Washington, DC · 2026 cost guide
How much does a deck cost in Washington?
In Washington, a deck costs about $6,600–$26,500 in 2026 for a 320 sq ft deck, from pressure-treated to composite — roughly $20.63–$82.5 per square foot. That’s about 10% above the District of Columbia average.
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Washington cost breakdown
| Washington typical range | $6,600–$26,500 |
| Washington per square foot | $20.63–$82.5 |
| District of Columbia state average | $6,000–$24,000 |
| Versus District of Columbia average | about 10% above average |
What’s different about Washington
Washington's dense urban permitting, historic-district reviews, and high labor costs make exterior work expensive and slower to schedule than surrounding areas.
- Permit fees and skilled-trade labor rates here run well above the national average — usually the single biggest cost driver.
- 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 Washington?
In Washington, a deck costs about $6,600 to $26,500 in 2026 for a 320 sq ft deck, from pressure-treated to composite — roughly 20.63–82.5 per square foot. That's about 10% above the District of Columbia average, reflecting local labor and permit costs.
What affects the cost of a deck in Washington?
Washington's dense urban permitting, historic-district reviews, and high labor costs make exterior work expensive and slower to schedule than surrounding areas. Permit fees and skilled-trade labor rates here run well above the national average — usually the single biggest cost driver.
How can I get an accurate deck building estimate in Washington?
Use the free Deck Cost Calculator to plug in your real measurements, then collect two or three local Washington quotes to compare. Prices vary by neighborhood, access, and project complexity.
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Open calculator →The Washington figure scales the District of Columbia 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.