Pennsylvania · Building code

The building code in force in Pennsylvania now.

Pennsylvania Uniform Construction Code (34 Pa. Code Ch. 401-405): 2021 I-Codes as amended by the RAC (IBC, IEBC, IRC, IECC, IPC, IMC, IFGC, ISPSC, IWUIC), effective Jan 1, 2026. Enforced by Municipalities that opted in enforce through certified code officials or third-party agencies; L&I enforces where a municipality opted out; the Review and Advisory Council (RAC) reviews ICC editions and L&I adopts by regulation. Verified on the primary source, re-checked weekly.

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Building code in Pennsylvania

Verified on the source

In force

Pennsylvania Uniform Construction Code (34 Pa. Code Ch. 401-405): 2021 I-Codes as amended by the RAC (IBC, IEBC, IRC, IECC, IPC, IMC, IFGC, ISPSC, IWUIC), effective Jan 1, 2026

Reg. #12-125 (final-omitted; IRRC approved Oct 16, 2025; published Nov 8, 2025) adopted nearly all 2021 ICC provisions; IEBC omits storm-shelter Section 1106. 2021 accessibility updates remain enjoined (Commonwealth Court, Oct 26, 2022).

Source: primary document

Who enforces it

Municipalities that opted in enforce through certified code officials or third-party agencies; L&I enforces where a municipality opted out; the Review and Advisory Council (RAC) reviews ICC editions and L&I adopts by regulation

Statewide layer. County and city amendments sit on top; the building view resolves them from your ZIP.

What changes next

Comments due Oct 4, 2026

2024 I-Code review at the RAC: public comments on any 2024 section due Oct 4, 2026; no adoption or effective date set

Questions about the building code in Pennsylvania

Which building code applies in Pennsylvania today?

Pennsylvania Uniform Construction Code (34 Pa. Code Ch. 401-405): 2021 I-Codes as amended by the RAC (IBC, IEBC, IRC, IECC, IPC, IMC, IFGC, ISPSC, IWUIC), effective Jan 1, 2026. Reg. #12-125 (final-omitted; IRRC approved Oct 16, 2025; published Nov 8, 2025) adopted nearly all 2021 ICC provisions; IEBC omits storm-shelter Section 1106. 2021 accessibility updates remain enjoined (Commonwealth Court, Oct 26, 2022).

Who enforces the building code in Pennsylvania?

Municipalities that opted in enforce through certified code officials or third-party agencies; L&I enforces where a municipality opted out; the Review and Advisory Council (RAC) reviews ICC editions and L&I adopts by regulation.

What changes next for the building code in Pennsylvania?

Comments due Oct 4, 2026. 2024 I-Code review at the RAC: public comments on any 2024 section due Oct 4, 2026; no adoption or effective date set