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Permitting Authorities / Colorado / Grand County Building Division - Community Development

Do you need a permit to replace a roof in Unincorporated Grand County, CO?

Adopted code

Grand County Building Division - Community Development

Yes, a permit is required to replace a roof in Unincorporated Grand County, CO, issued by Grand County Building Division - Community Development. Under the Grand County Roofing Guidelines, a self-adhering waterproof membrane must extend from the eaves to at least 6 feet above the outside wall and 30 inches above the centerline of valleys on habitable structures, metal roofs must prevent snow shedding onto exits and walkways with snow-stops installed per manufacturer recommendation, and overlay re-roofs are limited to a maximum of two layers. Separately, the County's 2021 IRC local amendments print, within the amended Table R301.2(1) block: "ADDITIONALLY, THE CHANGING OF ROOFING MATERIALS AND ROOF COVERINGS OTHER THAN LIKE MATERIALS MAY REQUIRE A ROOF EVALUATION FROM A LICENSED COLORADO ENGINEER." A Grand County re-roof that switches covering type - asphalt shingle to tile or metal, for instance - can therefore trigger an engineer's roof evaluation that a like-for-like replacement would not.

Roof code checklist: Unincorporated Grand County, CO

ItemAnswerCode citeSourceVerified
Permit to replace a roofYesco.grand.co.us2026-08-03
Repair permit thresholdNot published
Layer limit / roof-overPublishedco.grand.co.us2026-08-03
Deck & sheathingNot published
Drip edgeYesR905.2.8.5co.grand.co.us2026-08-03
Ice & water shieldYesR905.1.2co.grand.co.us2026-08-03
Mid-roof inspectionNot published
Impact-resistant (Class 4) roofingNoco.grand.co.us2026-08-03
Wind design criteriaPublishedco.grand.co.us2026-08-03
Adopted codePublishedco.grand.co.us2026-07-14
Contractor license / registrationYesco.grand.co.us2026-07-14
Sales & use taxPublishedtax.colorado.gov2026-08-27

Each row comes from the sourced record on this page; full wording is in the table below. "Not published" means no official source for that item was found when the record was last verified.

