ARV Calculator – After Repair Value

What this calculator estimates

After repair value, usually shortened to ARV, is an estimate of what a property could be worth after a defined renovation is complete. This calculator also applies an investor purchase rule to estimate a maximum bid and shows the profit buffer retained inside the projected finished value. It is designed for quick screening of renovation or house-flip opportunities, not as a substitute for an appraisal, contractor bid, inspection, title review, or financing analysis.

The default example starts with a $100,000 as-is value, assumes renovations add $50,000 of market value, uses a $25,000 renovation budget, and applies a 70% purchase rule. That produces a $150,000 ARV, a maximum bid of $80,000, and a $45,000 target profit buffer. The buffer equals 30% of ARV before other project costs.

Input guide

• ARV method: Choose “Current value + uplift” when you have a defensible as-is value and a separate estimate of how much the completed work will add. Choose “Comparable price × area” when renovated comparable properties support a market price per square foot or square meter.
• Property's current value: Enter the current as-is market value, not the seller's asking price unless the asking price is also your best market estimate. A higher current value raises ARV under the current-value method.
• Value added by renovations: Enter the expected increase in market value, which is different from renovation cost. Spending $50,000 does not automatically create $50,000 of added value. Overestimating this field is one of the most consequential ARV errors.
• Comparable price per area: Use the average or carefully adjusted price of recently sold, renovated properties that are similar in location, size, condition, layout, and quality. Higher comparable pricing directly increases ARV.
• Total property area: Enter the area to which the comparable price applies. Avoid mixing gross building area, finished living area, lot area, and rentable area.
• Area unit: Switching between square feet and square meters converts the area and per-area values so the underlying economics stay unchanged.
• Investor purchase rule: This is the percentage of ARV allowed for the combined acquisition and renovation cost. A lower percentage creates a larger margin but usually lowers the maximum bid. A higher percentage makes the offer more competitive but reduces the profit buffer.
• Renovation cost method: Enter a direct total when you have a contractor estimate or detailed scope budget. Use cost per area for early-stage screening. Include labor, materials, permits, design, demolition, waste removal, and contingency where relevant.
• Repair cost per area and area requiring repairs: These fields multiply to produce total renovation cost. Use only the area included in the scope. A whole-house cost rate applied to a partial renovation can materially overstate the budget.

Formulas and result interpretation

The after repair value is the projected finished value. The maximum bid price is the amount left for acquisition after reserving the renovation cost inside the selected rule percentage. A negative maximum bid means the renovation budget already exceeds the rule-based project-cost allowance; the model then shows zero as the practical bid floor while preserving the shortfall in the calculation detail.

The target profit buffer is the portion of ARV not assigned to acquisition and renovation under the selected rule. In this model, it is expressed as a percentage of ARV to match the purchase-rule framework. It is not the same as return on cash invested, annualized return, or accounting ROI. The acquisition + renovation result is the rule-based cost ceiling, and the renovation-cost result confirms whether the direct or per-area method is active.

Reading the chart and table

The allocation chart divides ARV into maximum bid, renovation cost, and target profit buffer. The three amounts should add back to ARV whenever the maximum bid is nonnegative. The data table beneath the chart provides the exact amounts and percentages represented by the colored segments. The calculation-detail table shows each formula step, making it easier to audit assumptions or transfer them into a more complete acquisition model.

When assumptions are cleared, the chart changes to a compact empty state rather than drawing a meaningless ring. When one category contains the full value, the chart is explicitly labeled as a 100% allocation and the table still exposes the exact amount.

Practical limits and common mistakes

ARV is highly sensitive to comparable selection and renovation quality. Compare properties with similar micro-location, usable area, bedroom and bathroom count, parking, lot characteristics, and finish level. Distressed sales, unusually favorable financing, seller concessions, and stale listings may distort a simple price-per-area average.

The purchase rule does not automatically reserve every real project expense. Review closing and settlement charges using the Consumer Financial Protection Bureau's closing-cost guidance. Renovation financing may also impose eligibility, appraisal, contractor, and draw requirements; examples include the U.S. Department of Housing and Urban Development's FHA 203(k) program and Fannie Mae's HomeStyle Renovation guidance. For appraisal terminology and professional standards, consult The Appraisal Foundation.

Common mistakes include treating renovation cost as value added, using asking prices instead of closed-sale evidence, mixing square feet and square meters, omitting contingency, ignoring financing and holding periods, and assuming the rule percentage is universally appropriate. Stress-test both ARV and renovation cost before making an offer.