Permitting Authorities / Town of Mt. Crested Butte Building Division
Do you need a permit to replace a roof in Mt. Crested Butte, CO?
Adopted code
Town of Mt. Crested Butte Building Division
Yes — a permit is required to replace a roof in Mt. Crested Butte, CO, issued by Town of Mt. Crested Butte Building Division. Per the Building Division landing page, "Building functions within the department include the implementation and enforcement of all laws, ordinances, and codes that govern development within town limits." Projects go through Design & Permit Review before Building Permit Review/Issuance, then applicants "must schedule inspections for the property," including "town of Mt. CB inspections, electrical, plumbing, fire, and water/sewer" (per the Inspections page, the Town itself schedules only its own building-department inspections — footer, stem wall, slab, culvert/valley pan, rough-in, flow fill, framing, energy & insulation, drywall, and final; electrical is permitted/inspected by the State of Colorado, plumbing by a state plumbing inspector, fire-system inspections by the Crested Butte Fire Protection District, and water service line inspections by the Mt. Crested Butte Water & Sanitation District). Ordinance No. 6, Series 2024 also sets a local ice-barrier amendment for all roofs and a Gunnison County Building Contractor license requirement. No Town page states in so many words that "a permit is required to reroof" (general language covers "new construction, alterations, and remodels," and the Interior Remodel Permit Policy referenced on the FAQs page was not retrievable), so whether a standalone re-roof permit is required is unconfirmed; the Colorado Wildfire Resiliency Code, adopted by the Town, does explicitly apply to "re-siding or re-roofing projects impacting 25% or more of the structure.".
Jurisdiction
Town of Mt. Crested Butte, Colorado
Address
911 Gothic Road, Mt. Crested Butte, CO 81225
Contact
- url: https://mtcb.colorado.gov/building
- phone: 970-349-6632
Roofing permit required
Required
Contractor registration required
Required
Registration details
- license: Per Town of Mt. Crested Butte Ordinance No. 6, Series 2024 (local amendments to the IBC and IRC): "All building permit applications for new construction shall include proof of a current Gunnison County Building Contractor license. The license shall be the type (Class A, Class B, or Class C) associated with the scope of work for the building permit application," and the same requirement applies to "additions and level 2 and level 3 alterations governed by the International Existing Building Code (IEBC) and International Building Code (IBC)" (IBC track) and to "additions and Reconstructions per Appendix AJ of the International Residential Code (IRC)" (IRC/residential track), with the building official having "discretion to waive this requirement." An exemption exists for "Property owners of an individual R1, R2, or R3 unit acting as their own contractor who provide proof of passing the contractor test associated with the Gunnison County contractor license."
Permit process note
Per the Building Division landing page, "Building functions within the department include the implementation and enforcement of all laws, ordinances, and codes that govern development within town limits." Projects go through Design & Permit Review before Building Permit Review/Issuance, then applicants "must schedule inspections for the property," including "town of Mt. CB inspections, electrical, plumbing, fire, and water/sewer" (per the Inspections page, the Town itself schedules only its own building-department inspections — footer, stem wall, slab, culvert/valley pan, rough-in, flow fill, framing, energy & insulation, drywall, and final; electrical is permitted/inspected by the State of Colorado, plumbing by a state plumbing inspector, fire-system inspections by the Crested Butte Fire Protection District, and water service line inspections by the Mt. Crested Butte Water & Sanitation District). Ordinance No. 6, Series 2024 also sets a local ice-barrier amendment for all roofs and a Gunnison County Building Contractor license requirement. No Town page states in so many words that "a permit is required to reroof" (general language covers "new construction, alterations, and remodels," and the Interior Remodel Permit Policy referenced on the FAQs page was not retrievable), so whether a standalone re-roof permit is required is unconfirmed; the Colorado Wildfire Resiliency Code, adopted by the Town, does explicitly apply to "re-siding or re-roofing projects impacting 25% or more of the structure."
