Maximum lot coverage varies by zoning district across Allegheny County municipalities. Pittsburgh R1A: 40%. R1D-H: 60%. Mt Lebanon R-1: 30%. Impervious coverage triggers stormwater requirements.
Pittsburgh Zoning §903 sets lot coverage by district: R1A-VL 40%, R1D-H 60%, R2-M 65%. Mt Lebanon R-1 limits building coverage to 30%. Upper St Clair AR: 25% building coverage, 35% total impervious. Lot coverage generally includes the principal building, accessory structures, driveways, patios, and pools. Projects disturbing more than 1 acre or adding over 10,000 sq ft impervious trigger ACHD and municipal stormwater management requirements under Act 167. County Act 167 Plans apply to all watersheds.
Over-coverage violations: 250 to 1,000 dollars, removal of excess impervious, and retroactive stormwater mitigation required.
Allegheny County, PA
ACHD Article XXI Part F sets countywide commercial/industrial noise limits: 65 dBA day / 55 dBA night at receiving residential property lines. This is one of...
Allegheny County, PA
Pittsburgh International Airport (PIT) sits in Allegheny County and operates Class C airspace. Aircraft noise is federally preempted under 49 U.S.C. §40103 (...
Allegheny County, PA
Vehicle noise enforced under PA Vehicle Code Title 75 §4523 (muffler required) statewide. No countywide Allegheny ordinance. Loud exhaust, modified mufflers,...
Allegheny County, PA
Amplified music is regulated municipally, not countywide. Pittsburgh Code §601.04 prohibits amplified sound audible 100 feet from source after 10 PM. ACHD Ar...
Allegheny County, PA
Allegheny County has no countywide leaf-blower ordinance. A few municipalities (notably Mt. Lebanon and Sewickley) restrict gas-powered blower hours; Pittsbu...
Allegheny County, PA
Street parking rules vary by municipality across Allegheny County. Pittsburgh Parking Authority enforces metered zones, residential permit parking (RPP), and...
See how Allegheny County's lot coverage limits rules stack up against other locations.
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