What rent control exemptions apply in Pennsylvania?

Where Pennsylvania has a statewide or local rent cap, the statute typically exempts several categories: newer construction (usually buildings less than 15 years old, sometimes "rolling" 15-year window), single-family homes owned by individual landlords (often with disclosure requirement), affordable housing already regulated under separate program, owner-occupied buildings of 2 to 4 units, and units already covered by a different rent stabilization program. The exemptions are statute-specific and frequently litigated. A landlord claiming an exemption usually must give the tenant a written notice of the exemption status (form prescribed by statute) at lease signing or before the increase. Pennsylvania uses 68 P.S. 250.501 tenure-based notice: 15 days for tenancies under 1 year, 30 days for 1 year or more. No state rent cap. Rent changes on month-to-month tenancies follow the same notice ladder.

Source: 68 P.S. 250.501 (Pennsylvania Landlord and Tenant Act 1951)