Deck Building Cost in Boston (2026)
Average cost in Boston
US$5,500 — US$25,000
US$35 — US$75 per sq ft
Cost Breakdown
ItemizedDecking boards, framing lumber, and concrete
45%
Skilled installation and site prep
35%
Safety components and access
10%
City of Boston ISD fees and plans
5%
Fasteners, stains, and sealants
5%
Sales Tax at 6.25%
📋What's Included
ScopeTypically Includes
- Pressure-treated lumber
- Concrete footings
- Railing system
- Stairs (1 set)
- Hardware & fasteners
- Labor
Typically Excludes
- Composite or hardwood decking
- Built-in seating or planters
- Pergola or roof
- Lighting
- Permits
Based on a standard 200 sq ft pressure-treated wood deck.
🧮Estimate Your Cost
InteractiveEstimated Cost
US$6,912 — US$10,368
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$11,508
Today
US$11,957
Deck Building in Boston is ↑ 3.9% compared to roughly a year ago — about US$449 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 Deck Build Contractors in Boston
Verified providersProvider 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
Yes, the Boston Inspectional Services Department (ISD) requires a permit for all attached decks and any freestanding deck more than 30 inches above grade. Fees typically range from $300 to $2,000 depending on project value.
Per the Massachusetts State Building Code (780 CMR), footings must extend at least 48 inches below grade to reach the frost line. This prevents structural shifting during Boston's freeze-thaw cycles.
According to 2025-2026 regional data, a wood deck addition in Boston recoups approximately 66.4% of its cost at resale, while composite decks offer a higher return of roughly 72.5%.
While Boston does not have a city-specific sales tax, you must account for the 6.25% Massachusetts state sales tax on all materials. This typically adds $900 to $1,800 to a mid-range project budget.
Boston construction costs are roughly 35-38% higher than the national average due to high prevailing wages for union labor, strict energy and building codes, and logistical challenges of dense urban sites.
📊Our Methodology
How we collect dataAggregated from 5+ 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: 1 weeks 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.