How to Calculate After Repair Value (ARV): The Investor's Guide

After repair value — ARV — is the most important number in any fix-and-flip or BRRRR deal. It is the estimated market value of a property after all planned renovations are complete. Every other number in your deal analysis depends on the ARV: your maximum allowable offer, your rehab budget, your expected profit margin, and your refinance amount. Get the ARV right, and your deal analysis is built on solid ground. Get it wrong — even by 10 percent — and a deal that looks profitable on paper becomes a money pit in reality.

Calculating ARV is both an art and a science. The science is the comparable sales analysis — a structured process for identifying recently sold properties similar to what yours will become after renovation. The art is in the adjustments — accounting for the differences between your subject property and the comps in ways that reflect what buyers in your market will actually pay. This guide teaches both.

The Comparable Sales Method

The comparable sales method — the same method appraisers use — is the foundation of ARV calculation. You are answering one question: what have similar properties in similar condition in similar locations sold for recently? The key word is "similar." Your comps must resemble what your property will look like after renovation — not what it looks like now. You are not comping a distressed property against other distressed properties. You are comping a renovated property against other renovated properties that have recently sold.

Step 1: Find Comparable Sales

Start by searching for recent sales within a half-mile radius of your subject property. Use the MLS (through a real estate agent), Zillow, Redfin, or PropStream. Filter for properties that match your post-renovation property on these criteria: similar square footage (within 20 percent), similar bedroom and bathroom count (exact match preferred), similar lot size (within 25 percent for SFRs), similar property type (single-family, duplex, condo), and similar condition (renovated or updated, not distressed). Target 3 to 5 strong comps that sold within the last 3 to 6 months. In active markets, prioritize the most recent sales. In slower markets, you may need to extend to 6 to 12 months.

Step 2: Make Adjustments

No two properties are identical. You need to adjust each comp's sale price to account for differences between the comp and your subject property. The standard adjustments are: square footage (add or subtract $40 to $100 per square foot depending on market — if the comp is 200 square feet larger, subtract the adjustment from the comp price), bedrooms (add or subtract $5,000 to $15,000 per bedroom depending on market), bathrooms (add or subtract $5,000 to $10,000 per bathroom), garage (add $10,000 to $25,000 for a 2-car garage versus no garage), lot size (typically minimal adjustment for standard residential lots), condition and finish quality (the most subjective adjustment — $5,000 to $30,000 depending on the gap), and location within the neighborhood (corner lots, busy streets, backing to commercial get negative adjustments).

After adjustments, each comp's adjusted sale price should represent what the comp would have sold for if it were identical to your post-renovation subject property. If your 3 adjusted comps come in at $245,000, $252,000, and $248,000, your ARV estimate is approximately $248,000 (the average or median of the adjusted prices). If the adjusted prices are widely spread — $220,000, $260,000, $285,000 — your comps are not similar enough, and you need better ones.

Step 3: Validate with Active Listings

After establishing your ARV from sold comps, check active listings (currently for sale) in the area. Your ARV should be at or below the price of comparable active listings. If similar renovated properties are currently listed at $240,000 to $250,000 and your ARV estimate is $275,000, something is wrong — either your comps are not representative, your adjustments are too aggressive, or the market has shifted since the most recent sales. Active listings represent the ceiling of what you can reasonably expect a buyer to pay.

The 70 Percent Rule

The 70 percent rule is the standard quick-calculation formula for determining your maximum allowable offer (MAO) on a flip or BRRRR deal: MAO = (ARV × 0.70) − Rehab Costs. If your ARV is $250,000 and your estimated rehab cost is $40,000, your maximum offer is ($250,000 × 0.70) − $40,000 = $135,000. The 30 percent margin covers your closing costs (buying and selling), holding costs, financing costs, and profit. Run the full analysis in our fix and flip calculator to model every cost line rather than relying solely on the 70 percent shortcut.

Common ARV Mistakes

Overestimating ARV is the number one mistake that causes investors to lose money on flips. The most common errors include using comps that are too far away (a comp across a highway or in a different school district may not be comparable even if it is close geographically), using comps that are too old (in a declining market, 6-month-old comps may overstate current values), over-improving for the neighborhood (installing $50,000 kitchens in a $200,000 neighborhood does not increase ARV proportionally), using listing prices instead of sold prices (what a seller asks and what a buyer pays are different things), and ignoring market trends (if prices are declining 1 percent per month, your ARV needs to reflect where the market will be when you list, not where it is today).

ARV for BRRRR Deals

In a BRRRR deal, the ARV determines your refinance amount. Most lenders will refinance at 70 to 75 percent of appraised value. If your ARV is $250,000 and the lender refinances at 75 percent LTV, your new loan is $187,500. If your total investment (purchase + rehab + closing costs) was $175,000, you recover $12,500 cash plus you keep the property with $62,500 in equity. If your ARV estimate was wrong and the property only appraises at $220,000, the refinance only yields $165,000 — leaving $10,000 of your capital trapped in the deal. Use our BRRRR calculator to model different ARV scenarios and see how they affect your capital recovery.

Building ARV Accuracy Over Time

The best investors develop deep market knowledge that makes ARV estimation more accurate over time. They focus on specific neighborhoods or ZIP codes rather than broad markets. They track every sale in their target area — not just when they are actively analyzing a deal. They develop relationships with real estate agents who provide real-time market intelligence. They attend open houses of renovated properties to understand what finishes buyers expect and what they pay for. And they track their own ARV estimates against actual outcomes — comparing their projected ARV to the actual sale price or appraisal on every deal. This feedback loop is how you calibrate your ARV skills from educated guessing to reliable estimation.