Landlording & Rental Properties

How to Buy a Duplex: The Ultimate Step-by-Step Guide

Expertise: Landlording & Rental Properties, Personal Development, Real Estate News & Commentary, Business Management, Flipping Houses, Mortgages & Creative Financing, Real Estate Deal Analysis & Advice, Real Estate Wholesaling, Personal Finance, Real Estate Marketing, AskBP, Real Estate Investing Basics
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A few years ago, I received a Skype video message from my little brother Chris.

He asked, “I want to buy a duplex. What is the first step? Do I get a real estate agent? Get pre-approved? What should I do?

Of course, I gave him a few resources to read that I had previously written, like “How to Buy a Rental Property in the Next 90 Days” and “House Hacking: A Beginners Guide to Hack Your Housing and Live for Free.”

But then I said to myself, “Self (that’s what I call myself)… it’s my brother and I really want him to succeed. So, why not make a blog post directly for him that helps him get from A-Z?”

After all, my first rental property was a duplex and I’ve purchased several since that day. I love duplexes, and I’m super passionate about helping others get started with duplex investing, as well.

So, that’s what I’m going to do here, for the benefit of Chris and the BiggerPockets audience. In this post, I’ll talk about:

  • Why Buy a Duplex?
  • What’s the First Step?
  • How to Find a Duplex
  • How to Analyze a Duplex
  • How to Finance a Duplex
  • And a lot more

Keep in mind, while the focus of this article is on a “duplex,” the exact same information can be used to buy a single family house, a duplex, a triplex, or a fourplex—so don’t limit yourself to just two units. In fact, if you are going to go through all the work of finding a duplex, you might as well consider the larger properties (three- or four-unit) in case a better deal can be found this way.

Furthermore, I’ll be approaching this article from two places:

  1. Someone looking to buy a duplex and live in one-half of it
  2. Someone looking to just buy a duplex as a full rental

Whichever of these two positions you find yourself in, I believe this article can help. With that, let’s get to the article.

Why Buy a Duplex?

In the beginning, I had no idea what I was doing honestly.

I was 22 years old and had purchased, fixed up, and sold my first property—my primary residence. Suddenly, I found myself facing the very real possibility that I was going to be homeless. Sure, I could go find a place to rent, but I had been bitten by the real estate bug and knew that real estate investing was going to be my ticket to financial freedom.

I read a few books (including Larry Loftis’ Investing in Duplexes, Triplexes, and Quads: The Fastest and Safest Way to Real Estate Wealth, which is incredible!), so I knew that there was potential in a small multifamily property. (To see my other favorite books, check out "BiggerPockets Presents : The 21 Best Real Estate Books Ever.”)

I called up my agent, found a small duplex that was a bank repo (the Kurt Cobain duplex that I talk about in "How I Accidentally Bought Two of Kurt Cobain’s Former Homes and Why That’s Not Even The Best Part“), and purchased it for $80,000. I spent a few weeks cleaning it up, painting it, and doing small maintenance work; then, I rented it out.

My total mortgage payment was a little over $600 per month, and I rented the front house out for around that same amount—meaning I was living almost for free! (Just paying utilities.) A year later, I moved out and rented the other home out, and ever since, I have been receiving significant cash flow each and every month and will continue to for the rest of my life.

This is what started my obsession with small multifamily properties and duplexes in general.

So, why should you buy a duplex?

Well… you shouldn’t. You should buy a great duplex deal.

Anyone can buy a rental property, but true success is found in a great deal. Buying a great duplex deal can give you several unique benefits, such as:

  • Great cash flow
  • Pay rent to yourself, rather than some landlord
  • The ability to gain two units in one transaction
  • The ability to live free or cheap while the other tenant pays your bills
  • A low-risk introduction to the world of landlording
  • Relatively easy, long-term financing
  • Relatively easy leasing of the unit(s)
  • And more

Again, simply buying a duplex is not the secret to success. If you buy a bad deal, you might as well keep renting! However, if you do your homework, shop smart, and snag a great deal, a duplex can be a great springboard to help you build your financially stable future.

