Building Codes & Plans Preparation

Codes Enforced

Williamsburg County enforces the latest South Carolina State adopted versions of the:

  • International Building Code
  • International Energy Efficiency Code and the National Electric Code
  • International Fire Code
  • International Gas Code
  • International Mechanical Code
  • International Plumbing Code
  • International Residential Code
  • Property Maintenance Code

Plan Designs

Building plans must be designed by a State of South Carolina licensed Design Professional (Engineer and/or Architect) for Residential beyond the scope of the adopted codes, and Commercial occupancy (call 843-355-9321, ext. 5300 for more specific details).

Design Criteria

Design criteria for plan submittal must meet a minimum of 102 to 110 miles per hour (mph) winds; "D" Seismic for Commercial and "D-2" Seismic for Residential.

Plans shall have a:

  • Code Analysis
  • Design Pressures (D/P Rating) for all doors and windows
  • Detailed construction documents for all disciplines
  • Life safety plan
  • Required Special Inspections for rebar, concrete, and structural steel for commercial projects
  • Soils reports for commercial and soils assumption for residential

Plan Requirements