Regulatory framework
The code baseline for Berkeley County.
For 2026 work, Berkeley County's residential application identifies the 2021 International Residential, Fire, Building, Plumbing, Mechanical, Fuel Gas, Existing Building, and Swimming Pool & Spa Codes; 2020 National Electrical Code; and 2009 International Energy Efficiency Code. The county states it enforces the latest South Carolina-adopted versions and publishes design criteria including 133 mph wind and applicable seismic requirements.