Every flip analysis starts with one number: after-repair value (ARV), the price the property should sell for once the renovation is finished. Rehab, holding costs, profit, and the offer itself are all subtracted from it. If the ARV is wrong, everything downstream is wrong too, no matter how careful the rest of the spreadsheet looks.
That is why experienced flippers judge an agent quickly on ARV. An agent who sends a defensible ARV with the comps behind it gets the next deal. An agent who sends a hopeful number pulled from an active listing gets politely ignored.
This guide walks through how agents can calculate ARV the way serious investors expect. It is education, not an appraisal and not underwriting advice for a specific property. Your state's rules on opinions of value still apply, and your investor makes the final call.
What ARV Actually Means
ARV is not what the house is worth today, and it is not what the seller hopes to get. It is an estimate of what a buyer would pay for this specific property after a specific scope of work is completed.
That last part matters. The same house can have several ARVs:
- A light cosmetic refresh supports one value.
- A full gut with a new kitchen, baths, and systems supports a higher one.
- Adding a bedroom or bath, where permitted, can support a higher one still.
So the first step in any ARV is not pulling comps. It is agreeing on the finished product. If you want help scoping that work, see how agents can estimate rehab costs without being contractors.
Step 1: Define the Finished Property
Before you open the MLS, write down what the house will be when the flipper is done:
- Beds and baths after the rehab
- Finished square footage (above grade and below grade separately)
- Finish level: builder grade, mid-range, or high-end for that neighborhood
- Major features: garage, basement, lot size, any view, busy road, or other external factors
- Anything the rehab will not change, like the layout constraints or the location on the block
This short description is your "subject after repair." Every comp you pick gets compared against it, not against the house in its current condition.
Step 2: Pull the Right Comps
Comps are where most ARV mistakes happen. Flippers expect comps that look like the finished product, sold recently, close by.
Use sold comps, not active listings
Active listings show what sellers are asking. Pending sales show what a buyer agreed to, but the price may not be final. Closed sales are the evidence. Use actives and pendings only as context about where the market is heading.
Match the renovated condition
The comps that matter for ARV are homes that sold in renovated condition similar to your planned finish level. An unrenovated sale on the same street tells you about the purchase price, not the after-repair price. A luxury remodel two streets over may overstate what a mid-range flip will bring.
Keep them close and recent
Stay in the same neighborhood, school boundary, and market segment whenever you can. Use the most recent sales available, and widen the date range or radius only when you have to. When you widen, say so in your write-up.
Match size, type, and layout
Compare single-family to single-family, similar square footage, similar bed and bath count, and similar age and style. A three-bed ranch and a three-bed split-level may not sell to the same buyer.
Aim for a small set of strong comps
Three to five genuinely comparable renovated sales usually tell a clearer story than ten loose ones. If you can only find one or two, that is important information. It means the ARV carries more risk, and you should say so.
Step 3: Adjust Each Comp Toward the Subject
No comp is identical to the finished subject. Adjustments are how you account for the differences. The rule is simple: adjust the comp to look like the subject.
- If the comp is better than the subject (extra bath, garage, larger lot, nicer finishes), adjust the comp's price down.
- If the comp is worse than the subject, adjust its price up.
Common adjustment categories:
- Living area
- Bedroom and bathroom count
- Garage or parking
- Lot size and usability
- Finish level and condition
- Location factors, such as a busy road or backing to commercial
- Time, if the market has clearly moved since the comp sold
There is no universal dollar figure per adjustment. Base adjustments on local evidence, such as paired sales and what you have seen sell in that neighborhood. When you lack local support, keep the adjustment small, explain it, and lean conservative.
Step 4: Reconcile to a Range, Not a Single Number
Once each comp is adjusted, you have several estimates of what the finished subject would sell for. Do not just average them and stop.
- Weight the best comps more heavily. The most similar, most recent, closest sale deserves more influence than a stretch comp.
- Look at the spread. If adjusted values are tightly grouped, confidence is higher. If they are spread widely, find out why before you send anything.
- Check price per square foot as a sanity test. Compare the subject's implied price per square foot to the renovated comps. It is a cross-check, not a replacement for adjustments.
- Present a range. A low, likely, and high figure tells the investor more than one number does.
