Pennsylvania Uniform Construction Code: Stairs & Guards

Pennsylvania builds to its statewide Uniform Construction Code (UCC). The UCC’s residential provisions moved to the 2021 IRC for new permit applications from 1 January 2026; permits filed before that date continue under the prior 2018 IRC-based edition. Confirm which edition applies to your specific permit with your local code official.

No confirmed Pennsylvania-specific stair or guard amendment surfaced — figures follow the IRC baseline for whichever edition applies. See the US stair & guard rules for the shared figures, and confirm the current edition before relying on these figures — an official statewide source wasn’t available for this page.