Across 290 permits filed since 2025-01-25, the median is $18,000; half of projects fall between $9,000 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
- REMOVAL OF EXISTING ABOVE-GROUND POOL AND INSTALL NEW ABOVE-GROUND POOL AS PER PLANS FILED. PROPOSED WORK INCLUDES ALTERATION TO EXISTING POOL DECK, RELOCATION OF EXISTING FENCE, AND REPLACEMENT AND RELOCATION OF POOL EQUIPMENT.City of Yonkers · 2026-07-24$50,000
- ** Legalization of deck and railing repairs.White Plains · 2026-07-24$31,000
- Disconnect the BBQ line for the deck renovation. (2026-00379-BLDG)White Plains · 2026-07-24$1,150
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 $9,000 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.