Boston, MA · 2026 cost guide
How much does a deck cost in Boston?
In Boston, a deck costs about $6,600–$26,000 in 2026 for a 320 sq ft deck, from pressure-treated to composite — roughly $20.46–$81.84 per square foot. That’s about 10% above the Massachusetts average.
Estimate your Boston project with the Deck Cost Calculator →
Boston cost breakdown
| Boston typical range | $6,600–$26,000 |
| Boston per square foot | $20.46–$81.84 |
| Massachusetts state average | $6,000–$23,500 |
| Versus Massachusetts average | about 10% above average |
What’s different about Boston
Boston combines strict permitting, some of the nation's highest labor costs, dense urban access constraints, and harsh winters that make exterior work expensive.
- Footings have to reach below the frost line, so deeper excavation adds cost.
- Permit fees and skilled-trade labor rates here run well above the national average — usually the single biggest cost driver.
How the cost is built
Deck cost depends on size, decking material (pressure-treated pine is cheapest; composite and PVC are mid-range; tropical hardwood is premium), and structural extras like railings, stairs, and elevated footings. Permits and ledger flashing add cost on attached decks.
Frequently asked questions
How much does a deck cost in Boston?
In Boston, a deck costs about $6,600 to $26,000 in 2026 for a 320 sq ft deck, from pressure-treated to composite — roughly 20.46–81.84 per square foot. That's about 10% above the Massachusetts average, reflecting local labor and permit costs.
What affects the cost of a deck in Boston?
Boston combines strict permitting, some of the nation's highest labor costs, dense urban access constraints, and harsh winters that make exterior work expensive. Footings have to reach below the frost line, so deeper excavation adds cost.
How can I get an accurate deck building estimate in Boston?
Use the free Deck Cost Calculator to plug in your real measurements, then collect two or three local Boston quotes to compare. Prices vary by neighborhood, access, and project complexity.
Deck building cost in other Massachusetts metros
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Open calculator →The Boston figure scales the Massachusetts cost range by a local metro index, then adjusts for the city’s labor market and climate. A 2026 planning estimate, not a quote — get local bids. See our methodology.