Allegheny County is highly fragmented with 130 municipalities, each responsible for its own building permits and zoning enforcement. The county government primarily handles planning, economic development, and specialized fire marshal inspections, while the individual boroughs and townships manage the vast majority of residential and commercial construction permitting.
The Allegheny County Health Department enforces specific regulations regarding private sewage disposal systems and individual water supply wells that supersede municipal codes in unincorporated areas.
How this fits with the state
The state authority here is Pennsylvania Office of Attorney General; 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; Pittsburgh and other municipalities run independent permit portalsLast verified · 05 / 2026