How to Buy a Duplex: Step by Step

Before I dive too deep into the process for finding, analyzing, and financing a duplex, let me give you a broad 30,000-foot-overview of the entire duplex-buying process—beginning to end. Keep in mind: these steps may change slightly depending on the buyer, but this is how I treat a purchase.

1.) Get Educated

You are already doing step one, so congrats! It’s important you gain a solid understanding of how the process works, how to analyze deals, etc. before getting in too deep. This will help you avoid the risk of getting taken advantage of.

I’d also recommend you read through “The Ultimate Beginner’s Guide to Real Estate Investing” to help you gain a solid foundation for your future as a real estate investor.

Also, the BiggerPockets Podcast is, perhaps, the single greatest resource for real estate investors in the history of mankind. Seriously. And it’s nothing David Greene or I do to make it that way; it’s the honest, brutal truth from our guests. Incredible!

2.) Get Pre-Approved

When you are ready to start the process, it’s important to get your financing lined up first. Granted, you may want to switch around step #2 and step #3, because a good agent can refer you to a good mortgage broker. But either way, it’s important to get your financing lined up.

We’ll talk more about the different financing options you have in a little bit, but definitely get to a bank or mortgage company and open up the conversation.

3.) Get in Touch with a Real Estate Agent

If you are buying on the MLS (this is the list of all properties for sale through other agents—the most common way to find properties), you'll want to find a great real estate agent to work with. Don't worry, real estate agents are typically FREE for the buyer, as the seller pays the fee!

I’d recommend finding an agent who has the following traits:

  • Knowledgeable about working with first-time homebuyers
  • Knowledgeable about duplexes and other small multifamily properties
  • Tech-savvy
  • Quick to respond to questions
  • Patient with you
  • Hungry (They want to help you. You are not a burden—you are their paycheck!)

For more tips on finding a good agent, see “The Epic Guide to Finding an Investor-Friendly Real Estate Agent” or “How to Find a Investor-Savvy Real Estate Agent.”

4.) Define What You Are Looking For

It’s important that you let your real estate agent know exactly what you are looking for. If you want a duplex, let them know!

A good agent can hook you up with automatic emails that inform you about all the new deals that come up on the MLS. So be sure you have some defined criteria set.

This criteria should include, at minimum:

  • How much do you want to (or can you) spend?
  • What towns/neighborhoods will you buy in?
  • What property type do you want? (duplex, triplex, etc.)
  • What kind of condition would you prefer? (trashed, move-in ready, etc.)

Let your agent know about your criteria and have a discussion about what that might look like. A good agent will know the local market and can help clarify what is possible.

5.) Start Looking

Next, it’s time to start looking for a good deal. There are several methods you can use to find good deals, which we’ll talk about in a moment. But most likely, your real estate agent will supply you with a list of potential properties.

It’s also a good idea to look online for properties yourself, in case your agent missed any. Websites like Zillow, Trulia, and Redfin can be great for scanning through potential deals. But keep in mind, these sites never contain all the information and may also contain faulty data. Your agent will ultimately have the best data.

6.) Do the Math

Once you find some potential deals, it’s time to get out your pen and paper and start analyzing the deals. We’ll talk more about analyzing deals in a moment, but I’d recommend that you use the BiggerPockets Rental Property Calculator to analyze potential deals.

Just the other day, I looked at a duplex deal that appeared to be awesome—but after running it through the calculator, it was clearly a terrible deal! Again, we’ll talk about the analysis side of things in just a moment.

7.) Make an Offer

Once you find a deal that pencils out, it's time to make the offer. Your agent will do the bulk of the heavy lifting with this and will fill out the paperwork for you. If you are not using an agent, you may have to find the correct forms yourself—which you can usually obtain for free from a local title company.

At this point, your offer will either be:

  • Accepted (yay!)
  • Rejected (boo!)
  • Countered (most likely)

You will need to engage in some negotiation with the seller until you either come to an agreement or part ways. Keep in mind, negotiating can force you to get emotionally involved and encourage you to pay more than you should for a property. Stick with your math and don’t pay more than you should!

8.) Do Your Due Diligence

Once you and the seller agree to all terms (known as "mutual acceptance"), it's time to do your due diligence. This is the time when you will inspect the property and make sure it has everything it is supposed to have. I'd HIGHLY recommend hiring a professional home inspector (usually under $500) to look at the property and give you a detailed report of what needs to be fixed.

