PA · State directory
Pennsylvania ADU rules
Official accessory dwelling unit regulations for 12 jurisdictions in Pennsylvania.
Not sure which city yet?
We have read the ordinances for 12 Pennsylvania cities and lined them up side by side: detached vs internal, size limits, owner occupancy, and approval process.
Cities
Allentown4 sources · verified August 2026Bethlehem4 sources · verified August 2026Erie6 sources · verified August 2026Harrisburg4 sources · verified August 2026Lancaster5 sources · verified August 2026Lower Merion4 sources · verified August 2026Philadelphia5 sources · verified August 2026Pittsburgh4 sources · verified August 2026Reading4 sources · verified August 2026Scranton5 sources · verified August 2026State College6 sources · verified August 2026Upper Darby4 sources · verified August 2026
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