Across 44 permits filed since 2025-03-10, the median is $42,500; half of projects fall between $13,875 and $130,000. 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 Orange County, NY actually reported when they pulled permits.
Recent filings
- Construction of a 1,148 sq. ft. second-story addition to the existing one-family dwelling. Addition to include additional bedrooms and full bathrooms, resulting in a total of eight (8) bedrooms, five (5) full bathrooms, and one (1) half batWarwick · 2026-08-13$355,000
- ADDITION: ATTACHED GARAGE 29' X 30' AND CONVERT ORIGINAL GARAGE INTO A FAMILY ROOM. *ZBA variance granted on 4/27/26 for reduced side yard setback of 33.1'.Town of Warwick · 2026-07-27$58,000
- CONVERT EXISTING BEDROOM INTO HALL & WALK IN CLOSET WITH 14 X 14 ADDITION TO EXPAND BEDROOM.Town of Warwick · 2026-07-09$40,000
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 Orange County, NY came in between $13,875 and $130,000. 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