Across 124 permits filed since 2025-05-02, the median is $13,565; half of projects fall between $1,500 and $82,088. 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 Erie County, NY actually reported when they pulled permits.
Recent filings
- To an existing 2 story 1 family dwelling build a sunroom addition out the rear of the property.<div><br></div><div>***plans filed*** ***ALL MEP'S on separate permits****</div>Buffalo · 2026-10-21$68,500
- Install receptacles and lighting in new addition. Install subpanel for new circuits with ACFI breakers.Buffalo · 2026-10-14$6,000
- Renovations to the existing Michigan Street Baptist church and new installs on building additionBuffalo · 2026-10-14$200,000
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 Erie County, NY came in between $1,500 and $82,088. 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
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