Estimate ARV with Comps for a Successful Flip

What ARV really means and why comps matter

ARV (after-repair value) is the market value of the property after your planned repairs and upgrades. For a fix-and-flip your ARV determines sale price expectations, lender decisions, and whether the project will actually make money. The most reliable way to estimate ARV is using recent comparable sales (comps) of similar finished homes in the same market.

Step-by-step: build an ARV from comps

1. Define the target finished product clearly: beds, baths, square footage, finishes (mid-range kitchen, hardwoods, tile), and market niche (starter, family, luxury). You will compare apples to apples.
2. Pull 3–6 sold comps that match that finished product. Prioritize SOLD prices over active listings, and aim for sales within 3–6 months and within 0.5–1 mile in typical urban/suburban markets.
3. Normalize the comps for size and features so you can compare on a common metric (often price per square foot, or price per unit for duplexes).
4. Adjust each comp for meaningful differences (bed/bath count, lot, condition, basement, garage) using dollar adjustments you choose consistently.
5. Average the adjusted values to get a base ARV; then run a conservative, realistic, and optimistic scenario.

Worked example: per-sqft approach

Say your subject is a 3-bed, 2-bath, 1,200 sqft house; after rehab you plan mid-range finishes.

You find three sold comps within 0.5 mile and 3 months:

• Comp A: 1,250 sqft, sold for $300,000 → $240/sqft
• Comp B: 1,100 sqft, sold for $280,000 → $254.55/sqft
• Comp C: 1,300 sqft, sold for $315,000 → $242.31/sqft

Average per-sqft = (240 + 254.55 + 242.31) / 3 = ~245.0/sqft

Estimated ARV = 1,200 sqft * $245/sqft = $294,000

Now apply feature adjustments if needed. If Comp B has a fully finished basement and your subject will not, and you estimate that basement adds $10,000, subtract that from Comp B before averaging. If comps have higher-end finishes than you plan, reduce the target per-sqft accordingly (for example -$10–20/sqft depending on the market).

Adjustments and simple math rules

• Use per-sqft for similar-size comps; for large size differences, use dollar adjustments for beds/baths.
• Typical adjustment order: beds, baths, finished basement, garage, lot size, condition/finish level.
• Be consistent: define one dollar value for a half-bath, e.g., hypothetically $8,000, and apply it across comps rather than guessing each time.

Small, consistent adjustments beat random guesses. Document every assumption so you can backtrack if a deal looks off.

Common comp mistakes that sink flip budgets

• Using list prices or pending prices instead of sold prices. List prices are aspirational; sold prices show what buyers actually paid.
• Picking comps outside the market window. A sale 12+ months ago can be meaningless in a rising or falling market.
• Mixing neighborhoods or school zones. A 0.6-mile distance can cross a different micro-market with different buyer demand.
• Relying on too few comps. One or two comps can be outliers; aim for at least three solid sold comps.
• Ignoring condition differences. If your comps are turn-key renovated and you plan lower finishes, your ARV must be lower.
• Using raw price-per-sqft without adjusting for beds/baths or dramatic lot differences. A 3-bed vs a 4-bed can change buyer pool and value materially.
• Forgetting timing and market trend. If prices are rising quickly, use the most recent comps or apply a time adjustment.

Quick sensitivity checks (do not skip)

• Conservative ARV: take the lowest adjusted comp per-sqft and multiply by subject sqft.
• Base ARV: average the adjusted comps.
• Optimistic ARV: use the highest adjusted comp but apply a sanity cap (don’t exceed local neighborhood ceilings).

Then test profitability: subtract rehab cost, holding costs, selling costs, and purchase price. If the margin is thin on the conservative ARV, the deal is risky.

Tools to speed the math

Use a simple ARV calculator to plug comps and adjustments quickly so you can test scenarios. If you want a quick way to run numbers after pulling comps, try DealBumble’s ARV calculator: Run an ARV test.

Final checklist before you commit

• Do you have at least 3 sold comps within 6 months and 1 mile that match your finished product?
• Have you documented and consistently applied all dollar adjustments?
• Did you run conservative and optimistic ARV scenarios and check margins against your exit plan?
• Did you account for market trend and local sales velocity?

Estimate ARV systematically, document every assumption, and stress-test the result. That discipline prevents surprises and keeps flip budgets honest. Run the numbers on your next target and see how the deal shapes up.