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Renovation Value and Bid Budget

Estimate post-renovation value and an investor-rule purchase budget after repair costs.

Formula & worked example
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How to use this calculator

Enter the known values in the units shown. Results update as you type.
Where results are editable, change one to solve backwards. Lock a value to hold it fixed.
Use the worked example to check the method. Reset restores the starting fields.

Use the result with context

Results are estimates for planning and education. Confirm rates, taxes, fees, and legal requirements with the relevant institution or a qualified professional before making a financial decision.

Formula and method

Current value of 100000 plus renovation value of 50000 gives 150000 after repair. At a 70% purchase rule less 20000 repair cost, the modeled maximum bid is 85000.

After-repair value = current value + added value; bid = ARV × purchase-rule percentage − repair cost.

Worked example

Enter these known values and leave the other values blank.

Property's current value: 100000 USD
Value of renovations: 50000 USD
Total cost of renovation: 20000 USD
Investors purchase rule: 70 %

After repair value (ARV): 150000 USD
Maximum bid price: 85000 USD
Value less bid and repairs: 45000 USD
Surplus as share of after-repair value: 30 %

Assumptions and limitations

Added property value and repair cost are separate assumptions. Repairs need not increase market value by their cost.
The displayed surplus equals ARV minus purchase budget and repairs; its percentage uses ARV as denominator, so it is not a conventional invested-capital ROI.
The purchase rule is an editable heuristic. Closing, financing, holding, resale and tax costs are excluded.
Amounts use a single consistent currency. Currency selector conversion factors are a captured static snapshot; they are not current FX quotes.
Clear the unknown field before solving an inverse. Locks keep known values fixed; contradictory locked values require correction.
Repair rates, repair areas and total repair cost must be nonnegative. The current property value is locked by default; unlock it before solving that inverse.
Domain review limits calculations to the documented finite scenario; original captured equations, inverses and unit options are retained.

Common questions

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