Longmont Plumbing & Fuel Gas Code Amendments

City or town · Boulder / Weld County · Colorado

Plumbing code: 2024 IPC
Fuel gas code: 2024 IFGC
Effective: Jul 1, 2026
Adopted by: Ord. No. O-2026-27, Ord. No. O-2026-26
Local amendments: 38

Longmont doesn't use the model plumbing and gas codes exactly as printed. It adopted the 2024 IPC and 2024 IFGC and then made 38 local changes. Some are paperwork, like permits and fees. Others change what you build in the field, including building sewer depth, gas piping, venting. 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 Longmont's building sewer depth requirement?

2 local changes on this topic · Free sample

Longmont: building sewers at least 36 in. below grade (IPC 305.4.1).

1 more Longmont rule on this topic in the app. Sign in or start a free trial.

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What does Longmont change about gas piping?

1 local change on this topic

Longmont sets its own rule for gas piping. Sign in to see the rule and ordinance.

What are Longmont's local venting rules?

2 local changes on this topic

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

What are Longmont's backflow prevention rules?

1 local change on this topic

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

How does Longmont handle plumbing tests and inspections?

2 local changes on this topic

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

What is Longmont's rule on graywater systems?

3 local changes on this topic

Longmont sets its own rule for graywater. Sign in to see the rule and ordinance.

What permit and fee rules does Longmont add?

20 local changes on this topic

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