Across 107 permits filed since 2025-01-28, the median is $184,080; half of projects fall between $49,000 and $483,280. 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 Richmond County (Staten Island), NY actually reported when they pulled permits.
Recent filings
- Here, filing an application in conjunction with the G.C. app for extension Job # S01182148-S2.Staten Island · 2026-07-21$5,000
- P.S. -19-R: Structural work type associated to the construction of a connection bridge structure over the existing 1-story building to extend the corridor on the second and third floors to a new building addition.Staten Island · 2026-07-20$895,349
- ASSOCIATED PLUMBING FOR ALTERATION (I1 DOCUMENT) FOR A NEW SECOND STORY ADDITION AND MODIFICATIONS AS INDICATED ON PLANS SUBMITTED HEREWITHStaten Island · 2026-07-13$31,500
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 Richmond County (Staten Island), NY came in between $49,000 and $483,280. 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