Guide · Code changes

Which Colorado cities adopted the 2024 plumbing and gas codes?

Updated Oct 17, 2026

In 2025 and 2026 much of the Front Range moved to the 2024 IPC and IFGC. The state’s plumbing and fuel gas code has been based on the 2024 editions since Aug 14, 2026, and 22 cities and counties listed below have switched, each with its own local amendments. Check the date a city’s new code took effect before you bid.

Has Colorado adopted the 2024 plumbing code statewide?

Yes. The state minimum plumbing and fuel gas code (3 CCR 720-1) is based on the 2024 IPC, 2024 IFGC and 2024 IRC with Colorado changes, effective Aug 14, 2026. The previous 2021-based version was in force from Apr 14, 2023 to Aug 13, 2026.

The state code is the minimum everywhere, and the state inspects where no local building department issues plumbing permits. Cities and counties must meet the new state minimums within 12 months, and they adopt their own editions on their own schedules.

Which cities and counties switched to the 2024 codes, and when?

City or countyCodeIn effectAdopted by
Thornton2024 IPC and IFGCJul 1, 2025Ord. No. 3731
Littleton2024 IPC and IFGCJul 25, 2025Ord. No. 11
Boulder2024 IPC and IFGCAug 1, 2025Ordinance No. 8684, Ordinance No. 8720
Palisade2024 IPC and IFGCSep 1, 2025Ordinance 008
Wheat Ridge2024 IPC and IFGCOct 27, 2025Ord. No. 1833
Louisville2024 IPC and IFGCDec 6, 2025Ord. No. 1907-2025
Denver2024 IPC and IFGCDec 31, 2025Ord. No. 735-25, Ord. No. 1634-25
Milliken2024 IPC and IFGCJan 1, 2026Ordinance No. 2025-834
Arvada2024 IPC and IFGCApr 1, 2026Ord. No. 4921
Fort Collins2024 IPC and IFGCApr 1, 2026Ord. 218
Broomfield2024 IPC and IFGCApr 15, 2026Ordinance No. 2295
Englewood2024 IPC and IFGCJun 1, 2026Ord. No. 23-2026
Glendale2024 IPC and IFGCJun 23, 2026Ord. 2026-1
Castle Rock2024 IPC and IFGCJun 30, 2026Ord. No. 2026-017
Parker2024 IPC and IFGCJun 30, 2026Ord. No. 4.95.6, Ord. No. 4.97.6
Adams County2024 IPC and IFGCJul 1, 2026Ordinance No. 12
Douglas County2024 IPC and IFGCJul 1, 2026Board of County Commissioners resolution 'to Amend the Douglas County Building C
Jefferson County2024 IPC and IFGCJul 1, 2026Adopted by Board of County Commissioners resolution
Longmont2024 IPC and IFGCJul 1, 2026Ord. No. O-2026-27, Ord. No. O-2026-26
Loveland2024 IPC and IFGCJul 1, 2026Ord. 6812 (IPC), Ord. 6811 (IFGC)
Lafayette2024 IPC and IFGCAug 1, 2026Ord. No. 12, Ord. No. 2026-12
Northglenn2024 IPC and IFGCOct 11, 2026CB-2039

Which cities are switching next?

The most recent switch in the app is Northglenn: it adopted the 2024 codes on Jul 13, 2026, and they took effect Oct 11, 2026. New adoptions are added to the app and to this table as they happen.

Which cities are still on the 2021 or 2018 code?

Among the jurisdictions in the app: Arapahoe County (2021), Aurora (2021), Boulder County (2021), Brighton (2021), Castle Pines (2021), Centennial (2021), Commerce City (2021), Eagle County (2021), Edgewater (2021), Erie (2021), Federal Heights (2021), Greeley (2021), Greenwood Village (2018), Lakewood (2021), Lone Tree (2021), Sheridan (2021), Westminster (2021). See every jurisdiction on the coverage list.

Which edition applies to my permit?

It depends on the city. Fort Collins, for example, applies the 2024 codes to permits submitted on or after Apr 1, 2026, so the application date decides it there. The app shows each city’s effective date.

Do local amendments carry over to the new edition?

Not automatically. When a city adopts a new edition it re-adopts its amendments, and it often changes them. Section numbers can move too. The app tracks the amendments for the edition each city has in effect.