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Basement finishing cost in Massachusetts
Massachusetts's construction trades earn 117% of the national average wage, so with labor at about 40% of the budget the estimate runs 6.8% above the U.S. figure. A 1,000 sq ft mid-range finish works out to about $42,721–$80,101, and a basic one to $26,700–$42,721. Massachusetts ranks 9 of 51 (50 states plus DC) for trade-wage cost, highest first.
| Size | Basic | Mid-range | High-end |
|---|---|---|---|
| 500 sq ft | $13,350–$21,360 | $21,360–$40,050 | $40,050–$53,401 |
| 700 sq ft | $18,690–$29,904 | $29,904–$56,071 | $56,071–$74,761 |
| 800 sq ft | $21,360–$34,176 | $34,176–$64,081 | $64,081–$85,441 |
| 1,000 sq ft | $26,700–$42,721 | $42,721–$80,101 | $80,101–$106,801 |
| 1,200 sq ft | $32,040–$51,265 | $51,265–$96,121 | $96,121–$128,162 |
| 1,500 sq ft | $40,050–$64,081 | $64,081–$120,151 | $120,151–$160,202 |
The wages behind the Massachusetts factor
The index averages four trades that do most basement work. A factor of 1.068 means a job that costs $100 in a national-average market costs about $106.80 here, before any differences in material prices, permit fees or demand.
| Trade | Massachusetts | U.S. | Ratio |
|---|---|---|---|
| Carpenters | $38.31 | $31.55 | 121% |
| Electricians | $39.21 | $34.37 | 114% |
| Plumbers | $43.46 | $34.70 | 125% |
| Drywall installers | $32.80 | $30.58 | 107% |
BLS OEWS mean hourly wages, May 2025.
Neighbors in the ranking
| State | Factor | 1,000 sq ft mid-range |
|---|---|---|
| Massachusetts | 1.068 | $42,721–$80,101 |
| California | 1.072 | $42,868–$80,377 |
| District of Columbia | 1.068 | $42,732–$80,123 |
| New York | 1.059 | $42,358–$79,421 |
| Minnesota | 1.043 | $41,739–$78,261 |
Add-ons in Massachusetts
| Add-on | Low | High |
|---|---|---|
| Half bath | $5,340 | $16,020 |
| Three-quarter bath | $10,680 | $23,496 |
| Full bath | $16,020 | $37,380 |
| Egress window, each | $4,272 | $12,816 |
| 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 Massachusetts?
About $42,721–$80,101 for a 1,000 sq ft mid-range contractor finish, using 2026 national ranges adjusted for Massachusetts's May 2025 trade wages.
Are basements cheaper to finish in Massachusetts?
Labor in Massachusetts costs 117% of the national average, which moves the total about 6.8% above the U.S. estimate.
What do carpenters make in Massachusetts?
The mean hourly wage for carpenters in Massachusetts was $38.31 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/