Illustrative math only (not real comps or a market average):
Say you find four renovated sales that fit the subject. After adjustments, they land at $338,000, $344,000, $347,000, and $362,000. The first three are tight and very similar to the subject. The fourth sold with a finished basement the subject will not have, and even after adjusting it still sits high.
A reasonable write-up might be: "Likely ARV around $345,000, supported by three close comps. Conservative case $338,000. The $362,000 sale is an outlier and I would not underwrite to it."
That is the kind of ARV a flipper can plug straight into their maximum allowable offer.
Step 5: Stress-Test the Exit
ARV assumes a buyer will pay that price when the flip is finished, which may be months away. Before you send your number, ask:
- Who is the end buyer? First-time buyers using financing, move-up buyers, or cash buyers? The answer affects what finishes and price points work.
- Will it appraise? If the end buyer is financing, the appraisal needs to support the price. A thin set of comps is a warning sign.
- How is inventory trending? Rising inventory and longer days on market can soften resale prices by the time the flip lists.
- Is there a ceiling? Most neighborhoods have a price the market rarely exceeds, no matter how nice the renovation. Find it and respect it.
If these answers make you nervous, use the conservative end of your range. If they make the deal stop working, that is a real answer too. Here is how to tell a flipper the deal doesn't work without hurting the relationship.
How to Present ARV to a Flipper
Investors want to check your work quickly. A clean ARV summary usually includes:
- The subject after repair: beds, baths, square footage, and finish level you assumed.
- The comps: address, sale date, sale price, key differences, and adjusted value for each.
- Your range: conservative, likely, and high, with a sentence on which you would underwrite to.
- Confidence notes: how many strong comps you found, anything you could not verify, and any market concerns.
- The link to the buy box: whether the ARV falls inside the investor's target price range. If you are not sure what that is, start with what a buy box is and how agents use it.
Keep it to one page. The goal is to make the investor's decision faster, not to impress them with volume.
Common ARV Mistakes Agents Make
Using list prices or online estimates as ARV
Automated estimates can be a starting point for screening, but they do not know the scope of the rehab or the finish level. Flippers know that, so an ARV that matches a public estimate to the dollar raises questions.
Picking the highest comp
It is tempting to lead with the best sale on the street. Investors who have been burned before will spot it. Lead with the most similar comps, not the most flattering ones.
Mismatching rehab scope and ARV
A light cosmetic budget cannot borrow the ARV of a full remodel. Make sure the rehab scope and the comps describe the same finished house.
Overpromising
Never guarantee an ARV, a resale price, or a profit. Give your honest estimate, show your evidence, and let the investor decide.
A Simple ARV Workflow You Can Reuse
- Agree on the scope and write the "subject after repair" description.
- Pull renovated, closed comps in the same micro-market and keep the strongest three to five.
- Adjust each comp toward the subject using local evidence.
- Reconcile to a range, note your confidence, and stress-test the exit.
- Send a one-page summary with the comps attached.
- After the flip sells, compare the actual sale price to your estimate and note what you learned.
That last step is how agents get sharper over time, and it is the habit that turns you into the go-to agent for house flippers in your market.
FAQ
What is the formula for ARV?
There is no single formula. ARV comes from comparable renovated sales, adjusted for differences from the finished subject property and reconciled to a range. Some people express it as "adjusted comp value" or use price per square foot as a shortcut, but serious investors expect to see the comps and adjustments behind the number.
How many comps do you need for ARV?
Three to five strong, renovated, closed sales are a common target. Fewer strong comps can still work if you explain the limitation. More weak comps do not make an ARV more accurate.
Should agents use active listings to calculate ARV?
No. Active listings are asking prices. Use closed sales for the ARV itself, and use actives and pendings only as context about current competition and direction.
How does ARV connect to the 70% rule?
The 70% rule is a quick screen that multiplies ARV by a percentage and subtracts repairs. It only works if the ARV is honest, and it skips costs that a full analysis includes. For the full picture, see maximum allowable offer explained for real estate agents.
Soft next step
Flip Engineers helps agents build the skills and systems flippers and developers look for, including honest deal analysis that investors trust. If you want help tightening up how you run ARV and present deals in your market, book a call.