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Maryland residential energy code
Maryland residential energy code (2021 IECC with Maryland amendments)
As of 2026-10-22. DOE's Building Energy Codes Program (energycodes.gov) lags state adoption, so where a state's own rule was read it governs and DOE's differing figure is noted. Residential means one- and two-family dwellings and townhouses. Local amendments can apply; check the code body before relying on a section.
Key features
- Code in force: 2021 IECC with Maryland amendments
- In force since: 2023-05-29
- Adoption: Statewide code, enforced by local governments
- The 2024 IECC was proposed in the Maryland Register on 2026-06-26; no effective date found.
- Verified against the state's own adopted rule or code-body page.
Governing body
State of Maryland
Region
MD
Category
code