Buying a house with an unpermitted converted garage

Houston, Texas
Rehabbing & House Flipping
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Buying a house with an unpermitted converted garage

Melissa Faraias
Member since 2023 · 65 posts · 28 votes

Hello BP community,

I am currently in the process of buying a house where the seller has converted the garage to a bedroom but without a permit. I contacted the permit office to get a retroactive permit but they said that they do not issue permits after the fact. I plan to rehab the house and flip it, but I am concerned that the square footage of the unpermitted garage will not be included in the appraised value and hence my sale price will be lower affecting my flip profit significantly. Even if I keep it as a rental, my DSCR lender may not take into account the unpermitted square footage as well. As per my contractors, the garage conversion seems to have been done well but I plan to have my structural engineer and subcontractors check the work thoroughly. The garage bedroom has a large windows, a closet, AC and electrical. I have not closed on the house yet and I am wondering what to do at this point. Any advice would be greatly appreciated. Thank you in advance.

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Sultan Ali
Wholesaler · Irvington, NJ · Member since 2025 · 112 posts · 53 votes
1y

Hey Melissa, I've run into this before. Most appraisers and lenders won't count the unpermitted square footage, so I'd run your numbers as if the garage is still a garage. Buyers might see it as a bonus room, but you can't rely on it for ARV or loan purposes. If the deal still works without that space, great, if not, you may want to renegotiate or even consider converting it back.

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  • Shaza Atassi
    Contractor · San Antonio · Member since 2024 · 9 posts · 5 votes
    1y

    Unpermitted garage conversions are always tricky. Appraisers and DSCR lenders usually won't count the extra square footage, so your ARV and loan numbers need to be based only on the permitted GLA. Even if the work looks solid, it's still a resale risk. Unless the deal pencils out without that extra "bedroom," I'd negotiate the price down or plan to convert it back. If your flip profit depends on the unpermitted space, I'd pass.

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  • Michael Hernandez
    Real Estate Broker · Antioch, Ca. 94509 · Member since 2025 · 149 posts · 21 votes
    1y

    Melissa, you are right to pause here because unpermitted work can eat into both your resale value and your refinance options. If the city will not issue a retroactive permit, you need to underwrite the deal as if that extra square footage does not exist. That way your numbers stay safe and you are not counting on value that may never be recognized. What is in it for you is peace of mind and protection of your profit margin, since buyers and lenders both lean on what is officially permitted. If you still like the deal with those conservative numbers, then any extra function from the converted room is just a bonus for tenants or end buyers. If the deal only works by including the added square footage, it is probably smarter to walk away and find one that lines up cleaner with your goals.

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  • Peter MckernanBusiness Member
    Residential Real Estate Agent · Irvine, CA · Member since 2013 · 2k+ posts · 1k+ votes
    1y

    If you are doing permits on a rehab, the inspector will see other things that are not to city code and call them out. This means you would have to basically start over again on the garage conversion to get to a place that the contractor can rebuild the garage. If any square footage is not permitted the appraiser will not count it and you will be hopeful for a higher dollar amount when you do not get it.

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  • Melissa Faraias
    OP
    Member since 2023 · 65 posts · 28 votes
    1y

    Thank you all for your replies. I also just discovered that the HOA does not permit garage conversions in the neighborhood so taking all of this into account, I have decided to renegotiate the purchase price or terminate the contract.

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  • Sultan Ali
    Wholesaler · Irvington, NJ · Member since 2025 · 112 posts · 53 votes
    1y

    Hey Melissa, I've run into this before. Most appraisers and lenders won't count the unpermitted square footage, so I'd run your numbers as if the garage is still a garage. Buyers might see it as a bonus room, but you can't rely on it for ARV or loan purposes. If the deal still works without that space, great, if not, you may want to renegotiate or even consider converting it back.

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    • Melissa Faraias
      OP
      Member since 2023 · 65 posts · 28 votes
      1y
      Quote from @Sultan Ali:

      Hey Melissa, I've run into this before. Most appraisers and lenders won't count the unpermitted square footage, so I'd run your numbers as if the garage is still a garage. Buyers might see it as a bonus room, but you can't rely on it for ARV or loan purposes. If the deal still works without that space, great, if not, you may want to renegotiate or even consider converting it back.

       Yes, makes sense. Thank you so much.

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