ADU rules in Allentown, PA — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
Pennsylvania has no statewide ADU mandate. Allentown zoning determines whether ADUs are permitted. Check local zoning for allowances and conditions.
Unlike California and Connecticut, Pennsylvania has no statewide law requiring municipalities to allow ADUs. Whether Allentown permits accessory dwelling units depends entirely on the local zoning ordinance adopted under the PA Municipalities Planning Code (Act 247). Some municipalities allow ADUs by right, some by conditional use or special exception, and many do not address them. Where allowed, typical conditions include owner-occupancy of the principal dwelling, maximum size limits (often 800 to 1,000 sq ft), dedicated parking, and separate utility meters.
Unpermitted ADU: code enforcement, stop-work order. Zoning violation: $100 to $500/day. May require removal of unpermitted unit.
Allentown, PA
Allentown prohibits storing abandoned, inoperable, or unregistered vehicles on public streets or visible on private property. Vehicles may be tagged and towe...
Allentown, PA
Allentown regulates electric vehicle charging infrastructure for residential and commercial properties. Building codes may require EV-ready parking in new co...
Allentown, PA
Allentown regulates overnight parking on public streets. Many areas restrict parking between certain hours or require permits for overnight street parking.
Allentown, PA
Allentown requires pool barriers meeting safety codes to prevent drowning. Fences must be at least 4 to 5 feet tall with self-closing, self-latching gates.
Allentown, PA
Allentown requires permits for retaining walls above a certain height, typically 4 feet. Engineering review may be required for taller walls.
Allentown, PA
Allentown restricts or prohibits intentional feeding of wildlife including deer, coyotes, and bears. Feeding wildlife creates public safety hazards and nuisa...
Side-by-side rule comparisons with other cities in Lehigh County.
See how other cities in Lehigh County handle adu rules.
See how Allentown's adu rules rules stack up against other locations.
Quick Compare
Help us keep this page accurate. If you notice an error or outdated information, let us know.