United States calculator
Basement Finishing Cost Calculator
Estimate the cost to finish a basement. Adjust the finished area, the finish grade, and whether you add a full bathroom, an egress window, or perimeter waterproofing to see an itemized low-high range for your project.
How this calculator is built
Unit costs with sources
This model cites 6 sources across line-item unit costs, regional labor data, and tax references.
Regional labor adjustment
The state table applies local labor indexes only to labor-heavy line items.
Published methodology
The methodology page lists the formula, size drivers, labor model, and source links.
Estimate your project
Change the default inputs to match your scope. The breakdown updates by line item.
Basement Finishing Cost by state: typical ranges
Each range applies that state's labor index to the labor-share line items of the default project; materials stay at national prices. Select a state for its full local breakdown and calculator.
| State | Typical range | Labor index | Permit |
|---|---|---|---|
| Alabama | $13,943–$28,958 | 75% | Likely |
| Alaska | $19,122–$39,714 | 123% | Likely |
| Arizona | $15,561–$32,319 | 90% | Likely |
| Arkansas | $14,266–$29,630 | 78% | Likely |
| California | $18,798–$39,042 | 120% | Likely |
| Colorado | $16,748–$34,784 | 101% | Likely |
| Connecticut | $17,180–$35,681 | 105% | Likely |
| Delaware | $16,208–$33,664 | 96% | Likely |
| Florida | $14,482–$30,078 | 80% | Likely |
| Georgia | $14,158–$29,406 | 77% | Likely |
| Hawaii | $20,201–$41,955 | 133% | Likely |
| Idaho | $15,022–$31,199 | 85% | Likely |
| Illinois | $19,014–$39,490 | 122% | Likely |
| Indiana | $16,532–$34,336 | 99% | Likely |
| Iowa | $15,345–$31,871 | 88% | Likely |
| Kansas | $15,669–$32,543 | 91% | Likely |
| Kentucky | $14,914–$30,974 | 84% | Likely |
| Louisiana | $14,374–$29,854 | 79% | Likely |
| Maine | $16,208–$33,664 | 96% | Likely |
| Maryland | $17,180–$35,681 | 105% | Likely |
| Massachusetts | $18,906–$39,266 | 121% | Likely |
| Michigan | $16,101–$33,440 | 95% | Likely |
| Minnesota | $17,395–$36,129 | 107% | Likely |
| Mississippi | $13,943–$28,958 | 75% | Likely |
| Missouri | $16,532–$34,336 | 99% | Likely |
| Montana | $15,669–$32,543 | 91% | Likely |
| Nebraska | $14,914–$30,974 | 84% | Likely |
| Nevada | $17,287–$35,905 | 106% | Likely |
| New Hampshire | $16,424–$34,112 | 98% | Likely |
| New Jersey | $17,719–$36,801 | 110% | Likely |
| New Mexico | $15,345–$31,871 | 88% | Likely |
| New York | $18,366–$38,146 | 116% | Likely |
| North Carolina | $14,158–$29,406 | 77% | Likely |
| North Dakota | $15,345–$31,871 | 88% | Likely |
| Ohio | $16,101–$33,440 | 95% | Likely |
| Oklahoma | $14,050–$29,182 | 76% | Likely |
| Oregon | $17,503–$36,353 | 108% | Likely |
| Pennsylvania | $16,208–$33,664 | 96% | Likely |
| Rhode Island | $16,424–$34,112 | 98% | Likely |
| South Carolina | $14,914–$30,974 | 84% | Likely |
| South Dakota | $14,266–$29,630 | 78% | Likely |
| Tennessee | $14,698–$30,526 | 82% | Likely |
| Texas | $14,266–$29,630 | 78% | Likely |
| Utah | $14,914–$30,974 | 84% | Likely |
| Vermont | $15,993–$33,215 | 94% | Likely |
| Virginia | $14,914–$30,974 | 84% | Likely |
| Washington | $18,906–$39,266 | 121% | Likely |
| West Virginia | $14,158–$29,406 | 77% | Likely |
| Wisconsin | $16,532–$34,336 | 99% | Likely |
| Wyoming | $15,561–$32,319 | 90% | Likely |
Common questions
How much does it cost to finish a basement?
Finishing a basement typically runs about $20 to $50 per square foot, so a standard 800 sq ft finish lands near $25,000, and national totals commonly fall between $20,000 and $60,000. Adding a bathroom, egress window, or waterproofing raises it. Use the calculator above for a range matched to your basement.
What drives basement finishing cost the most?
Framing, electrical, drywall, flooring, ceiling, and insulation make up the per-square-foot base, while a full bathroom (roughly $10,000), an egress window (about $3,500), and perimeter waterproofing are the biggest optional swing items. Toggle each above to see it in the breakdown.
Do I need a permit to finish a basement?
Almost always. Finishing a basement adds framed walls, electrical, and often plumbing, all of which are inspected, so building and electrical permits are required in most jurisdictions (plumbing too if you add a bath). Making a basement bedroom legal also requires an egress window. Costs and rules vary by state and locality.