How to calculate ARV (after-repair value): the comps method, step by step (2026)

What ARV is — and the mistake baked into most estimates

ARV is the market value of the property after your planned renovation: the price a fully renovated version of your house would trade for today, in that neighborhood, to a normal buyer with normal financing. Two things follow from that definition. First, ARV is notpurchase price plus rehab budget. Spending $45,000 renovating a house does not add $45,000 of value — it might add $70,000 in a neighborhood that rewards renovated product, or $25,000 in one that's already priced near its ceiling. The market decides, not your invoices. Second, ARV is a forecast of an appraisal. On a refinance, a licensed appraiser will pull renovated comparable sales and reconcile them to a value — your job when estimating ARV is to run the same play the appraiser will run, before you commit money to the deal.

ARV ≈ average renovated-comp $/sq ft × subject finished sq ft

That one-liner is the last step of the process, not the process itself. The work — and the accuracy — lives in which comps you select and how you adjust them.

Why ARV runs the whole deal

Three load-bearing numbers key directly off ARV. The 70% rule sets your maximum offer at 70% of ARV minus rehab costs — get ARV wrong and every offer you write is wrong by 70 cents on the dollar. On a BRRRR, the refinance lender sizes your cash-out loan at typically 70–75% of the appraised value, so ARV determines how much of your capital comes back out to fund the next deal. And on a straight flip, profit is ARV minus everything else — purchase, rehab, holding, and selling costs — so ARV error flows through to the bottom line dollar for dollar. Rehab overruns get the blame for most bad flips, but an optimistic ARV does at least as much damage, because it inflates the top line that every other number is subtracted from.

The comps method, step by step

Take a concrete deal: a dated 3-bed, 2-bath single-family, 1,400 finished square feet, asking $185,000, needing roughly $45,000 of work to reach the neighborhood's renovated standard. (Build that budget line by line — the rehab estimating guide and the rehab cost estimator cover that side.) Here's how to turn sold data into an ARV.

Step 1 — pull renovated sales only.Search closed sales within roughly half a mile (a mile in rural areas), sold in the last 3–6 months, same property type, within about 20% of your square footage — and, critically, renovated to the condition you're delivering. A dated sale tells you what your house is worth now, which is a different question. Step 2 — demand at least three, prefer five. With fewer than three true comps, widen the radius or time window before you loosen the renovated-condition filter. Step 3 — compute price per square foot for each comp. Step 4 — adjust for real differences (more on this below). Step 5 — reconcile: average or take the median of the adjusted $/sq ft and multiply by your finished square footage, then sanity-check the result against the comps' raw sale prices.

Our four best comps:

Comp	Sq ft	Sale price	$/sq ft
A — 0.3 mi, sold 6 wks ago	1,450	$262,000	$180.69
B — 0.4 mi, sold 2 mo ago	1,350	$248,500	$184.07
C — 0.2 mi, sold 3 mo ago	1,500	$270,000	$180.00
D — 0.5 mi, sold 5 wks ago	1,380	$255,300	$185.00

The four comps average $182.44 per square foot (the median is $182.38 — when the two agree this closely, no single comp is skewing the answer). Applied to 1,400 finished square feet: 1,400 × $182.44 ≈ $255,400. Round conservatively and call the ARV $255,000— a number that sits comfortably inside the comps' $248,500 to $270,000 range, which is your final sanity check. An ARV that lands above every comp's actual sale price should make you deeply suspicious of your adjustments.

Adjusting comps without fooling yourself

Raw $/sq ft comparisons hide real differences, so appraisers — and you — adjust the comp's sale price before dividing. The usual suspects: a bedroom or bathroom count difference (a second full bath is commonly worth $5,000–$15,000 depending on the market), garage versus no garage, finished basement space (worth roughly half of above-grade $/sq ft in most markets), lot size, and busy-road or backing-to-commercial locations. Adjust the comptoward your subject: if Comp B has one fewer bath than your finished product, add the bath value to B's price before computing its $/sq ft. Two disciplines keep this honest. First, small square-footage differences are already handled by the $/sq ft math — don't double-adjust. Second, beware the smaller-house trap: $/sq ft rises as houses shrink, so a 1,100 sq ft comp will flatter a 1,400 sq ft subject. Stay within that ±20% size band and lean on the comps closest to your size when reconciling.

Here's what an adjustment looks like in practice. Suppose Comp B — the $248,500 sale — has only one and a half baths, while your finished product will have two full baths, and second full baths in this market are worth about $7,500 at resale. Adjust B's price up to $256,000 before dividing: $256,000 ÷ 1,350 = $189.63 per square foot, and the four-comp average moves from $182.44 to about $183.83, nudging the ARV from $255,400 to roughly $257,400. Notice how small that is — a $7,500 adjustment on one of four comps moved the final answer about $2,000. That's the sign of a healthy comp set. When a single adjustment swings your ARV by $10,000 or more, the set is too thin or too scattered to trust, and the fix is better comps, not bigger adjustments.

When comps are thin

In rural markets, unusual property types, or neighborhoods where nothing renovated has traded recently, the textbook method runs out of comps. Widen in this order: extend the sale window to 9–12 months before you extend the radius, because a stale comp in the right neighborhood usually beats a fresh one in the wrong one — but apply a market-trend adjustment to older sales (if the metro is up 4% year over year, a 9-month-old comp gets roughly a 3% bump). Pending sales are the next-best evidence; an investor-friendly agent can often tell you the contract price, and pendings reflect today's market better than anything that closed last quarter. If you're still reconciling from two comps and a prayer, say so in your underwriting: widen your margin of safety from the usual 5–10% ARV haircut to 15%, or pay a few hundred dollars for a pre-purchase appraisal or a broker's price opinion before you commit. One more BRRRR wrinkle worth knowing while you're here: many refinance lenders impose a seasoning period— commonly six months of ownership — before they'll lend against the new appraised value instead of your purchase price, so the ARV you're projecting may not be usable until month six. Budget holding costs accordingly.

