3 House Hacking Mistakes I Made (& How I Could’ve Prevented Them)

by | BiggerPockets.com

Twenty-four months ago, I was completely against real estate. I wanted nothing to do with it. I thought that in order to qualify as a real estate investor, you had to pass this unofficial test to prove that you were money-grubbing jerk who would step over your mother’s dead body for a dollar.

Thanks to BiggerPockets, I realized that not all real estate investors are like that. I learned that there is a community of real estate investors who are willing to give advice without compensation. After 11 months of research, networking, and interacting on BiggerPockets, I was able to go from a hater to closing on my first house hack.

Nine months of landlording later, despite all of the research I did, I still made mistakes. Since I learned so much from other people, I am morally obligated to share with you my three biggest mistakes that I made as a first-time landlord and home owner.

Mistake #1: The Up/Down Duplex

My first purchase was an up/down duplex. My plan? To rent the top off half and Airbnb the bedroom in the bottom half while making a quasi-bedroom out of the living room. That plan 85 percent succeeded.

What I did not realize was the noise transfer from the top to bottom floor in an up/down duplex is almost unbearable. I can hear EVERYTHING that the folks on the top floor are doing. And yes, I mean everything—from them walking, to their TV, to normal conversations and other noises you don’t want to hear (peeing, sex noises, etc.). This gets very annoying, very quickly.

Aside from the noise, another problem with the up/down duplex is gravity. Everything runs down. That includes plumbing. The water that my top tenants use comes through their pipes down the pipes in my unit into the main line and out to the street. What does that mean? If there is a blockage, guess whose unit gets flooded with a disgusting mixture of kitchen sink and toilet water? ME!

Related: Why I’m Not House Hacking (& the Strategy That Will Cover More of My Rent)

Lesson Learned

This is not to say all up/down duplexes are like this. My advice to you is that if you are thinking of purchasing an up/down duplex, make sure you are with someone else. When you visit the property, have them walk around upstairs while you are downstairs. Have them walk and talk, as noise transfer can be both on impact (walking, dancing, etc.) or airborne (talking, music, etc.). If it seems kind of loud, then it will be almost unbearable when you are dealing with it every day.

On the plumbing issue, it is tough to test this before getting in. I suggest getting a sewer scope done and asking the technician to scope the plumbing lines within the property as well, from the sink of the top unit, through the bottom unit, the main line, and out to the street (or septic tank). This will make sure that the pipes are not blocked, in good shape, and will have a lower probability of clogging.

Mistake #2: New Build or Complete Remodels

The up/down duplex I purchased was a complete gut and remodel. The only thing that remained the same was the exterior wall—at least that’s what they said. Supposedly, there was all new plumbing, HVAC, water heater, electrical, roof, and appliances, all of which were under warranty.

The problem with all these systems working together is that they had not yet been tested in a living situation. Most of these upgrades would have failed the “real life” test. For example, it turns out that only 50 percent of the plumbing was replaced. The sludge from the previous occupants was clogging the pipes, which caused a backup in the lines such that my unit flooded every time I turned the kitchen sink on. The smell was rancid, but the hundreds of flies loved it!

Plumbing was not the only issue. For 2-3 weeks in the heat of the summer, the AC would continuously trip the electrical breaker and stop working. My Airbnb guests (and I) were not happy. After the electrician and the HVAC company played the blame game for a few weeks, the HVAC company replaced the unit free of any monetary cost, but it was very expensive in terms of comfortability.

In the winter, one of the PVC pipes on the furnace disconnected and caused a leak. This wasn’t too destructive, but the constant dripping each time the heater turned on and off was quite the annoyance. The HVAC company came to fix it. Again, $0 but a huge pain in the butt.

Most recently, one of the fuses that transfers electricity from the utility company to the property stopped working 100 percent. This was the line to a couple of the bedrooms and the hot water heater. So, I had a day of cold showers and really creepy electrical problems, with the lights consistently flickering, weird ticking noises, or half-lit rooms. This also was under warranty, but what the heck?! Can’t I just live like a normal human who is lucky enough to live in a developed society?

There have been a few other smaller problems that have resulted from these issues, including some broken dry wall, fly infestation, etc. I pray that the large issues are fixed.

