Across 42 permits filed since 2025-03-03, the median is $18,111; half of projects fall between $5,875 and $95,000. 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 Yonkers, NY actually reported when they pulled permits.
Recent filings
- Wiring for a second story additionCity of Yonkers · 2026-08-25$9,500
- PROPOSED 1 STORY ADDITION AT REAR AND 2ND FLOOR ADDITION OVER EXISTING 1 STORY ATTACHED GARAGE AT EAST SIDE OF EXISTING 1 FAMILY DWELLING, AS PER PLANS FILED. PROPOSED WORK INCLUDES ENLARGEMENT OF EXISTING KITCHEN, AND CREATION OF NEW MUDROCity of Yonkers · 2026-08-25$325,000
- Installing Lights, Switches & Outlets on 1st and 2nd Floor Extension.City of Yonkers · 2026-08-24$25,000
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 home addition permits in Yonkers, NY came in between $5,875 and $95,000. 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
Home addition in New YorkHome addition in ConnecticutHome addition on Long Island