Home Addition Cost Estimator
Estimate home addition costs by square footage, stories, and finish level for faster project quotes.
Addition Size
Build Details
Pricing
Project Summary
Addition Size: 400 sq ft
1-story, mid finish
Ready to quote this job?
Turn these numbers into a professional estimate or invoice in seconds.
No credit card required
Enter the square footage to add, number of stories, and finish level. Adjust the per-square-foot rate to reflect foundation, framing, and finish scope in your market.
When Should You Use This Calculator?
- Quoting room and bump-out additions
- Estimating second-story additions
- Building budget ranges for homeowners
- Comparing basic vs high-end finishes
After you land on a number, run it through our markup calculator or profit margin calculator to confirm the job is worth taking.
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