After the inspection, you can either choose to accept or reject the property—or make the seller pay for all/some of the repairs. It's all up to negotiation. During this time, you will also finalize all the loan documents (which can be annoying!) and review any leases on the property.

9.) Close on the Property

Next, it’s time to make the property your own. Depending on what state you live in, you will either close at a title company or an attorney’s office. Your agent should help you walk through any difficult spots up to this point.

10.) Rent the Unit(s) Out

Finally, it’s yours! However, the fun is just beginning.

Now, it's time to manage the property (or hire a property manager to do it for you). This is when BiggerPockets comes in really handy. (this site) is here to help you become a successful real estate investor, and everything on the site (the podcasts, blog, forums, calculators, and more) is geared toward this end!

Take advantage of this incredible social network!

Since you have a broad overview of how this all works, let’s move on and get into the nitty-gritty of buying a duplex, beginning with finding the best deal!

How to Find a Great Duplex Deal

There are a lot of different ways to find good deals—some easy and some hard.

We talked about using a real estate agent to find deals on the MLS, and we also talked about using online portals like Zillow, Trulia, and Redfin. But let’s talk about some more “creative” methods for finding duplex deals, for those who either need the extra push (because deals are too hard to find on the MLS in your area) or those who want the extra push (because they want an even better deal!).

Keep in mind, the following techniques are outside the realm of what a real estate agent will do—simply because there is little chance that they can make money off it. Therefore, if you pursue any of these options, understand that you may be slightly alone!

1.) Driving for Dollars

The art of driving around potential neighborhoods, looking for signs of “motivation” (long grass, boarded up windows, etc.) and tracking down the owners via the public record. For more info, see “The Driving for Dollars Bible” by Chris Feltus.

2.) Craigslist

You can actively look for potential deals in the “For Sale” section of Craigslist, of course. But you can also look for potential deals by contacting landlords who are listing properties for rent on Craigslist. Furthermore, you can actually place ads on Craigslist, telling the world that you are looking to buy a duplex.

For a great strategy on automating your Craigslist deal sourcing, see Jaren Barnes’ epic article “5 Simple Strategies For Real Estate Acquisition Domination!

3.) Direct Mail

Direct mail is the process of sending out hundreds or even thousands of letters to specific property owners with the assumption that a small number will contact you about the letter and an even smaller percentage will be a good enough deal to buy. Many wholesalers and other real estate investors find the bulk of their deals this way.

For more information on direct mail, don’t miss my article “The Ultimate Guide to Using Direct Mail Advertising to Grow Your Real Estate Business.”

4.) Networking

A lot of landlords are tired of owning their rental properties, so by networking with those individuals, you can often find incredible deals through the power of conversation. A great place to do this is in the BiggerPockets Forums, where you can meet investors from all across the U.S. and even in your backyard.

Use BiggerPockets to locate members in your town and grab coffee or lunch with them. Also, attend (or start) a local real estate meetup where you can get to know the movers and shakers in your local real estate investment community.

5.) The Marketplace

Definitely be sure to check out the BiggerPockets Marketplace for potential deals, as well. And be sure to set up keyword alerts for your local city name, so you’ll be notified when new listings from your area are mentioned!

There are many more strategies to find good deals than just what I’ve mentioned here, but hopefully this gives you a good place to start. Let’s move on and talk about the process of analyzing duplex deals.

How to Analyze a Duplex

If you order a bad hamburger from McDonald’s, you can throw it away. If you buy a bad stock, you can sell it. If you get a bad dog, you can train it. However… if you buy a bad deal, you might be stuck with it for YEARS.

This is why I’m so passionate about learning how to analyze a deal.

The fact is: if you don’t have the right math going into a deal, you’ll never get the right profit coming out of it. You make your money when you buy. This is why a thorough analysis is SO important. So, let’s walk through how I analyze a potential duplex.

First, whether you plan on living in the duplex or not, I think it’s important to do the analysis as if you were not. Why? Because chances are you won’t live there forever, so it HAS to make sense as a rental (in my opinion). Therefore, that’s what we’ll be focused on today.

