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2021 Uniform Plumbing Code | UPC

The 2021 Uniform Plumbing Code was adopted on October 25, 2023, and became effective on January 2, 2023.

Last updated: December 26, 2023

2021 Code Words

2021 Code Words provide interpretations, written policies, and procedures to aid in the application of construction code. 

Last updated: September 15, 2025

iPermits Acknowledgement Form (CE1240)

Application to request an iPermits portal account for a licensed contractor and advance pay accounts (APA or SR).

Last updated: 03-18-2024

Prescriptive Method: R-Value Computation (CE1415)

Last Updated: August 20, 2025.

11-02-M Concrete Retaining Wall
Calculation of Impervious Percentage (CE1207)

A tool to assist in determining the amount of impervious area as a percentage on lots 15,000 square feet or less.

Last updated: 5.3.2021

iPermits How to Purchase a Trade Permit

How to guide for purchasing a trade permit online through iPermits portal.

2015-B35 Solar APP Alternate Method

This Code Word is provided as an interpretation that the use of the Department of Energy (DOE) SolarAPP+ computer program is an approved alternate method.

Last updated: Sep. 27, 2022

Post Install Solar Inspection Letter (CE-1387b)

This is an example inspection letter for a Solar APP+ project. For an example of a typical solar panel system, refer to form CE-1387a.

Last updated: Nov. 17, 2022 

Solar APP+ Application Guidelines_CE-1410

Last Updated: June 20, 2025.