Basement Finishing Cost Calculator
Finishing a basement is priced per square foot, and adding a bathroom or egress window raises the total. Enter the area and finish level.
Most homeowners pay $32,500 to $62,000 for 800 sq ft, midrange.
Your estimate
- Materials and labor
- Add-ons
- Permits
National installed prices, materials and labor included. Your local quotes may differ.
Basement finishing cost by option
Installed totals (based on 800 sq ft), with standard conditions and permits included.
| Option | Typical total |
|---|---|
| Basic | $16,500 to $34,000 |
| Midrange | $32,500 to $62,000 |
| High-end | $60,500 to $98,000 |
Installed price per unit
| Option | Installed price |
|---|---|
| Basic | $20.00 to $40.00 per sq ft |
| Midrange | $40.00 to $75.00 per sq ft |
| High-end | $75.00 to $120 per sq ft |
What drives the price
- MoistureAny water issues must be fixed before finishing, or the new space will be damaged.
- BathroomsAdding plumbing below grade can require an ejector pump.
- EgressA bedroom in a basement usually needs an egress window for code.
- Ceiling heightLow ceilings and ductwork limit layout options.
How this estimate works
The calculator multiplies your basement area by the installed price range for the option you pick, then adds any extras you tick and typical permits. The headline number is the midpoint of your range. Low-end prices fit simple jobs in lower-cost areas. High-end prices fit complex jobs, premium brands and high-cost metros.
Get at least three written quotes before you hire. Ask each contractor to list materials, labor, permits and disposal separately so you can compare them line by line. Read how we build our ranges.
Common questions
How long does basement finishing take?
Many projects take one to three months, depending on scope.
Does a finished basement need a permit?
Most areas require permits for framing, electrical and plumbing.
Can a basement be a bedroom?
It generally needs an egress window and meets other code requirements. Check local rules.
Sources and method
Price ranges are national installed estimates maintained by the HouseMath editorial team and last reviewed September 2026. For the labor side of the job, see the U.S. Bureau of Labor Statistics Occupational Employment and Wage Statistics data for drywall and ceiling tile installers (SOC 47-2081), which shows how trade wages differ by state.