Gilcrest, Colorado has adopted: 2018 International Residential Code (IRC) — confirmed as the operative residential code from the title block of the Town's own SAFEbuilt-published 'Building Guides for Homeowners' series (Re-Roofing, Additions to Single Family Dwellings, Accessory Structures, Patio Covers/Carports, Decks, Pole Barns, Window Replacement, Swimming Pools — all titled '2018 IRC' and published/revised 5.10.2019), which are the Town's own currently-linked permitting handouts as of the last verification; National Electrical Code: the Town's own 'Residential Electrical Wiring Guidelines' handout (SAFEbuilt Colorado, last revised 1/28/2010) cites 2008 NEC provisions such as tamper-resistant receptacle requirements, and the Manufactured Housing Installation Permits handout states that manufactured-home electric service 'shall be installed in accordance with 2008 National Electric Code (NEC)'. That is the most recent NEC edition cited in any Town-published document, and it is materially older than current practice — no more recent Town-published NEC citation exists after checking the Building Permit Application, the Electrical Permit Resolution (2016-12) and both Contemporaneous Review Guidelines documents, none of which state an edition. Confirm the enforced edition with the Town before designing.; Building Permit Fee valuation table: the Town's 'Building Inspection and Plan Review Fees' handout (undated, current as of the last verification since it is reproduced verbatim as an exhibit to the Amended 2025 Fee Schedule effective 5/1/2025) explicitly states fees are 'Based on Table 1A of the 97 Uniform Building Code' (i.e., the 1997 Uniform Building Code, a legacy pre-IRC/IBC code family) — this is a fee-calculation table only, not a statement that Gilcrest enforces 1997 UBC construction/life-safety provisions; the same handout separately states project valuations are based on 'the most current Building Valuation Data published by the International Code Council,' which is inconsistent with a static 1997-vintage fee table and is flagged here rather than silently reconciled; Colorado is a home-rule state with no statewide-mandated building code edition; Gilcrest is a statutory (non-home-rule) town, so its own municipal code and adopted-code ordinance govern. The Town's Municipal Code (hosted on Municode) is not independently confirmed here as a supplementary source for code-adoption ordinance language — see tipsAndGotchas.; HB22-1362 statewide energy code floor (2021 IECC + electric-readiness/EV-ready/solar-ready requirements, effective window July 2023-July 2026): no Town-published document reviewed states an adopted IECC edition or references HB22-1362 compliance; the 2018 IRC guide series (Home Additions, Accessory Structures) does reference 'Energy Code Compliance Report (www.energycodes.gov) or REScheck calculations' as a required submittal item, which points toward some energy-code enforcement in practice, but no specific IECC edition or HB22-1362 statement was found in any Gilcrest-published source. This should be treated as an open item pending direct confirmation from the Building Department (970-737-2426) rather than assumed either way.; International Building Code, 2018 edition — adopted at Municipal Code Sec. 18-1 (Chapters 1 through 35 inclusive). Gilcrest Municipal Code Chapter 18 (Building Regulations) on library.municode.com, codified through Ordinance No. 2023-06, adopted 2023-08-07 (Supplement 25).; International Residential Code, 2018 edition — adopted at Municipal Code Sec. 18-21 (Chapters 1 through 43 inclusive). See Gilcrest Municipal Code Chapter 18 (Building Regulations) on library.municode.com. Codified through Ordinance No. 2023-06, adopted 2023-08-07 (Supplement 25).; International Mechanical Code, 2018 edition — adopted at Municipal Code Sec. 18-61 (Chapters 1 through 15 inclusive). Gilcrest Municipal Code Chapter 18 (Building Regulations), library.municode.com. Codified through Ordinance No. 2023-06, adopted 2023-08-07 (Supplement 25).; International Plumbing Code, 2018 edition — adopted at Municipal Code Sec. 18-71 (Chapters 1 through 13 inclusive). Gilcrest Municipal Code Chapter 18 (Building Regulations) on library.municode.com, codified through Ordinance No. 2023-06, adopted 2023-08-07 (Supplement 25).; International Fuel Gas Code, 2018 edition — adopted at Municipal Code Sec. 18-101 (Chapters 1 through 8 inclusive). Gilcrest Municipal Code Chapter 18 (Building Regulations) on library.municode.com, codified through Ordinance No. 2023-06, adopted 2023-08-07 (Supplement 25).; International Fire Code, 2012 edition — adopted at Municipal Code Sec. 18-201, including Appendices. Gilcrest Municipal Code Chapter 18 (Building Regulations) on library.municode.com, codified through Ordinance No. 2023-06, adopted 2023-08-07 (Supplement 25).; International Existing Building Code, 2018 edition — adopted at Municipal Code Sec. 18-301 (Chapters 1 through 16 inclusive). Gilcrest Municipal Code Chapter 18 (Building Regulations), on library.municode.com. Codified through Ordinance No. 2023-06, adopted 2023-08-07 (Supplement 25).; International Property Maintenance Code, 2018 edition — adopted at Municipal Code Sec. 18-401 (Chapters 1 through 8 inclusive). Gilcrest Municipal Code Chapter 18 (Building Regulations) on library.municode.com, codified through Ordinance No. 2023-06, adopted 2023-08-07 (Supplement 25).; International Energy Conservation Code, 2021 edition — adopted at Municipal Code Sec. 18-501, within Gilcrest Municipal Code Chapter 18 (Building Regulations) as codified on library.municode.com. Codified through Ordinance No. 2023-06, adopted 2023-08-07 (Supplement 25).; International Swimming Pool and Spa Code, 2018 edition — adopted at Municipal Code Sec. 18-551 (Chapters 1 through 11 inclusive), Gilcrest Municipal Code Chapter 18 (Building Regulations). Codified through Ordinance No. 2023-06, adopted 2023-08-07 (Supplement 25).; The IBC, IECC, IMC, IPC, and IFGC are each adopted, by section, in Municipal Code Chapter 18 (library.municode.com). The Fire Code edition is worth noting separately: 2012, while every other adopted code is 2018 or 2021.. Local amendments apply — see the Gilcrest overview page for the full list.