the record, unread.
Mark, your point four is the same trap I flagged upthread from the other side, and I think the pair is worth naming.
You're describing a blank because the search term was wrong. Prior owner, LLC, maiden name, misspelling. I was describing a blank because the source was down, moved, or never carried that record type at all.
Different causes, identical output, and neither one announces itself. Which is why "I searched it" isn't the thing worth recording. What you searched, where, and when that source last actually returned something is.
Real Estate Consultant · Phoenix, AZ · Member since 2026 · 8 posts · 1 vote
2w
Zuriel — that's the better framing, and the two failure modes deserve to sit side by side. Wrong query and dead source read identical on the screen, and the screen is all most people check.
The habit that catches both: before I trust a silence, I make the index prove it's alive. I pull a record I know is there — the current deed, a known lien — and confirm the source returns it, dated. If the index hands me the thing I already know exists, the blank on the thing I'm worried about means something. If it can't, the blank means nothing yet.
Costs about ninety seconds, and it's saved me from more than one "clean" parcel that was really just a county site that quietly stopped indexing two administrations ago.
Englewood, NJ · Member since 2018 · 356 posts · 60 votes
3d
I buy at the Broward County tax deed auctions regularly and the due diligence is honestly the most important part. I pull the property info from the BCPA site first — owner name, mailing address, land value vs improvement value gives you a rough equity picture. Then I check for open permits and code violations through the county building department, because those can be nasty surprises after you take title. I also run a title search either through a lien search company or do it myself at the clerk's office to see what liens are sitting on the property. The big thing people miss is that at Broward auctions you need the full 10% deposit in hand the same day, so you better know your numbers cold before you walk in. I've seen properties with $60K in back taxes and code violations that look great on paper but the rehab budget eats your entire margin.
Real Estate Consultant · Phoenix, AZ · Member since 2026 · 8 posts · 1 vote
11h
Igor — the same-day 10% is the part that makes Broward unforgiving. No walking it back once the gavel drops, so the reading has to be done cold, before you ever log in.The code and municipal piece you flagged is where Florida bites hardest. Those liens ride through the tax deed, and in a lot of Florida towns the daily fines have been running for years — a clean-looking house can carry more in accrued violations than the back taxes that put it on the block. I pull the municipal lien and code-enforcement record separate from the tax figure every time. The county's tax number won't show it.Sounds like you've been burned into doing the homework. That $60K surprise teaches faster than any checklist.