Wilmington, DE · 2026 cost guide
How much does a deck cost in Wilmington?
In Wilmington, a deck costs about $5,000–$20,000 in 2026 for a 320 sq ft deck, from pressure-treated to composite — roughly $15.76–$63.04 per square foot. That’s in line with the Delaware average.
Estimate your Wilmington project with the Deck Cost Calculator →
Wilmington cost breakdown
| Wilmington typical range | $5,000–$20,000 |
| Wilmington per square foot | $15.76–$63.04 |
| Delaware state average | $4,900–$19,500 |
| Versus Delaware average | in line with average |
What’s different about Wilmington
Wilmington is Delaware's largest market with the deepest contractor pool, and proximity to the Philadelphia corridor lifts labor and cost of living.
- Rot- and mold-resistant or composite materials are favored in humid climates.
- 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 Wilmington?
In Wilmington, a deck costs about $5,000 to $20,000 in 2026 for a 320 sq ft deck, from pressure-treated to composite — roughly 15.76–63.04 per square foot. That's in line with the Delaware average, reflecting local labor and permit costs.
What affects the cost of a deck in Wilmington?
Wilmington is Delaware's largest market with the deepest contractor pool, and proximity to the Philadelphia corridor lifts labor and cost of living. Rot- and mold-resistant or composite materials are favored in humid climates.
How can I get an accurate deck building estimate in Wilmington?
Use the free Deck Cost Calculator to plug in your real measurements, then collect two or three local Wilmington quotes to compare. Prices vary by neighborhood, access, and project complexity.
Deck building cost in other Delaware metros
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Open calculator →The Wilmington figure scales the Delaware 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.