PA HB2186

Accessory dwelling units (ADUs) would become a permitted use by right on any lot in Pennsylvania where single-family detached homes are allowed, requiring municipalities to adopt ordinances permitting at least one ADU per single-family lot.

Municipalities must approve or deny ADU permit applications within 30 days (or 60 days if additional review is needed), with no discretionary review or hearings required; applications not decided within the timeframe are deemed approved.

Permit fees are capped at $250, and municipalities cannot require owner-occupancy, familial relationships between ADU and main home occupants, additional off-street parking, or permit renewals.

Size restrictions limit municipal regulation: minimum floor area cannot exceed 150 square feet, maximum floor area must be at least 50% of the main home or 1,250 square feet (whichever is less), and height limits cannot be below 25 feet.

The law does not override existing deed restrictions, covenants, or planned community bylaws, and takes effect 60 days after enactment.