Hampden County functions primarily as a geographic designation; all building permits, zoning, and inspections are handled by the individual cities and towns within the county. There is no county-level building department, and municipal authorities maintain full jurisdiction over local land use and construction oversight.
Many municipalities in the region enforce strict local wetlands protection bylaws that exceed the requirements of the Massachusetts Wetlands Protection Act.
How this fits with the state
The state authority here is Massachusetts Office of Public Safety and Inspections; local building departments. The county file does not replace that — it adds the permit office, local overlays, and the actual filing path.
Source · City-by-city; individual municipalities run independent building departments and permit portalsLast verified · 05 / 2026