Portland, OR · 2026 cost guide
How much does a deck cost in Portland?
In Portland, a deck costs about $5,600–$22,500 in 2026 for a 320 sq ft deck, from pressure-treated to composite — roughly $17.49–$69.96 per square foot. That’s about 6% above the Oregon average.
Estimate your Portland project with the Deck Cost Calculator →
Portland cost breakdown
| Portland typical range | $5,600–$22,500 |
| Portland per square foot | $17.49–$69.96 |
| Oregon state average | $5,300–$21,000 |
| Versus Oregon average | about 6% above average |
What’s different about Portland
Portland is Oregon's largest market with a high cost of living, where Cascadia seismic codes and a wet climate drive bracing and moisture-resistant detailing.
- Seismic bracing and stronger connectors add to structural cost.
- Rot- and mold-resistant or composite materials are favored in humid climates.
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 $5,600 to $22,500 in 2026 for a 320 sq ft deck, from pressure-treated to composite — roughly 17.49–69.96 per square foot. That's about 6% above the Oregon average, reflecting local labor and permit costs.
What affects the cost of a deck in Portland?
Portland is Oregon's largest market with a high cost of living, where Cascadia seismic codes and a wet climate drive bracing and moisture-resistant detailing. Seismic bracing and stronger connectors add to structural 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 Oregon metros
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Open calculator →The Portland figure scales the Oregon 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.