When analyzing a duplex, we’re going to be looking primarily at the cash flow, which is the extra money left at the end of the day. The concept of cash flow is fairly simple (income minus expenses), but in reality, it can be difficult. There are numerous expenses that no one ever thinks of but MUST be accounted for. Things like:

  • The mortgage
  • Mortgage insurance (PMI or MIP)
  • Property taxes
  • Property hazard insurance
  • Flood insurance
  • Earthquake insurance
  • Water
  • Sewer
  • Garbage
  • Electricity
  • Natural gas
  • Propane
  • General maintenance upkeep
  • Landscaping
  • Repairs
  • New appliances
  • Capital expenditures
  • Office supplies (stamps, envelopes)
  • Software
  • Gas/mileage
  • HOA (Home Owner’s Association) dues and fees and assessments
  • City taxes
  • Advertising
  • Payroll
  • Property management
  • Vacancy rate
  • Probably a lot more I’m not thinking of…

If you forget one of these things, you are going to end up with less money than you originally thought. That’s not good! So when you are looking at potential cash flow, be sure you are taking into account all these expenses.

It’s for this reason we created the Rental Property Calculator, so you can simply plug in the numbers on a potential deal and see how it pencils out.

Let’s go ahead and do the analysis on a property as an example. This was a duplex that actually met the 2% Rule, which indicates it should be a great deal:

How to Buy a Duplex

Where I thought this was going to be a good deal, in the end, it looks like the total cash flow would be just $20.88 per month! With the $20,000-plus investment this property would take, that's a miserable 1.19 percent return on investment!

Yikes! I could do better than that with a bank CD!

Before I move on, let me just emphasize this one more time: You need to know how to do the math, and the best way to do this is with the Rental Property Calculator. So head over there, try it out (you can try it three times for free!), and sign up for BiggerPockets Pro to get unlimited use.

How to Finance a Duplex

I’m not a mortgage professional, but I’ve purchased a few duplexes in my day. So, I’m happy to share what has worked for me and others.

When deciding how you want to finance your duplex, you have a few good options. I’d recommend researching each of these in a bit more detail to decide if it’s really what you want to do—then, pull the trigger and make some phone calls. Below are the five most common methods for financing a duplex.

1.) Cash

If you have the cash, then this one should be easy. However, most people don’t, so I’m not going to spend a lot of time on this.

2.) Conventional Loans

Conventional loans are the traditional, run-of-the-mill loans that you can get at pretty much any bank or credit union. Typically, you will need to put down 20 percent to obtain these loans (depending on the bank, of course), and they are usually (not always) fixed rate (meaning the rate will never change) and carry a low interest rate.

If you can get a conventional loan, and you have the 20 percent-or-so down payment, this is a great option because of the stability that comes with a conventional loan.

To find a conventional loan, just head into your bank and talk to the banker. These are the most popular loans on the planet, so they are easy to find. But here’s a word of wisdom: Nearly every bank has the same rules and can do the same loan—BUT while the bank loans may be almost identical, the BANKER is the important piece of the puzzle.

A good banker can get loans closed that no one else can—because they are smart, creative, and persistent. So, talk with four to six different banks and find a banker who appears to be exceptional. Or more importantly—get recommendations from others to find the best bank/banker to work with.

3.) FHA Loans

The FHA (Federal Housing Administration) is a government agency that exists to help Americans become homeowners through a loan program that allows banks and other lenders to finance extremely low down payment loans to homeowners. An FHA loan requires just 3.5 percent down payment, which means on a $100,000 property, you only need to pay $3,500 (plus closing costs).

In comparison to the conventional loan, which usually requires 20 percent or more down, this can be a life-saver for homebuyers. Keep in mind, the FHA loan does have a few extra costs that can make your payment a bit higher (known as MPI or PMI), so be sure to calculate that when doing your analysis.

In addition, an FHA loan is ONLY for individuals who plan on living in the unit for at least one year, so you will have to move into the duplex to use this option. The cool thing is, however, that an FHA loan is good for single family houses, as well as duplexes, triplexes, and fourplexes.

For more information on FHA loans, don’t miss this article. And to find an FHA loan, just ask any local bank, credit union, or mortgage professional if they do FHA loans. Most of them do.

