Homeowner tool
Home Improvement Budget Calculator
Turn a rough project cost into a realistic budget — with the design fees, permits, and contingency that most estimates leave out.
Project details
- Construction after finish level and DIY—
- Design and drawings—
- Permits and inspections—
- Contingency—
- Likely low end—
- Likely high end—
Estimates are for planning only. Renovation pricing varies enormously by region, trade availability, and site conditions. Always obtain at least three itemized bids on an identical written scope before committing to a budget.
How this calculator works
- Your base estimate is adjusted by a finish-level multiplier, since materials and fixtures drive much of the variance between similar projects.
- DIY participation reduces the labor share by a modest amount — realistic, because homeowners typically take on the lower-skill portions.
- Design and permit percentages are applied to the adjusted construction cost.
- Contingency is applied last, to the full subtotal, because overruns scale with the whole project.
Frequently asked questions
How much should I budget for contingency?
Fifteen percent for straightforward work in newer homes; twenty percent or more for older homes and anything involving structure or opening walls.
Why is my contractor's bid so different from this?
Regional labor rates, site access, existing conditions, and scope interpretation all vary. Use this to sanity-check a bid, not to replace one.
Disclaimer. Estimates are for planning only. Always obtain three itemized bids on an identical written scope.