How to Calculate ARV (After Repair Value)

When you walk into a property, the first question that pops into every flipper’s head is, “What will this house be worth once the drywall is up, the kitchen is modern, and the yard is tidy?” That number is the After‑Repair Value, or ARV. It is the cornerstone of every profit model, the target that tells you whether a deal is a flip or a flop. Yet many investors treat ARV as a guess, a feeling, or a number pulled from the MLS listing. In reality, ARV is a calculated estimate based on hard data—specifically, recent sales of truly comparable properties, or “comps.”

In this guide we will walk through every step of a rigorous ARV calculation, using a single worked example that mirrors a typical three‑bedroom, two‑bath flip in a mid‑size U.S. market. All numbers come from that example; we will not introduce any new figures. By the end you will have a repeatable process you can copy into the House Flip Analyzer spreadsheet, and you will understand the pitfalls that cause ARV to balloon beyond reality.

What ARV is, and what it is not

ARV stands for After Repair Value. It is the estimated market price of a property after you have completed all renovations, upgrades, and cosmetic fixes. It is not the asking price, the seller’s expectation, or the price you paid for the property. ARV is derived from the sales prices of comparable properties that have already been repaired and sold in the same neighborhood, within a recent time window (typically six months). Because the market is fluid, ARV should be treated as a range rather than a single point. In our example the range is $255,000–$268,000, with $265,000 as the weighted estimate we will settle on.

Picking comps: the four rules

Choosing the right comps is half the battle. Follow these four rules to keep the data clean:

1. Timeframe: Use sales that occurred within the last six months. Market trends shift quickly; older sales embed outdated pricing.
2. Proximity: Stay within a half‑mile radius of the subject. Neighborhood micro‑markets can differ dramatically block by block.
3. Physical similarity: Match bedroom, bathroom, and square‑footage characteristics as closely as possible.
4. Condition parity: Use properties that were sold after a full renovation, not “as‑is” sales, to ensure the price reflects a move‑in ready home.

Our three comps all satisfy these rules: each sold within six months, all within 0.5 miles, each is a 3‑bed/2‑bath, and each was renovated before sale.

The adjustments table

Even with strict comp selection, small differences remain—size, finish level, or lot quirks. Adjustments translate those differences into dollar amounts that bring each comp onto the same playing field as the subject.

Explanation of adjustments:

• Comp 1 is 50 sqft smaller than the subject. We subtract $5,000 to reflect the size gap.
• Comp 2 is 50 sqft larger *and* finished with higher‑grade fixtures. We subtract $8,000 to bring it down to the subject’s expected finish level.
• Comp 3 matches the subject perfectly on size and finish, so no adjustment is needed.

Weighting the comps into one ARV

The simple average gives a quick sense of market value, but not every comp carries the same relevance. Comp 3 is an exact match, so we give it the heaviest weight. A common approach is to assign 50 % weight to the exact match, and split the remaining 50 % between the other two comps.

Rounding to a clean figure, we present the weighted ARV as $265,000. This number respects the exact match while still reflecting market breadth.

The $/sqft cross‑check

Another sanity check is price per square foot. Divide the weighted ARV by the subject’s square footage:

Now compare to each comp’s $/sqft:

• Comp 1: 255,000 ÷ 1,400 ≈ 182 $/sqft (after adjustment)
• Comp 2: 267,000 ÷ 1,500 ≈ 178 $/sqft (after adjustment)
• Comp 3: 268,000 ÷ 1,450 ≈ 185 $/sqft

The subject’s $183/sqft sits neatly between the adjusted comps, confirming that the weighted ARV is not an outlier.

From ARV to a maximum offer

With ARV in hand, the next step is to determine how much you can safely pay for the property. The industry‑standard “70 % Rule” subtracts the rehab budget from 70 % of ARV:

Thus, the highest price you could pay while preserving the 70 % buffer is $140,500. If you acquire the property for more, the buffer disappears and profit margins shrink dramatically.

The mistakes that inflate ARV

Even with a disciplined process, investors can unintentionally overstate ARV. Below are the most common traps:

• Using comps that are not truly renovated, which depresses the adjusted price and forces an upward ARV correction.
• Failing to adjust for square‑footage differences, especially when the subject is larger than the comps.
• Applying a simple average without weighting the most comparable sale, which dilutes the impact of the best match.
• Skipping the $/sqft cross‑check, allowing a single outlier to skew the final number.
• Relying on outdated sales (older than six months) that do not reflect current market momentum.

ARV vs list price

The listing price you see on the MLS is a seller’s starting point, not a prediction of what the property will fetch after work is done. In our example the adjusted comparable sales sit at $255,000, $267,000, and $268,000. Those three figures tell a story about what buyers have actually paid for similar homes in the same condition, and they set the realistic ceiling for any after‑repair value. Treat the list price as a negotiation anchor, not a forecast.

When you line those comps up, the simple average comes out to $263,333, while a weighted approach nudges the ARV to $265,000. That puts the likely resale window somewhere between $255,000 and $268,000. Knowing this range lets you frame your offer with confidence: you can justify a bid that sits below the low end of the range while still leaving room for profit, because the market data backs it up.

Subtract the rehab budget of $45,000 from the weighted ARV and you land at a maximum allowable offer of $140,500, the number derived from the rule that caps investment at a safe percentage of the after‑repair value. This MAO becomes your hard stop in negotiations, ensuring you never overpay based on an optimistic list price that isn’t grounded in the actual comp data.

Run your own numbers

This exact walkthrough is the sample pre-loaded in our House Flip Analyzer spreadsheet. The free Lite version runs the full first pass on one sheet — profit, cash invested, ROI, break-even price and the 70% rule verdict. The Full version adds the sensitivity grid, the category rehab budget with live actuals from an expense log, contractor quote comparison, change orders, payments tracking and a project dashboard — 17 sheets that carry the deal from screening through the sale.

This guide is an educational calculation aid, not financial, tax, or legal advice. Verify all figures against local data and consult licensed professionals before purchasing any property.