Renovation Budget Calculator
Estimates total project cost from area and quality level, splits labour and materials, and applies a contingency scaled to your property's age.
- Construction
- $45,000 ≈55% labour, 45% materials
- Design fees
- $3,600
- Contingency
- $7,470
- · Keep contingency in a separate account so it is not quietly spent on upgrades.
- · Pre-1940 homes should use 20–25% contingency when services are being opened up.
How to use the Renovation Budget Calculator
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01
Measure the floor area included in the project, excluding untouched rooms.
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02
Choose the finish level closest to your intended specification.
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03
Add realistic permit, design and professional fees.
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04
Set contingency for the building age and unknowns, then use the total as a planning range rather than a quote.
Frequently asked questions
How accurate is the estimate?
It is an early budget framework. Location, access, structural work and specification can move real quotes substantially.
What contingency should I use?
Use about 10% for defined work in a newer home, 15–20% when opening walls, and more for older buildings with unknown services.
Does the budget include temporary accommodation?
No. Add moving, storage, accommodation, financing and insurance costs separately where they apply.
Other tools
Paint Calculator
Work out gallons of paint and primer for any room, including doors and windows.
Flooring Calculator
Boxes of flooring needed for any room, with a waste allowance for cuts and pattern.
Tile Calculator
Tiles, grout and adhesive for floors or walls, with breakage allowance.
Wallpaper Calculator
Rolls of wallpaper needed, accounting for pattern repeat.
These calculators give planning estimates based on the figures you enter. They are not a substitute for a site survey, a structural or load calculation, or professional advice. Always confirm quantities with your supplier or contractor before ordering.