34 Pa. Code § 403.27 – Applicability and use of standards.

(a) Portions of this chapter designate and incorporate portions of the following ICC copyrighted works:
1. (1) The ‘‘International Building Code of 2021.’’
2. (2) The ‘‘International Residential Code of 2021.’’
3. (3) The ‘‘International Plumbing Code of 2021.’’
4. (4) The ‘‘International Mechanical Code of 2021.’’
(b) The ‘‘International Residential Code of 2021’’ and the ‘‘International Existing Building Code of 2021’’ apply to the construction, alteration, movement, enlargement, replacement, repair, equipment, use and occupancy, location, removal and demolition of detached one- and two-family dwellings and multiple single-family dwellings no more than three stories in height with a separate means of egress and their accessory structures.
(c) The ICC owns the copyrighted works in subsection (a). Reproduced with permission. All rights reserved.
(d) If different sections of this chapter specify different materials, method of construction or other requirements, the most restrictive material, method of construction or other requirement shall govern. The specific requirement of this part applies if there is a conflict between a general requirement and a specific requirement.
(e) This chapter governs if there is a conflict between this chapter and the provisions of the codes relating to administration incorporated under § 403.21(a) (relating to Uniform Construction Code).
(f) A provision of the ‘‘International Mechanical Code of 2021’’ does not apply if the provision conflicts with the Boiler and Unfired Pressure Vessel Law (35 P.S. § § 1331.1—1331.18).

Authority

The provisions of this § 403.27 amended under section 304(a)(1) and (2) of the Pennsylvania Construction Code Act (35 P.S. § 7210.304(a)(1) and (2)).

Source

The provisions of this § 403.27 amended December 24, 2009, effective December 31, 2009, 39 Pa.B. 7196; amended September 29, 2018, effective October 1, 2018, 48 Pa.B. 6261; amended February 11, 2022, effective February 14, 2022, 52 Pa.B. 971; amended November 7, 2025, effective January 1, 2026, 55 Pa.B. 7701. Immediately preceding text appears at serial pages (408699) to (408700).

Cross References

This section cited in 34 Pa. Code § 403.21 (relating to Uniform Construction Code).