How this renovation ROI calculator works
The calculator adds renovation cost, contingency and other project costs. It then subtracts included sale or refinance costs from the expected value uplift and compares the net uplift with the total project cost.
Renovation cost, contingency and value uplift
Contingency shows how overruns can affect the scenario. Expected value uplift is user-entered; the calculator does not use live appraisal data or estimate what a project will add to market value.
Net value uplift vs net gain or loss
Net value uplift is the expected value increase after included transaction costs. Net gain or loss then subtracts the renovation cost, contingency and other project costs from that net uplift.
Break-even value increase
Break-even value increase is the uplift needed to cover renovation cost, contingency and any transaction costs included in the estimate.
Sale and refinance costs
Sale and refinance costs are included only when you choose the matching context and enter the costs. The calculator does not estimate local fees, taxes, lending costs or settlement rules automatically.
What this calculator does not include
This calculator does not replace contractor quotes, valuation advice, permits, tax advice or building guidance. It is a general scenario estimate based on the values entered.
Key terms and assumptionsFormula notes, key terms, source assumptions and limits used in this calculator.
These notes are specific to this calculator. Read the property methodology notes for shared property formulas, region settings and estimate limits.
- Renovation cost
- Renovation cost is the base project cost entered before contingency.
- Contingency
- Contingency is calculated as a percentage of the renovation cost and added to total project cost.
- Value uplift
- Expected value uplift is a user-entered assumption, not a valuation, appraisal or guaranteed resale result.
- Net value uplift
- Net value uplift is expected value uplift after included sale or refinance costs are deducted.
- Break-even value increase
- Break-even value increase is the uplift needed to cover project cost and included transaction costs.
- ROI
- ROI is net gain or loss divided by total project cost, shown as a percentage when that cost is above zero.
- Region settings
- Region settings change defaults, labels and currency formatting only. They do not convert exchange rates or create country-specific results.
- General estimate
- The calculator does not provide building advice, contractor pricing, tax treatment, local compliance checks, valuation advice or investment recommendations.
Guides and methodology
Plain-English notes that explain the assumptions behind related calculators and tools.
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FAQs
What is renovation ROI?
In this calculator, renovation ROI is the estimated net gain or loss divided by total project cost, shown as a percentage when total project cost is above 0.
Does this predict the actual value increase?
No. The expected value uplift is entered by the user. It is not an appraisal, valuation, sale estimate or guarantee.
Why include a contingency?
A contingency shows how cost overruns can affect the result. Leaving contingency at 0 can make the estimate look tighter than it may be in practice.
What is net value uplift?
Net value uplift is the expected value increase after included sale or refinance costs are deducted.
What is break-even value increase?
It is the value uplift needed to cover renovation cost, contingency, other project costs and included transaction costs.
Does this include selling costs or refinance costs?
Only if you choose a sale or refinance context and enter those costs. The calculator does not estimate local fees automatically.
Can the result be negative?
Yes. If the included costs are greater than the expected uplift, the calculator shows an estimated loss.
Is this renovation, financial or property advice?
No. It is a general scenario estimate based on the values entered, not renovation, financial, tax, legal, building, valuation or property advice.