Across 35 permits filed since 2025-03-10, the median is $75,000; half of projects fall between $9,000 and $177,500. 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 Dutchess County, NY actually reported when they pulled permits.
Recent filings
- Addition - rear (2014-2015) - previously constructed rear addition measuring approximately 980 sq. feet; additions included (1) two-story and (1) one-story to the rear of the existing house; did receive previous site plan approval (2013-201Village of Rhinebeck · 2026-09-03$241,000
- Electrical survey for addition to garage.City of Beacon · 2026-09-01$1,000
- 199.1 sq ft Addition & Renovation to the Single Family DwellingTown of Rhinebeck · 2026-08-25$1,100,000
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 Dutchess County, NY came in between $9,000 and $177,500. 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