Across 95 permits filed since 2025-01-25, the median is $8,300; half of projects fall between $3,000 and $45,500. 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 Milford, CT actually reported when they pulled permits.
Recent filings
- Wiring for new shed dormer extension, install lighting and outlets for storage area. Relocate wiring for AC unitCity of Milford · 2026-07-24$2,500
- Installing 1 sump pump, 1 yard well, 15 LNFT of downspout extensions, and 5 LNFT buried discharge lineCity of Milford · 2026-07-24$5,948
- Wiring for addition and alterations. 18 - outlets, 10 - switches, 6 - lightsCity of Milford · 2026-07-23$2,800
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 Milford, CT came in between $3,000 and $45,500. 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