Portland, ME · 2026 cost guide
How much does a deck cost in Portland?
In Portland, a deck costs about $5,200–$21,000 in 2026 for a 320 sq ft deck, from pressure-treated to composite — roughly $16.22–$64.9 per square foot. That’s about 4% above the Maine average.
Estimate your Portland project with the Deck Cost Calculator →
Portland cost breakdown
| Portland typical range | $5,200–$21,000 |
| Portland per square foot | $16.22–$64.9 |
| Maine state average | $5,000–$20,000 |
| Versus Maine average | about 4% above average |
What’s different about Portland
Portland is Maine's largest market with the highest cost of living, where deep snow, ice dams, and coastal salt air drive durable exterior detailing.
- Footings have to reach below the frost line, so deeper excavation adds cost.
- Salt air favors corrosion-resistant materials and fasteners.
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 Portland?
In Portland, a deck costs about $5,200 to $21,000 in 2026 for a 320 sq ft deck, from pressure-treated to composite — roughly 16.22–64.9 per square foot. That's about 4% above the Maine average, reflecting local labor and permit costs.
What affects the cost of a deck in Portland?
Portland is Maine's largest market with the highest cost of living, where deep snow, ice dams, and coastal salt air drive durable exterior detailing. Footings have to reach below the frost line, so deeper excavation adds cost.
How can I get an accurate deck building estimate in Portland?
Use the free Deck Cost Calculator to plug in your real measurements, then collect two or three local Portland quotes to compare. Prices vary by neighborhood, access, and project complexity.
Deck building cost in other Maine metros
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Open calculator →The Portland figure scales the Maine 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.