Deck Building Cost in Washington, DC (2026)
Deck Building in Washington, DC runs about 12% above the national average. A typical 320 sq ft project starts around $5,380–$8,960 for pressure-treated wood. Estimate your exact Washington, DC project below.
Deck Building Cost Calculator
Adjust the details for an installed-cost range tailored to you.
Length × width of the deck surface. A 16×20 deck is 320 sq ft.
Ballpark estimate for planning — not a quote.
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Deck Building cost in Washington, DC by material
Installed cost for a typical 320 sq ft project in Washington, DC.
| Material | Per sq ft | Typical Washington, DC project |
|---|---|---|
| Pressure-treated wood | $16.8–$28.0 | $5,380 – $8,960 |
| Cedar / redwood | $28.0–$44.8 | $8,960 – $14,340 |
| Composite (Trex-style) | $33.6–$67.2 | $10,750 – $21,500 |
What affects your Washington, DC cost
- Decking material and railing style
- Height off the ground and stairs
- Footings, framing and permits
- Built-ins (benches, pergola, lighting)
- Local labor rates
Washington, DC deck building — FAQ
How much does deck building cost in Washington, DC?
In Washington, DC, a typical 320 sq ft deck building project runs about $5,380–$8,960 for pressure-treated wood, installed. That's about 12% above the national average — metro labor and permit costs in Washington, DC tend to run higher than the Maryland state average. Use the calculator above for your exact size and material.
How much does deck building cost per sq ft in Washington, DC?
In Washington, DC, installed deck runs about $16.8–$67.2 per sq ft depending on material (pressure-treated wood $16.8–$28.0, cedar / redwood $28.0–$44.8, composite (trex-style) $33.6–$67.2). That's about 12% above the national average.
How much does it cost to build a deck in 2026?
A typical 320 sq ft deck runs about $5,000–$8,000 in pressure-treated wood, or $10,000–$19,000 in composite, installed. Size, height, railings and material drive the price — use the calculator for a localized estimate.
Is composite decking worth it?
Composite costs roughly 1.5–2× wood up front but eliminates staining/sealing and lasts 25–30+ years, so total cost of ownership is often lower. It's the popular choice for homeowners who don't want annual maintenance.
Deck Building cost across Maryland
Washington, DC runs about 12% above the national average. See the full Maryland breakdown and statewide averages.
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