Across 77 permits filed since 2025-04-24, the median is $13,200; half of projects fall between $6,500 and $50,000. 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 Nassau County, NY actually reported when they pulled permits.
Recent filings
- INSTALLATION OF GAS LINE FROM HOUSE TO OUTDOOR BBQ/KITCHEN, COUNTER AND HOUSING FOR BBQ AND PARALLEL ISLAND AND PAVERS - KNOCKING DOWN EXISTING PERGOLA & WOODEN COUNTER AND DECKING. REF#EP2026-029 AND 33910.Rockville Centre · 2026-10-23$39,900
- REPAIR PORCH/DECK, DIRECT REPLACEMENT OF DRIVEWAY/SIDEWALKCity of Long Beach · 2026-10-23$7,500
- DEMOLITION OF A 15' X19' REAR WOOD DECK.Rockville Centre · 2026-10-21$1,000
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 Nassau County, NY came in between $6,500 and $50,000. 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