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Wiring prices
HomeGuide prices new electrical wiring at $4–$9 per square foot including labor, or $2,000–$13,500 for an average basement, and lists electricians at $50–$130 per hour. HomeAdvisor gives per-device installed prices: outlets $100–$450 each, light switches $60–$300 and light fixtures $150–$900.
| Area | Wiring $4–$9/sq ft |
|---|---|
| 400 sq ft | $1,600–$3,600 |
| 600 sq ft | $2,400–$5,400 |
| 800 sq ft | $3,200–$7,200 |
| 1000 sq ft | $4,000–$9,000 |
| 1200 sq ft | $4,800–$10,800 |
| 1500 sq ft | $6,000–$13,500 |
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.
Getting comparable bids
- Write a one-page scope: rooms, bathroom fixtures, number of egress windows, ceiling type and flooring.
- Ask each contractor to price the permit, the water fix and any electrical panel work as separate lines.
- Ask whether quotes include design, dumpster and final cleaning.
- Compare per-square-foot totals only after removing the bathroom and egress lines, which do not scale with area.
- Check the license, insurance and recent permits of each contractor with your building department.
The usual order of work
| Phase | Who | Notes |
|---|---|---|
| 1. Water and radon | Waterproofer, mitigator | Test radon and fix leaks before anything is covered |
| 2. Permit and plan | Owner, designer | Rooms, egress windows, bathroom location |
| 3. Egress and drains | Excavator, plumber | Cut windows and break slab for drains while the space is open |
| 4. Framing and insulation | Carpenter | Foam on the concrete, treated bottom plates, fire blocking |
| 5. Rough electrical, plumbing, HVAC | Licensed trades | Inspections before walls close |
| 6. Drywall and ceiling | Drywall crew | Leave access panels for valves and cleanouts |
| 7. Flooring, trim, paint, fixtures | Finish trades or owner | Final inspection |
Bathroom and egress costs land early, in phase 3, which is why they surprise people who budget only by the square foot.
Common questions
How much does it cost to wire a basement?
About $4–$9 per square foot with labor, $2,000–$13,500 for a typical basement, according to HomeGuide.
Related calculators
Sources
- https://homeguide.com/costs/cost-to-finish-a-basement
- https://www.homeadvisor.com/cost/basements/
- https://www.blockrenovation.com/guides/basement-remodel-cost-per-square-foot-2026
- https://www.thisoldhouse.com/foundations/reviews/cost-to-finish-basement