How much does basement finishing cost in Boston?
Boston, MA · Suffolk County · 28 ZIP codes · Data updated May 2026
A basement finishing in Boston typically costs $48,386 - $99,187, with most homeowners paying around $75,222. Boston runs about 31% above the Massachusetts median, and quotes can vary up to 52% between its cheapest and most expensive ZIP codes, so the neighborhood matters as much as the contractor.
It's a strong investment here: homeowners in this region recoup roughly 70% of the cost at resale, about $52,580 on a typical Boston job.
October is normal-demand season for basement finishing in this climate. Contractors in Suffolk County are booking about 4.5 weeks out.
Boston Cost Range
$48,386 - $99,187
Typical: $75,222
Strong ROI
Equity Gain
$52,580
Added at resale
on a typical Boston job
Normal season · ~4.5 wk contractor lead time
Basement Finishing Cost by ZIP Code in Boston
Each ZIP gets its own estimate from local home values and labor rates. Open yours for the full breakdown, seasonality, and ROI detail.
| ZIP | Estimated range | vs. city average | Details |
|---|---|---|---|
| 02126 | $48,386 - $65,464 | -24% | Full estimate → |
| 02121 | $51,808 - $70,093 | -19% | Full estimate → |
| 02136 | $52,296 - $70,754 | -18% | Full estimate → |
| 02119 | $52,785 - $71,415 | -17% | Full estimate → |
| 02125 | $53,274 - $72,076 | -17% | Full estimate → |
| 02128 | $53,763 - $72,738 | -16% | Full estimate → |
| 02122 | $54,251 - $73,399 | -15% | Full estimate → |
| 02135 | $54,740 - $74,060 | -14% | Full estimate → |
| 02124 | $55,718 - $75,383 | -13% | Full estimate → |
| 02215 | $57,673 - $78,028 | -10% | Full estimate → |
| 02113 | $58,650 - $79,350 | -8% | Full estimate → |
| 02131 | $58,650 - $79,350 | -8% | Full estimate → |
| 02114 | $59,628 - $80,673 | -7% | Full estimate → |
| 02130 | $65,493 - $88,608 | +2% | Full estimate → |
| 02132 | $65,493 - $88,608 | +2% | Full estimate → |
| 02127 | $69,891 - $94,559 | +9% | Full estimate → |
| 02134 | $71,358 - $96,542 | +12% | Full estimate → |
| 02108 | $73,313 - $99,187 | +15% | Full estimate → |
| 02109 | $73,313 - $99,187 | +15% | Full estimate → |
| 02110 | $73,313 - $99,187 | +15% | Full estimate → |
| 02111 | $73,313 - $99,187 | +15% | Full estimate → |
| 02115 | $73,313 - $99,187 | +15% | Full estimate → |
| 02116 | $73,313 - $99,187 | +15% | Full estimate → |
| 02118 | $73,313 - $99,187 | +15% | Full estimate → |
| 02120 | $73,313 - $99,187 | +15% | Full estimate → |
| 02129 | $73,313 - $99,187 | +15% | Full estimate → |
| 02199 | $73,313 - $99,187 | +15% | Full estimate → |
| 02210 | $73,313 - $99,187 | +15% | Full estimate → |
Frequently Asked Questions
How much does a basement finishing cost in Boston?
Based on 2026 data, a basement finishing in Boston, MA costs $48,386 - $99,187, with a typical price around $75,222. The range covers Boston's 28 ZIP codes and the ±15% variance between contractor bids.
Is a basement finishing worth it in Boston?
Homeowners in this region typically recoup about 70% of the cost at resale, roughly $52,580 on a $75,222 project. That makes it one of the stronger-returning projects you can do here.
Why do basement finishing quotes vary across Boston?
Local home values and labor rates differ by ZIP code. In Boston, the same project can cost up to 52% more in the most expensive ZIP than in the least expensive one. Check your exact ZIP below for a precise range.
Other Project Costs in Boston
Sources: Remodeling Magazine Cost vs. Value, Zillow ZHVI, BLS construction wages, US Census. Methodology