Lesson Learned

Do not purchase an untested new build or a complete remodel. If you do, make sure you do your due diligence not only on the property, but on the person or company who performed the remodel. Do they have a reputation of putting lipstick on a pig?

Putting lipstick on a pig means that they made the place look beautiful to increase the price, but the guts of the property are less than satisfactory. For example, they opted for new stainless steel appliances, hardwood floors, etc. However, the parts you can’t see (plumbing, HVAC, etc.) are not up to par.

Lesson learned!

Mistake #3: Accepting Too Much Rent

My property was the only one of its kind in the neighborhood. Believe it or not, there was only one newly remodeled up/down duplex attached to a row home. In fact, there were hardly even any 1-bedroom up/down duplexes at all. How did I know what to price this unit at? I didn’t. So this is what I did.

Once I went under contract, I listed the property for rent and started showing it. I started off at a high price and incrementally lowered it until I got a qualified tenant. The price we settled at was a two-year lease at $1,700 plus a $50 monthly pet fee. So the total was $1,750, which I later learned was likely $200-$300 above market rent.

Related: 10 Lethal Mistakes to Avoid on Your First Real Estate Investment

What’s the mistake here? Well, to start out, despite signing a two-year lease, the tenants no longer live there. We mutually terminated the lease due to a combination of it being too expensive and them not having the space they needed. They would frequently fight, the dog would bark at odd hours, and they would dance across the hardwood floors. The noise made it almost impossible to live beneath them.

Fortunately, I do have enough buffer such that if I reduce the rent, my deal still works. It just doesn’t work as well as it did initially.

Lesson Learned

Make sure you set the price such that you have a swarm of people interested in your place. After you’ve dwindled it down to 3-5 candidates who are interested and qualified to rent your place, make your pick as to who you think will be the highest quality tenants. Be careful to watch for any discrimination laws!

While this is something I did not learn firsthand, be sure to  there is a buffer in your rents. Can you reduce your rents by $200 and still make the deal work? If not, you may have yourself a risky deal. If so, there is a high probability you will be able to withstand a market downturn or lower rents.


Don’t get me wrong, I could write a book on all the mistakes I made on my first property. Instead, I spared you the small, insignificant ones and left you with the three largest. Hopefully, this article did not scare you. Clearly, I have made some big mistakes that I am dealing with appropriately, but I am still doing well. Stay tuned for another article in the next couple of months about how well my house hack did from a financial perspective, despite the setbacks. Hopefully you learn from my mistakes! Happy investing!

What are the biggest mistakes you learned from your first investing adventures?

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About Author

Craig Curelop

After developing a huge love for real estate investing and personal finance, Craig decided to join the BiggerPockets team as a financial analyst. Over the past few years, he has looked at hundreds of financial models of startup companies. His experience will help BiggerPockets reach the next level as a startup company. Craig has a passion for helping others get out of their “comfort zones” to get what they want and achieve the “impossible.” In his spare time, Craig enjoys traveling, hiking, exercising, and sports of all kinds.


  1. doug harrell

    Great article, i like the points you raised about the up down condo situation. Looking into sewer pipes is a huge one. Knowing where to look and what to look for is a big task, when evaluating a potential purchase , if youre lucky enough to be able to walk through the property pre purchase. The above situation just reinforces the necessity of having a team of people behind you. Had the author known a contractor or an extremely handy person with 10+ yrs or construction experience, and had this person walk through the property with them these issues and bad experiences could,potentially, have been avoided or advised ahead of time…

  2. Jeff Knorr

    I also purchased an up/down duplex as my first house hack… The noise transfer between floors and even between rooms in the same unit is very annoying. It doesn’t have to be that way! With a little better construction most of the noise could have been minimized during the build phase (using insulation, sound sealants, and Quiet Rock instead of regular drywall). To help try to keep the noise down now, I’ve started installing padded hallway runners and padded area rugs–they make a huuuge difference! Definitely a lesson learned though–it’s much easier (and only slightly costlier) to do things right the first time.

