Louisville Plumbing & Fuel Gas Code Amendments

City or town · Boulder County · Colorado

Plumbing code: 2024 IPC
Fuel gas code: 2024 IFGC
Effective: Dec 6, 2025
Adopted by: Ord. No. 1907-2025
Local amendments: 9

Louisville doesn't use the model plumbing and gas codes exactly as printed. It adopted the 2024 IPC and 2024 IFGC and then made 9 local changes. Some are paperwork, like permits and fees. Others change what you build in the field, including building sewer depth, venting, backflow prevention. If you bid off the model book alone, you can miss them. CodeCheck Colorado lists every one in plain English with the official source.

What is Louisville's building sewer depth requirement?

1 local change on this topic · Free sample

Louisville: building sewers at least 36 in. below grade, including at the septic tank (IPC 305.4.1).

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What are Louisville's local venting rules?

2 local changes on this topic

Louisville sets its own rule for venting. Sign in to see the rule and ordinance.

What are Louisville's backflow prevention rules?

1 local change on this topic

Louisville sets its own rule for backflow prevention. Sign in to see the rule and ordinance.

How does Louisville handle plumbing tests and inspections?

2 local changes on this topic

Louisville sets its own rule for plumbing tests and inspections. Sign in to see the rule and ordinance.

What permit and fee rules does Louisville add?

4 local changes on this topic

Louisville sets its own rule for permits and administration. Sign in to see the rule and ordinance.