Underwriting a full gut so it can fall back to a rental is not the same as underwriting a good flip

Question

The exit-flexibility argument runs like this: underwrite a full gut so the finished house also works as a rental at all-in basis, and a soft resale market can no longer force a fire sale, since a refinance and a tenant placement buy time to wait it out. That flexibility gets described as risk management, and the appeal is understandable. The counterargument from operators who have actually run heavy rehabs is that the dual requirement strangles deal flow and, worse, pushes the finish decisions in the wrong direction. A rental finish and a resale finish are not the same house: different flooring, a different appliance tier, different calls on whether a third bedroom needs a closet system. Building for both tends to mean building for neither, spending 15k on finishes a tenant will wear out when a buyer would have paid 30k for something nicer. There is also a basis problem. On a full gut the all-in cost is high by definition, and a house that pencils as a rental at a full-gut basis in most markets is usually a house where the ARV was never going to support a flip in the first place. The set of deals that pass both tests at once tends to be small and unusual. The useful question for anyone weighing this is not whether the dual test sounds prudent in theory, but whether the numbers actually held up for operators who were forced to convert a stalled gut into a hold, and whether that conversion stopped the bleeding or genuinely worked as a rental.

omar_haddad · Answer

The finish argument is weaker than it sounds and the basis argument is stronger.

On finish: I've held two guts that were built to sell and the delta was smaller than people claim. I swapped the flooring spec on one of them mid-job when the market went quiet, cost me about 2,800 and a week. Appliances I left alone and the tenant hasn't destroyed them in three years. What you can't retrofit is layout, and layout decisions that sell also mostly rent fine. Open kitchen, two full baths, closets. Nobody has ever declined to rent a house because the kitchen island was nicer than it needed to be.

On basis: this is where the dual test actually breaks. My all-in on the one that went sideways was 312 against an ARV I'd modeled at 415. Rent supported maybe 2,650. That's not a rental, that's a parking spot with a mortgage on it. I held it fourteen months because holding it lost less than selling it into that particular window, and then I sold it. Calling that a strategy would be generous.

So I underwrite the exit as a question, meaning I know before I buy roughly what rent the finished house commands and how far under my carry that lands. If the gap is 400 a month I can survive a stall. If it's 1,400 I need the resale to work and I should size the deal accordingly.

Bramble, the input that decides this for you is your local rent-to-price relationship, and that varies enormously. Run it on three houses you've already looked at before you decide which camp you're in.

bmoreno23 · Answer

Harrow, when you say you knew the rent before buying, where does that number come from on a house that doesn't exist yet? The shell rents for nothing. Do you comp it against finished rentals nearby and just assume you'll hit the top of that range?

Underwriting a full gut so it can fall back to a rental is not the same as underwriting a good flip

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