Only include known amounts. This is not legal or permit advice.
Optional comparison amount.
Extra buffer for unknowns, changes or project variation.
More cost categories and stress test
Optional stress-test increase on base costs.
Result updated. Estimated budget: $20,700.
Result summary
Renovation budget
Main project estimate from the values entered.
$20,700
This is a planning estimate for base costs, contingency and a simple overrun scenario.
Key numbers
- Base cost
- $18,000
- Budget difference
- Not entered
Key takeaway
The estimate totals about $20,700, including $2,700 for contingency.
Project details
Budget details
- Base cost
- $18,000
- Contingency
- $2,700
- Budget difference
- Not entered
- Overrun scenario
- $20,700
- Estimated budget
- $20,700
- Status
- Estimate available
Check these assumptions
- This is a general budgeting worksheet, not a quote or cost guarantee.
Save or share this result
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How this renovation budget calculator works
The calculator sums the cost categories entered, adds contingency as a percentage of base cost, and optionally compares the estimate with an available budget.
Assumptions
Costs come from the values entered. Contingency and overrun fields are planning assumptions only, not guarantees, quote adjustments or advice.
What this calculator does not include
This calculator does not estimate local labour rates automatically, provide permit, tax, legal, accounting or investment advice, or replace project quotes.
Key terms and assumptionsShort notes about base cost, contingency, overrun scenarios and estimate limits.
- Base cost
- Base cost is the sum of the entered cost categories before contingency.
- Contingency
- Contingency is calculated as a percentage of the base cost.
- Overrun scenario
- The optional overrun scenario stress-tests base costs before adding contingency.
- No cost guarantee
- Results are rough budgeting estimates only and do not replace quotes or professional review.
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FAQs
How does the renovation budget calculator work?
It sums entered cost categories, adds the selected contingency and can compare the result with an available budget.
What is contingency?
Contingency is an extra allowance for unknowns, changes or project variation.
Does this estimate labour rates?
No. Enter known quotes or your own estimates. The calculator does not infer local labour rates.
Does this include permits?
Only if you enter permit or fee amounts. It does not provide legal, permit or tax advice.
Is this a quote?
No. It is a general budgeting worksheet, not a quote, guarantee or advice.
Can I compare against my budget?
Yes. Enter an available budget to show an estimated surplus or shortfall.