How is ARV calculated in real estate?

ARV is calculated by finding 3–5 comparable sold properties within 0.5–1 mile, built within 10 years of your subject property, with similar size and condition. Divide each comp's sale price by its square footage, average the results, then multiply by your property's post-renovation square footage.

What's the difference between ARV and current market value?

Current market value (as-is value) is what the property is worth in its present condition. ARV is what it will be worth after renovations are complete. Investors use ARV — not current value — to calculate their maximum offer price and project their profit margin.

Can I use Zillow or Redfin to calculate ARV?

Zillow and Redfin are good starting points since they show recent sold prices, but they lack the precision needed for professional ARV calculations. Experienced investors use MLS data (via a real estate agent) or data platforms like PropStream, which provide better comp filtering by square footage, condition, and proximity.

How accurate does ARV need to be?

Your ARV estimate should be within 5–10% of the actual sale price to make a profitable deal. A 15–20% error in ARV can easily wipe out your entire profit margin. Always use the conservative end of your comp range and verify with a trusted local agent before making an offer.

How to Calculate ARV in Real Estate (Step-by-Step)

After Repair Value is the single most important number in fix-and-flip and BRRRR investing. Overestimate it and you lose money before the project starts. Here's how professionals calculate it.

What is ARV?

ARV (After Repair Value) is the estimated market value of a property after all planned renovations are complete. It's the number your entire deal analysis is built on — your maximum purchase price, your expected profit, and your refinance proceeds all flow from ARV.

If your ARV is too high, every calculation downstream is wrong. You'll overpay, underestimate your cost basis, and potentially lose money even after a successful renovation.

How ARV is Determined

ARV is based on comparable sales (comps) — recently sold properties that are similar to your subject property in the same or adjacent neighborhood. This is the same methodology that appraisers, real estate agents, and lenders use.

The key phrase is "after repair" — you're not comparing to other distressed properties. You're comparing to fully renovated, move-in-ready homes. Your ARV represents what your property will be worth once it looks like those comps.

Step-by-Step: How to Calculate ARV

Step 1: Define the Subject Property

Document the key characteristics of your property that affect value:

Square footage (above grade)
Bedroom and bathroom count
Lot size
Garage (yes/no, attached/detached)
Year built
Style (ranch, colonial, split-level, etc.)
Basement (finished/unfinished)

Step 2: Find Comparable Sales

Search for properties that sold in the last 3–6 months (maximum 12 months in slow markets) with these filters:

Location: Within 0.5–1 mile of subject (tighten in dense urban areas, loosen in rural)
Size: Within 20% of subject square footage
Bedrooms/Bathrooms: Same or 1 off
Condition: Renovated or fully updated — not distressed
Style: Similar property type where possible

Find comps using MLS access (through a real estate agent), Redfin, Zillow recently sold, or PropStream. Target 3–5 good comps minimum. Fewer than 3 and your confidence drops significantly.

Step 3: Calculate Price Per Square Foot

For each comp, calculate the sold price ÷ above-grade square footage. This gives you a price-per-sqft baseline.

Example comps on a 1,400 sqft subject property:

Comp 1: 1,350 sqft, sold $190,000 → $140.74/sqft
Comp 2: 1,500 sqft, sold $205,000 → $136.67/sqft
Comp 3: 1,380 sqft, sold $195,000 → $141.30/sqft
Average: $139.57/sqft

Step 4: Apply Adjustments

Raw price per sqft is a starting point, not a final answer. Adjust each comp for meaningful differences:

Extra bathroom: +$5,000–$10,000 if comp has one more
Garage: +$8,000–$15,000 for attached garage
Finished basement: Typically 40–60% of above-grade $/sqft
Lot size: Matters more in suburban/rural markets
Age of updates: A kitchen updated in 2023 vs. 2015 is different

Adjustments are somewhat subjective and vary by market. This is where local market knowledge matters. An experienced local agent or appraiser can calibrate your adjustments. The BiggerPockets ARV guide goes deeper on regional adjustment factors if you want a reference point.

Step 5: Calculate Your ARV

Apply the adjusted $/sqft to your subject property's square footage:

$139.57 × 1,400 sqft = $195,398 ARV

Round to a conservative number: $190,000–$195,000 ARV range.

When in doubt, use the conservative end of the range. It's far better to set a conservative ARV and get a pleasant surprise than to set an optimistic ARV and discover it at closing.

Common ARV Mistakes

Using active listings instead of closed sales. Listings are asking prices — closed sales are what buyers actually paid.
Selecting comps too far away. Neighborhoods can change within a few blocks. A comp half a mile away in a different school district isn't valid.
Comparing renovated to non-renovated. If the comp was sold as-is, it's not a valid ARV comp — it's an as-is comp.
Ignoring days on market. A comp that sat for 180 days may have sold below market. Weight fresh, fast sales more heavily.
Using Zestimate as ARV. Automated valuations are useful for a rough sense of range but not accurate enough to underwrite a purchase.

What To Do With Your ARV

Once you have a reliable ARV, plug it into the 70% rule to find your Max Allowable Offer (MAO):

MAO = (ARV × 0.70) − Estimated Rehab Costs

Using our example: ($ 195,000 × 0.70) − $35,000 = $101,500 MAO

If the seller wants $120,000, the deal doesn't work. If they'll accept $95,000, you have a deal worth pursuing.

Using AI and Data Tools to Calculate ARV

Manually pulling and analyzing comps is time-consuming, especially when you're reviewing dozens of potential deals per week. AI-powered tools can automate comp selection, apply adjustments, and deliver an ARV estimate in seconds — with a confidence score based on the quality of available data.

The best practice is to use an automated tool for initial screening, then verify the top candidates manually before making an offer. This lets you move fast without sacrificing accuracy on the deals that matter.