Tennessee residential energy code

Tennessee residential energy code (2018 IECC with Tennessee exceptions (Tenn. Comp. R. 0780-02-23))

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 with Tennessee exceptions (Tenn. Comp. R. 0780-02-23)
In force since: 2020-07-16 (last amendment)
Adoption: not confirmed from a state source
Only a Cornell LII mirror of the rule was opened (tn.gov denied access).
Provisional: a state source was not opened for every point above; DOE energycodes.gov is cited where noted.

Governing body

State of Tennessee

Region

Applies to

General contracting HVAC Insulation Electrical Windows & doors

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