Every fix and flip loan rests on the after repair value, and that number is only as good as the comparable sales behind it. Pull the wrong comps and you talk yourself into an ARV the appraiser will not support, the loan gets capped, and you scramble for cash at closing. Pull the right ones and your deal funds exactly the way you planned. We broker fix and flip and bridge loans constantly, and the single most common reason a deal comes in short is a comp set that was optimistic. This guide walks through how to find fix and flip comps the way an appraiser and a lender will, so the value you write into your offer is the value that actually holds up.
The mechanics matter because of how a flip lender lends. They are not lending against what you pay today. They are lending against what the property will be worth finished, because that future value is what protects them if you default. So they cap the total loan at a percentage of ARV, usually around 70 percent. If your comps overstate the ARV by 20,000 dollars, your real maximum loan is roughly 14,000 dollars lower than you planned, and that gap comes straight out of your pocket. Good comps are not a formality. They are the foundation of your leverage. We cover how lenders turn that finished value into a loan amount in our guide to after repair value.
What actually counts as a comp
A comparable sale is a property similar to your finished product that has already closed. The two words that do the work there are similar and closed. Similar means it matches your renovated property on the things buyers pay for: size, bedroom and bathroom count, age, style, condition, and location. Closed means the sale is recorded, not pending and not listed. An active listing is an asking price, and anyone can ask for anything. Only a closed sale tells you what a buyer was genuinely willing to pay.
The tightest comps share four traits. They are close, ideally within a half mile and in the same school district and neighborhood. They are recent, ideally sold within the last three to six months so they reflect the current market. They are similar in size, within roughly 20 percent of your finished square footage. And they are renovated to a level near what your finished product will be, because a tired house and a flipped house on the same street sell for very different numbers. The closer your comps match on all four, the more reliable your ARV and the fewer adjustments you have to make.
Where to actually find them
You have a few sources, and they are not equal. The best is the multiple listing service, because it shows closed sale prices, days on market, photos, and the property details you need to judge condition. If you have an agent, ask them to pull sold comps for your subject property filtered to the last six months within a half mile. If you do not, the public-facing portals show recent sold prices, though with less detail and a lag. County assessor and recorder records confirm what actually transferred and for how much, which is the ground truth behind every other source. Use the portals to find candidates, then confirm the real numbers in the public record.
Whatever source you use, look at the photos. A sale price means nothing without knowing the condition that earned it. A house that closed at 230,000 dollars after a full renovation is a comp for your finished flip. The same house would have closed far lower in the distressed condition you are buying yours in. Condition is the variable new investors ignore most often, and it is the one that quietly inflates a comp set.
How to adjust comps to your property
No two houses are identical, so you adjust each comp up or down for the differences from your subject property. If a comp has an extra half bath your finished property will not have, you subtract the value that half bath adds in your market. If your property will have a finished basement the comp lacked, you add value. If a comp sits on a busy road and yours is on a quiet street, you adjust up. The goal is to restate each comp as if it were your property, so the adjusted prices are directly comparable.
Here is a worked set. You are renovating a three-bedroom, two-bath single-family that will finish at 1,500 square feet. Comp one closed at 240,000 dollars but has a two-car garage and an extra half bath yours will not, so you adjust down 12,000 dollars to 228,000 dollars. Comp two closed at 225,000 dollars and is nearly identical, no adjustment. Comp three closed at 218,000 dollars but is 100 square feet smaller, so you adjust up 8,000 dollars to 226,000 dollars. Comp four closed at 235,000 dollars but sits on a busier street, so you adjust down 7,000 dollars to 228,000 dollars. Your adjusted comps land at 228,000, 225,000, 226,000, and 228,000 dollars. They cluster tightly around 227,000 dollars, and that clustered figure, not the highest sale, is your defensible ARV.
Price per square foot is a useful sanity check but a blunt one. If your adjusted comps average about 151 dollars a foot and your property is 1,500 square feet, that points to roughly 227,000 dollars, which lines up. When the price-per-foot check and the adjusted-comp number disagree badly, something in your comp set is off, and it is worth finding out what before you write the offer.
How comps feed the loan math
Once you have a defensible ARV, the loan ceiling falls out of it. At a 70 percent of ARV cap, 70 percent of 227,000 dollars is 158,900 dollars, the most the lender will lend regardless of your purchase price and rehab budget. Say your purchase is 120,000 dollars and your rehab is 50,000 dollars, a total project cost of 170,000 dollars. A 90 percent purchase plus 100 percent rehab structure would be 158,000 dollars, which sits just under the ceiling, so the deal funds and your cash in is the slice the lender did not cover plus closing and an interest reserve. Now watch what a soft comp set does. If you had talked yourself into a 215,000 dollar ARV, the ceiling drops to 150,500 dollars and you owe an extra 7,500 dollars in cash at closing. Same house, same rehab, different comps. That is the entire reason comp discipline matters, and it is why the leverage tiers in our fix and flip loan requirements guide all sit on top of an honest ARV. Run the full structure on a deal in our guide to how 100 percent fix and flip financing works.
The comp mistakes that cost investors money
The first mistake is using active listings as comps. A listing is a hope, not a sale. Only closed transactions count, and an appraiser will use nothing else.
The second is reaching too far in distance or time. A sale from a nicer neighborhood a mile away or a closing from a year ago in a different market is not a comp, it is a justification. The appraiser will throw those out, and so should you. If you cannot find enough close, recent, similar comps to support your number, that is the market telling you something about the deal.
The third is ignoring the over-improvement ceiling. If comparable renovated sales in the area top out around a certain price regardless of finish, the market has set its ceiling, and a high-end kitchen will not push your sale above it. Spending rehab dollars that do not come back in the ARV is a real way to turn a profitable flip into a breakeven one, which is why your comp work and your rehab budget have to be built together, not separately.
The bottom line on finding fix and flip comps
Comps are where ARV discipline lives. Pull three to five closed, recent, nearby sales that are renovated to roughly your finished level. Adjust each one for the real differences from your property. Settle on the number they cluster around, not the highest one. Then build your loan math from that figure rather than the value you wish the property had. Investors who find and adjust comps the way an appraiser will almost never get surprised at closing. The ones who lead with optimism get capped, and the cap always costs cash.
Want a second set of eyes on the comps for a specific deal before you write the offer? Send the address and your comp set through our contact page or call 412-990-2941. See our short-term loan options on the fix and flip and bridge loan page, and if you plan to keep the property, model the rental side on our DSCR deal calculator.
FMC Capital is a licensed mortgage brokerage, NMLS #1840537. This article is for educational purposes only and is not a commitment to lend, an offer of credit, or financial advice. Fix and flip and bridge loan terms, leverage, rates, appraisal practices, and qualification standards vary by lender, project, borrower experience, and market at the time of application.