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Basement finishing cost in Idaho
Idaho's construction trades earn 84% of the national average wage, so with labor at about 40% of the budget the estimate runs 6.5% below the U.S. figure. A 1,000 sq ft mid-range finish works out to about $37,417–$70,157, and a basic one to $23,386–$37,417. Idaho ranks 39 of 51 (50 states plus DC) for trade-wage cost, highest first.
| Size | Basic | Mid-range | High-end |
|---|---|---|---|
| 500 sq ft | $11,693–$18,709 | $18,709–$35,079 | $35,079–$46,771 |
| 700 sq ft | $16,370–$26,192 | $26,192–$49,110 | $49,110–$65,480 |
| 800 sq ft | $18,709–$29,934 | $29,934–$56,126 | $56,126–$74,834 |
| 1,000 sq ft | $23,386–$37,417 | $37,417–$70,157 | $70,157–$93,543 |
| 1,200 sq ft | $28,063–$44,901 | $44,901–$84,189 | $84,189–$112,251 |
| 1,500 sq ft | $35,079–$56,126 | $56,126–$105,236 | $105,236–$140,314 |
The wages behind the Idaho factor
The index averages four trades that do most basement work. A factor of 0.935 means a job that costs $100 in a national-average market costs about $93.54 here, before any differences in material prices, permit fees or demand.
| Trade | Idaho | U.S. | Ratio |
|---|---|---|---|
| Carpenters | $26.96 | $31.55 | 85% |
| Electricians | $32.02 | $34.37 | 93% |
| Plumbers | $28.10 | $34.70 | 81% |
| Drywall installers | $23.19 | $30.58 | 76% |
BLS OEWS mean hourly wages, May 2025.
Neighbors in the ranking
| State | Factor | 1,000 sq ft mid-range |
|---|---|---|
| Idaho | 0.935 | $37,417–$70,157 |
| Kentucky | 0.940 | $37,620–$70,537 |
| West Virginia | 0.938 | $37,512–$70,334 |
| Tennessee | 0.933 | $37,326–$69,987 |
| Georgia | 0.933 | $37,311–$69,959 |
Add-ons in Idaho
| Add-on | Low | High |
|---|---|---|
| Half bath | $4,677 | $14,031 |
| Three-quarter bath | $9,354 | $20,579 |
| Full bath | $14,031 | $32,740 |
| Egress window, each | $3,742 | $11,225 |
| Building permit | $1,200 | $2,000 |
Bathroom ranges from Fixr; egress from HomeGuide; permits from HomeAdvisor. Labor portion adjusted for local wages.
How this estimate is built
The base number is area times a published cost per square foot. Block Renovation, a remodeling contractor, puts contractor-led basement finishes at $25–$40 per square foot for a basic finish, $40–$75 for mid-range and $75–$100 or more for high-end work in 2026. HomeAdvisor's national figure is lower, $7–$23 per square foot, because it also counts partly finished spaces and owner-managed projects. Use the HomeAdvisor range if you will act as your own general contractor or only need flooring, paint and lighting in an already dry, framed room.
Add-ons are priced separately because they do not scale with area. A bathroom costs about the same whether it sits in a 600 or a 1,600 square foot basement. Fixr lists half baths at $5,000–$15,000, three-quarter baths at $10,000–$22,000 and full baths at $15,000–$35,000. HomeGuide puts a cut-in egress window at $4,000–$12,000, most often $6,000–$8,000. HomeAdvisor lists permits at $1,200–$2,000.
When you pick a state, the calculator keeps 60% of the cost as is and scales the other 40% by local wages. This Old House notes that labor is usually about 40% of a basement finishing budget, and the wage index comes from the Bureau of Labor Statistics' May 2025 mean hourly wages for carpenters, electricians, plumbers and drywall installers.
What moves the price
- Water. A basement that leaks must be fixed first. HomeAdvisor's average waterproofing job is $4,400, and none of that shows up in a per-square-foot finishing price.
- Plumbing. Adding a toilet below the sewer line needs an ejector pit or upflush system. Rough-in pipes left by the builder cut the cost of a bathroom sharply.
- Ceiling height. Ducts and beams that hang below 6′ 4″ have to be moved, or the floor lowered, before a room can count as habitable.
- Bedrooms. Every sleeping room in a basement needs its own emergency escape opening under IRC R310, so each bedroom can add an egress window.
- Finish choices. Block Renovation lists luxury vinyl plank at $3–$7 per sq ft installed, carpet at $2–$5 and ceramic tile at $5–$10.
Common questions
How much does it cost to finish a basement in Idaho?
About $37,417–$70,157 for a 1,000 sq ft mid-range contractor finish, using 2026 national ranges adjusted for Idaho's May 2025 trade wages.
Are basements cheaper to finish in Idaho?
Labor in Idaho costs 84% of the national average, which moves the total about 6.5% below the U.S. estimate.
What do carpenters make in Idaho?
The mean hourly wage for carpenters in Idaho was $26.96 in May 2025, against $31.55 nationally.
Related calculators
Sources
- https://api.bls.gov/publicAPI/v1/timeseries/data/ (OEWS series OEUS…472031, 472111, 472152, 472081, May 2025)
- https://www.bls.gov/oes/tables.htm
- https://www.blockrenovation.com/guides/basement-remodel-cost-per-square-foot-2026
- https://www.thisoldhouse.com/foundations/reviews/cost-to-finish-basement
- https://www.fixr.com/costs/bathroom-addition
- https://homeguide.com/costs/egress-window-installation-cost
- https://www.homeadvisor.com/cost/basements/