r/UpstateSC • u/HeroicBuilders • 3h ago
South Carolina building codes are changing January 1, 2027. Here's what homeowners should know.
heroicbuildersllc.comHeads up for anyone planning to build a home, add onto an existing house, or tackle a major renovation in the Upstate next year.
South Carolina is adopting updated building codes effective January 1, 2027, including the 2024 International Residential Code and 2023 National Electrical Code, with state-specific modifications.
A few things worth knowing:
- Permits: If you're submitting plans near the end of 2026, confirm which code edition your city or county will use. Submitting before January 1 doesn't necessarily guarantee approval under the existing codes.
- Existing plans: Previously purchased or completed construction plans may need another review.
- Construction costs: Not every project will become more expensive, but changes to structural requirements, equipment, or materials could affect budgets.
- Energy codes: Interestingly, South Carolina's mandatory energy standard remains the 2009 International Energy Conservation Code.
I work with Heroic Builders here in Greenville, and we've been keeping an eye on this transition as we plan upcoming projects.
We put together a more detailed breakdown with links to the official state guidance:
For anyone planning construction in 2027, it's worth discussing the changes with your builder and local permitting office before finalizing plans.