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Delaware residential energy code
Delaware residential energy code (2024 IECC with Delaware amendments (adopted April 2026))
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: 2024 IECC with Delaware amendments (adopted April 2026)
- In force since: April 2026
- Adoption: Statewide code, enforced by local governments
- Delaware's local implementation timeline is reported as 12 months; county notices conflict on start dates (snippets).
- Provisional: a state source was not opened for every point above; DOE energycodes.gov is cited where noted.
Governing body
State of Delaware
Region
DE
Category
code