Across 639 permits filed since 2025-04-29, the median is $19,250; half of projects fall between $10,000 and $40,000. Figures are permit valuations reported to building departments. National cost guides answer this question with averages from other markets; these numbers are what homeowners in Westchester County, NY actually reported when they pulled permits.
Recent filings
- CONSTRUCTION OF A NEW 28' X 24 PRESSURE-TREATED WOOD FREESTANDING DECK INCLUDING POSTS, BEAMS, JOISTS, DECKING, STAIRS, GUARDRAILS, HANDRAILS, REINFORCED CONCRETE FOOTINGS, AND ALL RELATED STRUCTURAL COMPONENTS AS PER APPROVED PLANS. PLUS STown of Yorktown · 2026-10-28$18,000
- Type A 3 Story - Remove existing upper and lower 19' x 6' decks. Construct new deck same size and location.White Plains · 2026-10-28$18,000
- Type A 3 Story - Remove existing upper and lower 19' x 6' decks. Construct new deck same size and location.White Plains · 2026-10-28$18,000
How to read these numbers
Permit valuations are the project cost the applicant reports to the building department. They skew slightly low — nobody rounds up for the permit fee — and scope varies, so the middle-half range is the honest picture: half of all deck permits in Westchester County, NY came in between $10,000 and $40,000. We exclude permits under $1,000, jobs filed as whole-house construction, and counties whose building departments don't reliably report valuations.
Same project, other places
Deck in New JerseyDeck in New YorkDeck in ConnecticutDeck on Long Island