The ARV Formula: How to Calculate After-Repair Value Accurately

What ARV Is (and Isn't)

After-Repair Value is the estimated market value of a property after all necessary repairs and cosmetic updates have been completed to a standard consistent with the neighborhood. It is not:

• The highest sale price ever recorded in the neighborhood
• The Zestimate or automated valuation — these are notoriously inaccurate for distressed properties
• What you think it should be worth after you put lipstick on it
• A certified appraisal (though a certified appraisal is the gold standard for your ARV estimate)

ARV is the price a retail buyer would pay for a fully renovated version of your property in today's market. The word "today" matters — use only recently closed comps.

Step 1: Define Your Comparable Selection Criteria

Start with these hard filters before selecting comps:

• Geographic proximity: Same neighborhood, within 0.5 miles for urban markets; up to 1 mile for suburban. Never cross major barriers (highways, waterways, school district lines) without adjusting
• Recency: Closed within the last 90 days. In fast-moving markets, 60 days is better. Never use sales older than 6 months without a time-adjustment factor
• Property type match: Single-family to single-family, condo to condo (same building or same complex class). Mixing types destroys accuracy
• Condition: Use only fully renovated or move-in-ready sales as ARV comps. Distressed sales, as-is sales, and fixer-uppers will pull your ARV down — they belong in your as-is value analysis, not ARV
• Size range: Within ±25% of your subject property's square footage

Step 2: Calculate Adjusted Price Per Square Foot

Pull 3–5 qualifying comparables. For each, calculate the price per square foot and then adjust for the key differences:

After adjustments, you should have 3–5 adjusted values clustering within 5–10% of each other. If they're wildly spread, your comp selection is off — revise your filters.

Step 3: Weight and Conclude

Weight your comps by similarity to the subject. The most similar comp (closest to subject in size, location, condition, and age of sale) gets the most weight. A simple approach:

• 3 comps: Most similar = 50% weight, other two = 25% each
• 5 comps: Most similar = 30% weight, next two = 25% each, remaining two = 10% each

Round to the nearest $5,000. This is your ARV estimate.

The Most Common ARV Mistakes

Mistake 1: Using Distressed Comps as ARV

If you pull comps from distressed sales (foreclosures, probate, as-is investor flips), your ARV will be understated — and you'll underbid. Use only fully renovated, market-rate sales.

Mistake 2: Cherry-Picking the Highest Sales

The outlier $750K sale in a neighborhood that averages $480K might be a different street, a different view, or a unique buyer. One outlier doesn't establish market value. Weight your comp cluster, not your optimism.

Mistake 3: Assuming Appreciation

In South Florida 2020–2022, many investors assumed 10–15% annual appreciation in their ARV. That worked while it lasted. It doesn't work in flat or declining markets. Use comps that closed recently; don't project forward appreciation.

Mistake 4: Ignoring Micro-Location Differences

In dense urban markets like Miami, two blocks can represent a 20–30% value difference. A comp that's 0.4 miles away but across a rail line, in a different school district, or on a busier street is not an equivalent comp. Know your micro-geography.

ARV in South Florida: Market-Specific Notes

• Flood zone impact: AE vs. X flood zone can represent 5–15% of value. Confirm the flood zone of both the subject and the comps
• HOA buildings: Condos in buildings with pending litigation or failed milestone inspections have suppressed comps — don't use them for non-impaired buildings
• Insurance availability: If a ZIP code has lost major carriers, check whether retail buyers can insure the property at a reasonable cost — this affects ARV
• Seasonal market: Miami-Dade's luxury segment is highly seasonal (Jan–April is peak); use same-season comps where possible

Get an AI-Generated ARV

Marcus's BPO & Valuation Report produces a full ARV analysis for any South Florida property — including 3 ARV comps with adjustments, 3 as-is comps, estimated rehab costs, and the calculated maximum allowable offer.