Across 67 permits filed since 2025-03-03, the median is $13,200; half of projects fall between $7,250 and $58,305. 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
- DIRECT REPLACEMENT OF DRIVEWAY/REAR PATIO, REPAIR TO SIDE DECK ON SOUTH SIDE OF HOUSE, NO CURB CUTCity of Long Beach · 2026-08-28$8,600
- Legalize and maintain a 14 X 21 (oa) (294 sf) raised wood rear deck with stairs (1) to grade as per plans prepared by John R Bracco R.A. 7/1/26Village of Mineola · 2026-08-20$10,290
- PROPOSED REAR DECK EXTENSION **NO ELECTRICAL** **ALL WORK TO CONFORM TO NYS UNIFORM FIRE PREVENTION AND BUILDING CODE** **CONSTRUCTION MATERIAL MUST BE REMOVED BY CONTRACTOR**City of Long Beach · 2026-08-19$4,000
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 $7,250 and $58,305. 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