Philadelphia Building Safety: Green Building Code Rules (2026)

Philadelphia's energy code package layers on top of national models. Subcode EC of Title 4-100 adopts the latest IECC for residential and ASHRAE 90.1 for commercial, with city-specific amendments including the Cool Roof Law (Section A-3010) and enhanced commissioning thresholds for buildings over 50,000 square feet. The Philadelphia High Performance Building Manual is mandatory for projects receiving city funding, leases, tax-credit subsidies, or air-rights bonuses; it requires LEED Silver-equivalent performance, third-party commissioning, and post-occupancy energy reporting. Building Energy Performance Policy (Code 9-3402) requires existing large buildings to benchmark, tune up every five years, and disclose performance publicly. Bill 230754 (2024) tightened residential insulation and air-tightness standards.