Where the ARV feeds the deal math

With ARV pinned at $255,000, the deal numbers fall out fast. Max offer: the 70% rule says 0.70 × $255,000 − $45,000 rehab = $133,500 — a long way below the $185,000 ask, which tells you this property needs a heavy negotiation, a wholesale-style acquisition, or a different strategy than a flip. BRRRR refinance: suppose you negotiate to $150,000, spend the $45,000, and carry $8,000 of closing and holding costs — $203,000 all-in. A 75% LTV cash-out refinance against the $255,000 appraisal produces a $191,250 loan; net of about $4,000 in refi costs you recover $187,250, leaving just $15,750 of your cash in a stabilized rental. Flip profit: sell at $255,000, pay about 8% ($20,400) in commissions and closing, and clear $255,000 − $203,000 − $20,400 = $31,600. Run your own acquisition through the BRRRR calculator to see the refinance and cash-left-in math end to end.

What an ARV miss actually costs

Now hold every cost fixed and let only the appraisal disappoint. Same purchase, same rehab, same $203,000 all-in — the only thing that changes is what the property is actually worth when the work is done:

Actual value vs. $255K ARV	BRRRR cash left in	Flip profit
On target ($255,000)	$15,750	$31,600
5% low ($242,250)	$25,312	$19,870
10% low ($229,500)	$34,875	$8,140
15% low ($216,750)	$44,437	−$3,590

The asymmetry is the lesson. A 10% ARV miss — the difference between a careful comp set and a hopeful one — cuts the flip profit by 74% and more than doubles the cash trapped in the BRRRR. At 15% low, the flip loses money outright even though the renovation went perfectly to budget. Every 5% of ARV error moves the refinance loan by about $9,600 on this deal (75% of the value change), which is exactly why the standard practice is to underwrite at your comp-supported number and then confirm the deal still works at 5–10% below it.

Five ways people get ARV wrong

Comping against unrenovated sales.Mixing dated sales into the set drags the $/sq ft down — or worse, tempts you to "adjust up" by guesswork. Renovated comps only; that's the entire point of the exercise.
Using list prices instead of closed sales. Anyone can ask anything. Only closed prices are evidence, and in a softening market even 6-month-old closings can be stale.
Trusting an automated estimate.Online estimates price the house as it sits today and blend conditions indiscriminately. They're a comp-finding tool, not an ARV.
Comping outside the neighborhood boundary. A school-district line or a highway can move value 15% across one street. Half a mile is a guideline; the boundary is the rule.
Letting the deal set the ARV. If you catch yourself hunting for one more comp to justify the price that makes the deal work, stop — the comps are supposed to discipline the offer, not the other way around.

FAQ

What does ARV mean in real estate?

ARV stands for after-repair value: the price a property will sell for — or appraise at — once the planned renovation is complete. It is not the purchase price plus the rehab budget. It's a forecast of what fully renovated, comparable homes in the same area are actually selling for, applied to your property's size and features. Flippers use ARV to set a maximum offer, and BRRRR investors use it to project the refinance appraisal that determines how much of their cash comes back out.

What is the formula for ARV?

There is no closed-form formula, because ARV is a market forecast, not a computation. The standard method is: pull 3–6 recently sold comps that are already renovated to the level you're planning, compute each comp's price per square foot, adjust for meaningful differences (beds, baths, garage, lot, condition), take the average or median dollars per square foot, and multiply by your property's finished square footage. The common shorthand ARV = average renovated $/sq ft × subject sq ft is the last step of that process — the work is in choosing and adjusting the comps.

Can I use a Zestimate or online estimate as my ARV?

No. Automated estimates price the property in its current condition and blend renovated and unrenovated sales indiscriminately, which is exactly the distinction ARV exists to capture. A distressed house with dated finishes will carry an automated estimate far below its after-repair value, and in a hot market the estimate can also lag closed sales by months. Use online tools to find candidate comps quickly, then do the renovated-only, adjusted comp work yourself — or ask an investor-friendly agent to pull MLS comps.

What's the difference between ARV and appraised value?

ARV is your forecast; the appraisal is the referee's call. On a BRRRR refinance, the lender orders an appraisal after the rehab, and the loan is sized as a percentage of that appraised value — typically 70–75% — regardless of what your spreadsheet said. If your ARV was $255,000 but the appraiser comes in at $235,000, your cash-out loan just shrank by roughly $15,000 and that money stays trapped in the deal. That's why disciplined investors underwrite ARV conservatively and stress-test the deal at 5–10% below their estimate.

The bottom line

ARV is a forecast of an appraisal, built from renovated, recently-closed, truly comparable sales — never from your costs, a list price, or an algorithm's guess. Pull three to six renovated comps inside the neighborhood, adjust them toward your subject, reconcile the $/sq ft, and keep the answer inside the range the comps actually sold in. Then let the number do its three jobs: set the max offer through the 70% rule, size the BRRRR refinance, and cap the flip profit — and confirm the deal survives an appraisal 5–10% below your estimate before you wire a deposit. When the property's endgame is a rental, run the stabilized numbers through the TrueCap analyzer so the ARV, the refinance, and the cash flow all come from one consistent set of assumptions. None of this is investment advice; verify comps, rehab scope, and lender terms on any specific deal before you rely on an ARV.