Basement Finishing Cost in Boston (2026)
Average cost in Boston
US$16,245 — US$140,000
US$50 — US$140 per sq ft
Cost Breakdown
ItemizedSkilled trades and general contracting
35%
Framing, drywall, flooring, and finishes
40%
Wiring, lighting, and rough-in plumbing
15%
Moisture barriers and sump pump systems
7%
City of Boston building and trade permits
3%
Sales Tax at 6.25%
📋What's Included
ScopeTypically Includes
- Framing & drywall
- Basic flooring (LVP or carpet)
- Electrical (outlets & lighting)
- Egress window (if required)
- Painting
- Basic bathroom rough-in
Typically Excludes
- Full basement bathroom
- Built-in bar or kitchen
- Home theater wiring
- Waterproofing (separate cost)
- Permits & inspections
Assumes an unfinished basement with existing concrete floor and basic utilities.
🧮Estimate Your Cost
InteractiveEstimated Cost
US$30,624 — US$45,936
Based on 9 sources and market data for Boston. Actual costs may vary depending on specific project requirements.
📈Price Momentum
Year-over-year~1 year ago
US$56,998
Today
US$60,190
Basement Finishing in Boston is ↑ 5.6% compared to roughly a year ago — about US$3,192 more on the average project.
Comparison derived from the year-over-year change rate, not a month-by-month price index. We don't store historical snapshots yet — when we do, this will become a real time series.
🏢Top Basement Finish Contractors in Boston
Verified providersX'CLUSIVE RENOS & REMODELING LLC
17 Blakeville St, Boston, MA 02121, USA
43 reviews
Greater Boston Contractors
1309 Beacon St Suite 300, Brookline, MA 02446, USA
29 reviews
Provider data sourced from public business directories. Ratings and reviews are public and may change. LookupCost is not affiliated with listed providers.
💬What People Actually Paid
Community❓Common Questions
Permits in Boston for 2026 typically cost between $270 and $1,000+, calculated at a $50 base fee plus $10 for every $1,000 of estimated project value.
Skilled labor rates in the Boston area for 2026 average between $50 and $150 per hour, with a regional mean of approximately $72 per hour for general trades.
Adding a full bathroom to a Boston basement renovation typically increases the budget by $15,000 to $25,000 depending on the complexity of the plumbing rough-in.
Homeowners in the Boston area can expect a return on investment (ROI) of 50% to 75%, with the project typically adding about 10% to the home's total resale value.
📊Our Methodology
How we collect dataAggregated from 9+ verified web sources and cost databases
Licensed contractor estimates and regional cost guides
Government construction and labor statistics
Community-reported project costs and reviews
Last data collection: 4 days ago. Updates run weekly. All costs in USD.
About this data
Cost figures are estimates synthesized from public market data using AI research and refreshed regularly. Real project costs vary by scope, materials, contractor, and site conditions. Always get verified quotes from licensed contractors for your specific project.
Spotted bad data? Let us know — we'll review and update.