Adopted code
Per the Building Division landing page: "The Mt. Crested Butte Town Council approved an Ordinance adopting the 2021 International Building Codes and the Colorado Model Electric Ready and Solar Ready Code, which is in effect as of January 3, 2025," listing: 2021 International Building Code, 2021 International Residential Code, 2021 International Fire Code, 2021 International Mechanical Code, 2021 International Fuel Gas Code, 2021 International Property Maintenance Code, 2021 International Energy Conservation Code, 2021 International Existing Building Code, the Colorado Model Electric Ready and Solar Ready Code, and the Colorado Wildfire Resiliency Code (electrical and plumbing code editions are set by the State of Colorado, which reviews/inspects those trades directly rather than the Town). The instrument behind the Town's I-Code adoptions is Ordinance No. 6, Series 2024, recorded in the Town's own Ordinance List and Disposition Table as Ordinance 24-6, adopted September 3, 2024, "Repeals and Replaces Buildings and Building Regulations; Repeals and Replaces Fire Prevention and Protection," codified at Chapters 6 and 8. That ordinance does not adopt the Colorado Wildfire Resiliency Code, and no adopting instrument for that code has been located: codified Chapter 6 runs Articles I through X ending with the Colorado Model Electric Ready and Solar Ready Code, Chapter 8 adopts only the fire code at Section 8-1, and the disposition table records no wildfire ordinance through Ordinance 25-20 of October 21, 2025, which is where the codification currently ends. The Colorado Wildfire Resiliency Code, 8 CCR 1507-39, became a statewide minimum on July 1, 2026 in areas designated wildland-urban interface under that code, after that codification date. Ordinance No. 6, Series 2024 contains a local roofing amendment, Sec. 6-31/6-65 "Ice Barriers for Roofs," reading in relevant part: "An ice barrier shall be installed for all roofs. The ice barrier shall consist of a self-adhering polymer-modified bitumen sheet and shall be installed on the entire roof. Exception: Detached accessory structures not containing conditioned floor area" (stated once each for the IBC and IRC amendment sections). The Town's own "Wildfire Resiliency Code Summary" PDF states the Colorado Wildfire Resiliency Code applies to "New construction" and "Re-siding or re-roofing projects impacting 25% or more of the structure," and requires under "Roofing": "Class A roofing materials required," "Roof valleys: minimum 26-gauge metal," "Gutters and downspouts: noncombustible," and "Vented roof openings: noncombustible, corrosion-resistant mesh with 1/8-inch maximum openings."
Ice & water shield
Required — Town of Mt. Crested Butte Ordinance No. 6, Series 2024, Sec. 6-65 amends International Residential Code Section R905.1.2 in its entirety: "Section R905.1.2, Ice Barriers. An ice barrier shall be installed for all roofs. The ice barrier shall consist of a self-adhering polymer-modified bitumen sheet and shall be installed on the entire roof. Exception: Detached accessory structures not containing conditioned floor area." (A parallel IBC-track amendment appears at Sec. 6-31, amending Section 1507.2.8.2, with identical operative text.) This is a local ice-barrier-underlayment mandate under the IRC roof-covering chapter and is distinct from the separately-adopted Colorado Wildfire Resiliency Code's Class A roof-covering (ignition-resistance) requirement, which this record does not use to support impact-resistance or ice-barrier fields.
About ice & water barrierImpact-resistant roofing
Not required — Town of Mount Crested Butte Ordinance No. 6, Series 2024, was read in full. Article II adopts the 2021 International Building Code by reference and Article III the 2021 International Residential Code, each subject to the amendments the ordinance sets out. Its roofing amendments are confined to ice barriers: Section 6-31 replaces International Building Code Section 1507.2.8.2 in its entirety, and Section 6-65 replaces International Residential Code Section R905.1.2 in its entirety, each requiring an ice barrier on roofs. Neither the adopted codes nor any Town amendment imposes an impact-resistance requirement on roof coverings, and the ordinance names no UL 2218 or Class 4 standard. The Colorado Energy Office Statewide Building Code Adoption dataset, revised April 2, 2026, likewise reports a 2021 adoption for the Town.
Sales & use tax
9.9% combined. The Town of Mt. Crested Butte is a self-collecting home-rule municipality; its own Finance Department "Retail & Food Sales Tax" page states: "Businesses should be collecting 9.9% on all goods sold in Mt. Crested Butte," itemized as "State of Colorado Tax 2.9%, Gunnison County Tax 1.0%, Special District - Rural Transportation Authority (RTA) 1.0%, Town of Mt. Crested Butte Tax 5.0%, Total 9.9%." This matches CO DOR DR 1002's Home Rule Cities table (Town rate 5%) and its Gunnison County (1%) and "Gunnison Valley" RTA (1%) rows.
Local roofing hub
Roof permits nearby — Gunnison County
Related guides
The building permit authority for the Town of Mt. Crested Butte, Gunnison County. The Building Division "is responsible for administering the town's building codes through the permitting process," including implementation and enforcement of "all laws, ordinances, and codes that govern development within town limits," plus building design review preparation for Planning Commission and DDA-district compliance review. The town's older site, mtcrestedbuttecolorado.us (a GovOffice-hosted site with stale content, e.g. a 2020 COVID work-from-home notice still on its homepage), has been superseded by the current official site, mtcb.colorado.gov.
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