Regulatory framework
The code baseline for Northumberland County.
Pennsylvania Uniform Construction Code (UCC), 34 Pa. Code Chapters 401-405 and referenced current ICC codes as adopted by Pennsylvania, including applicable 2021 ICC editions for 2026 permits. The county's hazard mitigation plan states that most municipalities adopted the UCC; opted-in municipalities use local or third-party code officials, while Pennsylvania Labor and Industry retains responsibility in opted-out municipalities and for state-owned buildings.