4.) 203(k) Loans

One of my favorite loan products on the market, the 203k loan is actually part of the FHA loan program—but with an interesting twist. You can incorporate the repairs into the loan. In other words, if your proposed duplex was $100,000 but needed $30,000 worth of work, you can get an FHA loan that requires just 3.5 percent of the total cost ($130,000) and finance the repairs into the loan.

Like the FHA, the 203k loan requires you to live in the property for a year but is applicable for duplexes, triplexes, and fourplexes.

5.) VA Loans

If you are a U.S. Veteran, you can obtain a VA loan that requires $0 down. Yep, nothing, nada, nilch! To learn more about VA Loans, see “What Is a VA Loan?

Hopefully this list has given you a few places to start looking for a loan. As I mentioned earlier, referrals from good professionals are the best way to find other good professionals, so ask around!  New loans and new loan products are being produced all the time, so you’ll never know what is out there until you pick up the phone and start calling.

Conclusion: Buying a Duplex

At almost 4,000 words, it’s about time I wrapped this post up. However, this may be the end of the article, but it’s just the beginning for you… Now is when you need to take action!

Go out and find that killer good duplex deal and change your life forever! 

I want to end with a personal note to my brother. And since you are all eavesdropping on my blog post to him anyways, I’ll let you tag along on this!

Hey Chris,

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I’m so excited you are looking to buy a duplex! I know buying my duplex was the springboard to all the adventures in real estate I’ve had so far, and I’d highly recommend it to you to get started. The experience you’ll gain will change your life, and the financial freedom it can bring will be so rewarding! If you can find a good enough deal, you’ll be able to save so much money each month while getting some great “on the job training” for the rest of your life as a real estate investor. 

I’d encourage you to re-read this article a few times and create a game plan. Yep, actually grab a pencil and paper and write down what your steps are going to be. (Hint: I’ve outlined them above!) Then, figure out what your Next Actionable Step is. (What’s the one small next step you can do to get moving forward?) I’m guessing it’s picking up the phone and calling your bank. Or maybe it’s calling a real estate agent and setting up some appointments.  

Either way—I just want you to know I’m proud of you, and I’m here for you! Let me know how I can help. 🙂



That goes for the rest of you as well.

How can I help?

Brandon Turner is an active real estate investor, entrepreneur, writer, and co-host of the BiggerPockets Podcast. He is a nationally recognized leader in the real estate education space and has tau...
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    Rafael Herrera from Canoga Park, California
    Replied over 3 years ago
    Thank’s Brandon! Keep um coming!
    Demetrius Baldwin from Hattiesburg, MS
    Replied over 3 years ago
    What a great read thank you very much for all of the insight and knowledge that was put into this post.
    Christian Funicelli Real Estate Agent from Potomac, Maryland
    Replied about 3 years ago
    Great article! Going through it i have opened about 7 more articles that will probably each have another few articles pop up. i can’t stop! lol I will be a house hacker in the near future so i must read it all.
    Prince Addo
    Replied over 2 years ago
    Thanks for your great article. I have a question. Can one secure an HFA or 203k loan using a corporate name or it must be in one’s personal name?
    Jatin Paul Sehgal
    Replied almost 2 years ago
    oh Man! I’m a newbie and constantly searching online for info; I have to say, reading this article gave me more info in a few thousand words than I got from reading stuff on other websites over time; and one does get the feeling that you (Brandon) genuinely want to help and share your knowledge. I’ve just become a member after reading. The tools are confusing to me initially but I’m sire once I start using them it will get simpler, just like anything else. Thank you Brandon, you just gave me some more courage and confidence brother.
    Daelan Dunn from Gilmer, Texas
    Replied almost 2 years ago
    Thanks Brandon that was amazing and it really helped me out some things I’ve trying to figure out
    Obed H. Bey from Philadelphia, PA
    Replied over 1 year ago
    Wow! That was awesome. Like my accountability partner reminded me I’ve been talking about getting into real estate for a couple of years now without any real action. My fears included not knowing what I was doing and how to I begin. This article gives me some specifics which I need. My question is do you have any thoughts on using the equity in another home to finance my first deal? Thank you so much for this article. I feel in my guy that I am finally ready and serious about jumping in the real estate ocean.