    • Craig Curelop

      Great advice, Jeff! I am going to have to look into that. Though I have not heard any of my tenants or AirBnb guests complain so I also second guess if I’m overly criticizing my place. Either way, hoping to figure out a solution in the next few months.

  3. Jeff White

    Good article Craig! I’m also dealing with some noise issues in my four unit because it is a up/down construction as well. It is sometimes tough to predict certain plumbing or electrical issues since a lot of that stuff is hidden from plain sight. Sewer scopes and a good home inspector can help though in the front end.

    In my opinion, the unfortunate thing with small multifamily in Denver (I saw probably 10 multifamily properties before I got mine) is that most investors who own them but don’t live in them usually do minimal maintenance/repairs, and that is unfortunate for house hackers/owner occupients/on-site property managers because you will see/hear all the issues. It sounds like yours was a fix and flipper who dressed it up while cutting corners on plumbing and electrical.

    The good news is that you have learned from this: how to handle tenants, how to handle loud pets, sex and other noises, how to handle maintenance/repairs, how to deal with contractors, and still cash flow while getting a great education . You are well on your way to achieving financial independence….one property at a time! The next one will be much better.

  4. Edward Jinadu

    The last point you pointed out is not a mistake. Apartments complex do it here in Florida all the time. Infact every apartment I have lived have raised the rents by at least $50 every year and then give the new tenants coming in like $100 discount. At the end of your lease you either sign a new one or you leave at the end. My present rent went up from $1100 to $1300 in about 1 yr but I still stayed.

    • Craig Curelop

      Who knows Ed? Maybe you’re right. But I think having a larger option pool to pick from would have helped my case in making sure I got tenants who didn’t fight and din’t have a dog. But I suppose there’s no such thing as the perfect tenant!

  5. Michael Boyer

    Neat article Craig (and fun to read!). I think the “what not to do” genre can be the most instructive for readers. I also like how this piece (especially first 2 points) highlights that even the most dedicated landlord can be vexed by a problematic property. No matter how skilled or careful the captain (landlord), a leaky ship (property) will make the landlord voyage a rough one. Best of luck!

  6. Shelby Ek

    I also have an up/down duplex. I’ve lived in it for 12 years and am only on my 2nd set of tenants. It was the best thing I ever did for myself. The first few years were the hardest, lots of learning curves, mistakes. But now it’s super easy and I’m under contract on another 2-unit now and will repeat the process (hopefully much quicker this time). I live on the upper levels and have a toddler who I imagine sounds like a gorilla above my tenants, they insist however that they barely ever hear us. I hear them sometimes, but I also live in a city so I hear a lot of noises and probably am so used to it by now so much noise gets tuned out. Sound like you have a great attitude and are learning a lot! Best of luck to you.

  7. Joe Zupancic

    I’m currently living in the top floor of a two unit over/under house.

    A few of the things I’ve noticed. When we bought the place I could see it had TJI floor joist (relatively newer house) so that helps with the noise. It also has radiant heat, so the second floor has a 1 1/2 “ skinny slab that helps drown out the noise from downstairs/upstairs. Despite this you can absolutely tell exactly where the noise comes from, such an non-insulated access panel or interior wall that was not insulated.

    I’ve notice a lot of sound (TV, talking on the phone) comes around the downstairs unit door (one main entry area leading to up and down unit doors) and in the process of replacing it, I noticed it had no insulation around it in the rough opening, that helps a ton and is surprising how much noise that comes through a door is because of that. Replacing that entire beat up door with a steel exterior grade door should also help; I just haven’t completed that yet.
    When the downstairs unit was vacant for a month or so I was down there working a bit and noticed the worst of the upstairs noise was my 4 year old bouncing around. There is absolutely nothing I can do to mitigate this though!

    As far as big rents, we started out renting it out to two tenants. Through that first period we decided that 2 people make a lot more noise than one and specifically tracked down someone to live there single at a reduced rent even though it has 2 bedrooms. Less $ in the account but far less coming and going noise and has seemed to help a lot.

    In the end, this type of situation is not free of quirks. I’m certainly not complaining though, because all of this is far less painful than paying a full mortgage by yourself! We bought this place in December of 2015 before I ever heard of the term “house hacking” and it has been an amazing way to change our financial position.

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