Basement finishing contractors in New England
Finishing a basement is the cheapest new living space most houses can gain — but only when moisture, egress, and ceiling height are handled first. In New England the pre-work (water management and code headroom) is what separates a basement that lasts from one that gets gutted after the first wet spring.
Mid-range cost by metro
A 600 sq ft scope at a mid-range finish, with each metro's cost factor applied and a 10% contingency included. Estimates for budgeting, not quotes.
| Metro | Low | Likely | High |
|---|---|---|---|
| Boston, MA1.12× metro factor | $53k | $82k | $121k |
| Worcester, MA0.94× metro factor | $41k | $63k | $93k |
| Providence, RI1.02× metro factor | $42k | $65k | $95k |
| Hartford, CT0.98× metro factor | $41k | $64k | $94k |
| Manchester, NH1.00× metro factor | $38k | $59k | $87k |
| Portland, ME1.06× metro factor | $39k | $61k | $89k |
| Cambridge, MA1.14× metro factor | $54k | $84k | $123k |
| Lowell, MA0.96× metro factor | $46k | $71k | $104k |
| Springfield, MA0.90× metro factor | $37k | $58k | $85k |
| Stamford, CT1.10× metro factor | $47k | $73k | $107k |
| New Haven, CT0.99× metro factor | $41k | $63k | $93k |
| Portsmouth, NH1.05× metro factor | $39k | $61k | $89k |
| Nashua, NH1.01× metro factor | $39k | $60k | $88k |
| Bangor, ME0.93× metro factor | $33k | $51k | $75k |
| Burlington, VT1.03× metro factor | $38k | $59k | $87k |
| South Portland, ME1.03× metro factor | $38k | $59k | $87k |
| Westbrook, ME1.00× metro factor | $37k | $57k | $84k |
| Scarborough, ME1.04× metro factor | $39k | $60k | $88k |
| Falmouth, ME1.07× metro factor | $40k | $61k | $90k |
| Cape Elizabeth, ME1.08× metro factor | $40k | $62k | $91k |
| Biddeford, ME0.98× metro factor | $36k | $56k | $82k |
| Saco, ME0.99× metro factor | $37k | $57k | $83k |
| Brunswick, ME0.99× metro factor | $37k | $57k | $83k |
| Gorham, ME0.99× metro factor | $37k | $57k | $83k |
| Windham, ME0.98× metro factor | $36k | $56k | $82k |
| Yarmouth, ME1.05× metro factor | $39k | $60k | $88k |
| Freeport, ME1.02× metro factor | $38k | $58k | $86k |
Estimated range — based on BLS OEWS national average wages and BLS PPI material indexes applied to Our Haus baseline unit costs, as of June 2026. Estimates are shown as a range and help set expectations. They are not a quote, a verified price, or an appraisal of what a contractor will charge.
City guides
- Basement finishing in Boston, MA
- Basement finishing in Worcester, MA
- Basement finishing in Providence, RI
- Basement finishing in Hartford, CT
- Basement finishing in Manchester, NH
- Basement finishing in Portland, ME
- Basement finishing in Cambridge, MA
- Basement finishing in Lowell, MA
- Basement finishing in Springfield, MA
- Basement finishing in Stamford, CT
- Basement finishing in New Haven, CT
- Basement finishing in Portsmouth, NH
- Basement finishing in Nashua, NH
- Basement finishing in Bangor, ME
- Basement finishing in Burlington, VT
- Basement finishing in South Portland, ME
- Basement finishing in Westbrook, ME
- Basement finishing in Scarborough, ME
- Basement finishing in Falmouth, ME
- Basement finishing in Cape Elizabeth, ME
- Basement finishing in Biddeford, ME
- Basement finishing in Saco, ME
- Basement finishing in Brunswick, ME
- Basement finishing in Gorham, ME
- Basement finishing in Windham, ME
- Basement finishing in Yarmouth, ME
- Basement finishing in Freeport, ME
What a complete estimate spells out
- • How moisture risk is addressed before finishes, in writing
- • Egress window count and whether foundation cutting is included
- • Insulation type and vapor strategy for below-grade walls
- • Whether a bathroom rough-in assumes gravity drainage or an ejector pump
- • Flooring product rated for below-grade installation
Frequently asked questions
Does a finished basement count as square footage at resale?
Usually only partially, and only when it meets code for ceiling height, egress, and heating. Appraisers typically value below-grade space at a discount to above-grade space even when fully finished — which is an argument for finishing it for your own use, not as a pure investment.
Do I need a permit to finish a basement?
Yes, in every New England state, once framing, electrical, or a bedroom is involved. The permit is also what makes the space count legally later — unpermitted finished basements surface at resale and can have to be disclosed or even removed.