Home Renovation Cost Calculator
Full cost of a home renovation project.
Calculate total home renovation cost including materials, labour, permits, and contingency reserve. Enter permits & inspections and see the result instantly.
What this tool does
Enter materials, labour, permits, and other costs. The tool totals project cost plus a contingency reserve.
Enter Values
Formula Used
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Disclaimer
Results are estimates for educational purposes only. They do not constitute financial advice. Consult a qualified professional before making financial decisions.
Home renovation projects run over budget 60-80% of the time. A 20,000 kitchen with 15,000 materials, 5,000 labour, 500 permits ends at 20,500 on paper — and 24,500 after 20% contingency for the inevitable surprises. Plumbing issues, electrical updates to meet code, delivery delays costing extra labour — all common. Starting with contingency built in prevents painful mid-project conversations about cost.
A worked example
Try the defaults: materials of 15,000, labour of 5,000, permits & inspections of 500, other direct costs of 0. The tool returns 24,600.00. You can adjust any input and the result updates as you type — no submit button, no reload. That's the real power here: seeing how sensitive the output is to one or two assumptions.
What moves the number most
The result responds to Materials, Labour, Permits & Inspections, and Other Direct Costs. Frequency and unit price pull the total in different directions. The biggest surprise for most people is how small recurring amounts compound into large annual figures — that's where this calculation earns its keep.
The formula behind this
Direct costs summed plus 20% contingency. Industry-standard contingency ranges 10-20% depending on project complexity. Everything the calculator does is shown in the formula box below, so you can check the math against your own spreadsheet if you want.
When the result says "wait"
If the payback is longer than you expect to keep the item, the math says no. That's useful information — not everything has to earn its keep financially, but knowing when something doesn't means the decision to buy it anyway is deliberate.
What this doesn't capture
Purchase decisions rarely come down to payback alone. Reliability, time saved, enjoyment, and alternatives outside the calculation all matter. The figure gives you the money side cleanly so you can weigh it against everything else honestly.
Home renovation cost produces a total based on the inputs provided.
Inputs
This example uses typical values for illustration. Adjust the inputs above to match a specific situation and see how the result changes.
Sources & Methodology
Methodology
Direct costs summed plus 20% contingency. Industry-standard contingency ranges 10-20% depending on project complexity.
Frequently Asked Questions
Why 20% contingency?
Does this include design fees?
VAT / sales tax?
Can I reduce contingency?
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