Jurisdiction
Grand County, Colorado (unincorporated)
Jurisdiction type
county
Address
Hot Sulphur Springs, CO
Contact
  • url: https://www.co.grand.co.us/1114/General-Information
  • phone: 970-725-3255
Permit portal
Permit portal
Roofing permit required
Required
Contractor registration required
Required
Registration details
  • license: Grand County requires contractor registration through a Contractor Registration Application, used for both new registrations and renewals, with related documentation including workers' compensation insurance waiver and contractor verification forms.
Permit process note
Under the Grand County Roofing Guidelines, a self-adhering waterproof membrane must extend from the eaves to at least 6 feet above the outside wall and 30 inches above the centerline of valleys on habitable structures, metal roofs must prevent snow shedding onto exits and walkways with snow-stops installed per manufacturer recommendation, and overlay re-roofs are limited to a maximum of two layers. Separately, the County's 2021 IRC local amendments print, within the amended Table R301.2(1) block: "ADDITIONALLY, THE CHANGING OF ROOFING MATERIALS AND ROOF COVERINGS OTHER THAN LIKE MATERIALS MAY REQUIRE A ROOF EVALUATION FROM A LICENSED COLORADO ENGINEER." A Grand County re-roof that switches covering type - asphalt shingle to tile or metal, for instance - can therefore trigger an engineer's roof evaluation that a like-for-like replacement would not.
Adopted code
Grand County has adopted the 2021 ICC codes (including the 2021 International Residential, Building, Mechanical, Plumbing, Fuel Gas, and Energy Conservation Codes), the 2023 National Electric Code, and the 2025 Colorado Wildfire Resiliency Code with local amendments, effective July 1, 2026, formalized through County Resolutions 2026-4-11 and 2026-6-9.
Drip edge
Required — Not separately amended by Grand County. The county's 2021 IRC local amendments document is a delta document that prints only the sections it amends, in ascending section-number order; it moves directly from Section R905.1.2 (ice barrier) to Section R1004.4, containing no Section R905.2.8.5 entry, so the base 2021 IRC drip-edge requirement stands as adopted code. About drip edge
Ice & water shield
Required — Grand County's Table R301.2(1) amendment prints "ICE BARRIER – YES" as one of the added design-criteria rows. Section R905.1.2 is separately amended to read: "AN ICE BARRIER THAT CONSISTS OF AN APPROVED SELF-ADHERING POLYMER MODIFIED BITUMEN SHEET SHALL BE USED IN LIEU OF NORMAL UNDERLAYMENT ON ALL SLOPED ROOFS. THIS ICE DAM PROTECTION UNDERLAYMENT SHALL BE INSTALLED FROM THE EAVES TO A POINT 6 FEET (1829 mm) INSIDE THE EXTERIOR WALL OF THE BUILDING AND 24 INCHES (610 mm) FROM THE CENTERLINE OF ALL VALLEYS, FULLY ADHERED TO THE SUBSTRATE ON ALL HABITABLE STRUCTURES. Exception: Detached accessory structures not containing conditioned floor area." About ice & water barrier
Impact-resistant roofing
Not required — Grand County's 2021 IRC/IBC local amendments document, a delta document printing only amended sections, contains no UL 2218, Class 4, or impact-resistance provision anywhere.
Wind design criteria
The Grand County local amendments to the 2021 IRC print, under "R301 is amended to read as follows / R301 Design criteria / Table R301.2(1)": "ROOF SNOW LOAD – AS DETERMINED BY GRAND COUNTY SNOW LOAD/SNOW ZONE MAP OR GRAND COUNTY SUBDIVISION INDEX OR A LICENSED COLORADO DESIGN PROFESSIONAL MAY DESIGN THE STRUCTURE TO MEET THE SNOW LOAD REQUIREMENTS OF THE SITE USING THE 2016 COLORADO DESIGN SNOW LOADS... WIND SPEED – 115 MPH a... TOPOGRAPHIC EFFECTS – NO... SEISMIC DESIGN CATEGORY – B... WEATHERING PROBABILITY FOR CONCRETE – SEVERE... FROST LINE DEPTH – 36 INCHES... TERMITE INFESTATION PROBABILTY – NONE TO SLIGHT... ICE BARRIER – YES... FLOOD HAZARDS – NO... AIR FREEZING INDEX – 3000... MEAN ANNUAL TEMP – 40 F." Footnote a reads: "SPECIAL WIND REGIONS EXIST IN GRAND COUNTY AND MAY REQUIRE A LICENSED COLORADO DESIGN PROFESSIONAL TO DETERMINE THE REQUIRED HIGHER BASIC WIND SPEED FOR USE IN STRUCTURAL DESIGN."
Roof layer limit / recover
The Grand County Department of Community Development's "Grand County Roofing Guidelines" handout, signed by the roofing contractor on every Grand County roofing permit, states: "If the project is a re-roof where the old roofing will not be removed, a maximum of two layers of roofing will be allowed. (One layer old, one layer new) Ice and water shield is not required in these cases." I.e. a maximum of two total layers (one existing plus one new) for overlay re-roofs without tear-off.
Sales & use tax
4.20% combined for unincorporated Grand County (state 2.9% + Grand County 1.30%; no RTD/SCFD/RTA district applies to Grand County). Grand County sales tax is state-collected; the Colorado Department of Revenue's DR 1002 (rev. 06/19/19) lists the county's own rate as "Grand 1.30%." Re-verified 2026-08-27 against the January 2026 edition of Colorado Department of Revenue form DR 1002, read from a rendered image of its tables rather than from extracted text: the state, county and city figures above match that edition exactly. Where the text above names the June 19, 2019 revision of DR 1002, that describes the edition the figure was originally taken from and is not a current citation.

