New Hampshire residential energy code

New Hampshire residential energy code (2018 IECC (RSA 155-A:1))

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: 2018 IECC (RSA 155-A:1)
Adoption: Statewide code, enforced by local governments
The IECC edition is stated in RSA 155-A:1; no opened state page gives its effective date (DOE lists 2023-01-01).
Provisional: a state source was not opened for every point above; DOE energycodes.gov is cited where noted.

Governing body

State of New Hampshire

Region

Applies to

General contracting HVAC Insulation Electrical Windows & doors

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