Building codes across the Southeast continue to evolve, but the overall direction is clear. Homes are becoming more efficient, and compliance requirements are placing greater emphasis on coordination, testing, and documentation.

The biggest challenge is keeping projects on track when different states adopt new requirements on different timelines.

What These Changes Mean for Builders:

Although every state follows its own adoption schedule, several trends are becoming consistent across the Southeast:

• More air-tight homes with stricter blower door testing testing requirements.

• Greater emphasis on duct leakage testing and HVAC performance.
• Increased on ACCA Manual J, Manual S, and Manual D for HVAC design.
• More detailed energy modeling and compliance documentation.
• Updated structural and wind design requirements in jurisdictions adopting newer standards.
• Earlier coordination between engineering, HVAC design, trades, inspectors, and testing providers.

What's Changed:

Georgia
Georgia adopted the 2024 International Codes on January 1, 2026, including the IRC, IBC, IMC, IPC, IFGC, ISPSC, and the 2023 National Electrical Code with Georgia amendments. 

One important exception is the energy code. Georgia continues to enforce the 2015 Georgia State Minimum Standard Energy Code (based on the 2015 IECC with Georgia amendments). For energy compliance, builders should continue using the Georgia energy code rather than Chapter 11 of the 2024 IRC.

South Carolina
South Carolina is currently enforcing the 2021 South Carolina Building Codes.

The state has adopted the 2024 International Codes and the 2023 National Electrical Code, with a statewide effective date of January 1, 2027. Builders with projects scheduled for 2027 should begin preparing now.

Florida
Florida is currently enforcing the 2023 Florida Building Code (8th Edition).

The state is developing the 9th Edition (2026), with implementation expected at the end of 2026. Proposed changes affecting structural design, wind resistance, building envelopes, and energy efficiency are still under review, so builders should avoid planning around draft language until the new code is finalized.

Why It Matters:

Most construction delays occur when project teams work under different assumptions.

Common issues include:

• Different offices using different code editions.
• HVAC system designed to outdated requirements.
• Trade partners following inconsistent installation practices.
• Failed blower door or duct tests discovered at the end of construction.
• Last-minute redesigns delay closings and increase costs.

Watch Out!

Waiting until final inspection to identify compliance issues can lead to failed testing, schedule delays, additional labor, and expensive rework.

Builder Takeaway

Treat energy compliance like scheduling concrete or framing. It should be part of the construction plan from day one, not something checked at the end.

Early coordination helps teams adapt to changing requirements while keeping projects moving.

ARCXIS supports builders across the U.S. through integrated engineering, inspections, HVAC design, energy modeling, and code-compliance services, so projects stay aligned from plan to final inspection. Reach out your local team at: https://arcxis.com/markets