Roof permits nearby: Grand County

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The building permit authority for unincorporated Grand County, Colorado, based in Hot Sulphur Springs. A permit is required to perform any construction, alteration, relocation, repair, change of use, or demolition of any building or structure, and all permit requests are submitted online. The county publishes dedicated roofing and re-roofing guidelines covering waterproof membrane installation, snow-stop requirements for metal roofs, and a two-layer maximum for overlay re-roofs, and requires contractor registration.

No NOAA hail reports within 10 miles of the center of Grand County, CO in the last 5 years (data through Oct 7, 2026).

Source: NOAA Storm Prediction Center severe weather database and daily storm reports (reports since the start of the current year are preliminary), within 10 miles of the center of Grand County, CO. Data through Oct 7, 2026, not updated since. A report is an observation, not a damage record.

Working an insurance claim in Unincorporated Grand County, CO? Everything on this page (drip edge, ice & water shield, inspections, Class 4 rules) formatted as a claim-ready evidence pack: verbatim ordinance quotes, code section cites, verification dates, and official source links, ready to attach to a supplement. See a real sample pack (PDF, 4 pages, free).

Code items like drip edge and ice & water shield are what adjusters ask you to document.

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Sources

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Roofing questions: Unincorporated Grand County, CO

Do you need a permit to replace a roof in Unincorporated Grand County, CO?

Yes, a permit is required to replace a roof in Unincorporated Grand County, CO.

Is ice & water shield required in Unincorporated Grand County, CO?

Yes. Grand County's Table R301.2(1) amendment prints "ICE BARRIER – YES" as one of the added design-criteria rows. Section R905.1.2 is separately amended to read: "AN ICE BARRIER THAT CONSISTS OF AN APPROVED SELF-ADHERING POLYMER MODIFIED BITUMEN SHEET SHALL BE USED IN LIEU OF NORMAL UNDERLAYMENT ON ALL SLOPED ROOFS. THIS ICE DAM PROTECTION UNDERLAYMENT SHALL BE INSTALLED FROM THE EAVES TO A POINT 6 FEET (1829 mm) INSIDE THE EXTERIOR WALL OF THE BUILDING AND 24 INCHES (610 mm) FROM THE CENTERLINE OF ALL VALLEYS, FULLY ADHERED TO THE SUBSTRATE ON ALL HABITABLE STRUCTURES. Exception: Detached accessory structures not containing conditioned floor area."

Is drip edge required in Unincorporated Grand County, CO?

Yes. Not separately amended by Grand County. The county's 2021 IRC local amendments document is a delta document that prints only the sections it amends, in ascending section-number order; it moves directly from Section R905.1.2 (ice barrier) to Section R1004.4, containing no Section R905.2.8.5 entry, so the base 2021 IRC drip-edge requirement stands as adopted code.

Can you roof over an existing roof in Unincorporated Grand County, CO?

The Grand County Department of Community Development's "Grand County Roofing Guidelines" handout, signed by the roofing contractor on every Grand County roofing permit, states: "If the project is a re-roof where the old roofing will not be removed, a maximum of two layers of roofing will be allowed. (One layer old, one layer new) Ice and water shield is not required in these cases." I.e. a maximum of two total layers (one existing plus one new) for overlay re-roofs without tear-off.

Do roofing contractors need a license or registration in Unincorporated Grand County, CO?

Yes. Grand County requires contractor registration through a Contractor Registration Application, used for both new registrations and renewals, with related documentation including workers' compensation insurance waiver and contractor verification forms.

What building code does Unincorporated Grand County, CO use?

Grand County has adopted the 2021 ICC codes (including the 2021 International Residential, Building, Mechanical, Plumbing, Fuel Gas, and Energy Conservation Codes), the 2023 National Electric Code, and the 2025 Colorado Wildfire Resiliency Code with local amendments, effective July 1, 2026, formalized through County Resolutions 2026-4-11 and 2026-6-9.