09/03/2026
Your building permit was approved under the 2018 codes. Your trade permits are being submitted now.
Philadelphia's L&I does not allow mixing code editions within a single plan set. Trade permits submitted after July 1 must comply with the 2021 codes, even if the building permit was approved under the 2018 codes. If the 2021 requirements conflict with the original building design, the building permit will need to be amended before trade permits can move forward.
The same rule applies to Planned Unit Developments. If the Master Plan was approved under the 2018 codes but not all related permits were filed before July 1, any remaining applications must be submitted under the 2021 codes regardless of when the Master Plan was originally approved.
Read more at permitphilly.com/2026/07/21/philadelphia-2021-building-codes/
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