Teton County, Wyoming - Planning & Building Department

Teton County, Wyoming

county

200 South Willow Street, Jackson, WY 83001

Required

Required

The Building Department's own Table 1, "When Permits Are Required" (County Building Codes Resolution, effective July 1, 2025), lists "Replacement of Roof" as requiring a Building permit with Building Division review -- in contrast to exterior siding repair or replacement, which the same table marks as not requiring a permit. The Department's own permitting page separately names Re-Roof by name alongside Mechanical, Plumbing and Demo as one of the permit types routed through its Trade Permit process -- applied for through the same online portal, without the submission-week scheduling required for new construction (the page states that this group of trade permits is typically issued within 48 hours of a complete submittal). Inspections on an open permit must occur at least every 180 days to keep the permit active.

2024 International Residential Code and 2024 International Building Code, both adopted by the County Building Codes Resolution (Section 6, Adoption of Technical Codes), effective July 1, 2025, with the 2024 International Plumbing, Mechanical and Fuel Gas Codes adopted alongside. The Department's own building page states that permits submitted on or after February 1, 2025 must use the 2024 IRC and IBC edition. Wyoming has no statewide residential building code of its own -- the state's adopted codes (2024 IBC, IFC, IMC, IFGC under a Council on Fire Prevention and Electrical Safety rule) do not reach one- and two-family dwellings, and the IRC is not adopted by the state at all -- so this county-level adoption is the entire source of the applicable residential code here. The County's amendment list additionally requires a minimum Class B fire rating for all new roofing and re-roofing (IRC R904.1 / IBC 1505.1) and states that all of Teton County lies within the Wildland Urban Interface.

Required — Required by the base 2024 International Residential Code as adopted by County Building Codes Resolution Section 6. The County's own IRC amendment list (Section 7), read in full, touches Chapter 9 only at Table R301.2 (climatic design criteria), Section R115 (contractor licensing) and Section R904.1 (a Class B fire-rating sentence) -- it does not amend, delete or except the base code's drip-edge provision, which stands as adopted. About drip edge

Required — County Building Codes Resolution Section 7 amends IRC Table R301.2, Climatic and Geographic Design Criteria, to state "Ice Barrier Underlayment Required: YES" for Teton County, alongside Weathering "D1, D2" and a 34-inch frost line depth. The County's separate Design Criteria reference page republishes the identical figure. Neither document gives a numeric extension distance; the base 2024 IRC's own ice-barrier extension provision, triggered by this designation, was not independently read this session. About ice & water barrier

Not required — The County's complete IRC and IBC amendment lists (County Building Codes Resolution, Section 7) were read in full and neither amends any impact-resistance provision, and neither mentions UL 2218 or a Class 4 impact rating anywhere. The only roof-covering amendment in either code is a new sentence at IRC R904.1 / IBC 1505.1 requiring "a minimum class B rating" for new roofing and re-roofing -- a FIRE classification (ASTM E108/UL 790), not an impact rating, and it imposes no UL 2218 or Class 4 requirement. The Building Department separately states that all of Teton County lies within the Wildland Urban Interface, which is also a wildfire-exposure designation, not an impact-resistance requirement.

County Building Codes Resolution Section 7 amends IRC Table R301.2 to set "Wind Speed: 105 MPH" for Teton County (footnote: the basic wind speed of 105 mph is taken from the IRC wind speed map, with wind exposure category determined on a site-specific basis under Section R301.2.1.4), with no Special Wind Region and no Windborne Debris Zone designated. The same table sets Seismic Design Category D and directs that ground snow load be taken from the ASCE Hazard Tool (ascehazardtool.org) rather than a single fixed figure, since snow load in this mountainous county varies by site elevation. The County's separate Design Criteria reference page republishes the same 105 mph wind speed and Seismic Design Category D.

Teton County adopted the 2024 International Residential Code by its own County Building Codes Resolution (Section 6, Adoption of Technical Codes), effective for permits submitted on or after February 1, 2025. The Resolution's full IRC amendment list (Section 7) was read start to finish and amends Table R301.2 (climatic design values), adds a Section R115 contractor-licensing requirement, and adds one sentence to R904.1 setting a minimum Class B fire rating for new roofing and re-roofing. It contains no amendment, deletion or exception touching the roof re-covering or roof-replacement layer-count provisions of Chapter 9. So the operative limit on re-covering an existing roof in unincorporated Teton County is whatever the base 2024 IRC's own reroofing section requires, as adopted and left unmodified by the County. That base-code text sits behind a JavaScript-rendered viewer at the publisher's site that could not be read this session, so this record does not restate a specific layer count or quote the base code's operative condition -- only the county's own amendment list, which is silent on the point, is reported here.

Teton County's own IRC amendment list (County Building Codes Resolution, Section 7), read in full, contains no amendment to the roof sheathing provisions of IRC Chapter 8 and no reference to roof decking material, fastening or span requirements anywhere in its Residential or Building Code amendments. The base 2024 International Residential Code's sheathing requirements therefore apply in unincorporated Teton County unmodified by any county amendment.

7% total sales/use tax in Teton County outside the resort districts (4% state + 1% general-purpose county option + 2% specific-purpose county option), per the Wyoming Department of Revenue Excise Tax Division rate chart effective 07/01/2026 and unchanged on the 10/01/2026 chart. Two small resort-district overlays inside the county carry an additional 2% resort district tax for a 9% total: the Teton Village Resort District and the Grand Targhee Resort District. Wyoming has no municipal sales tax, so outside those two named districts the county rate applies countywide, including in the unincorporated areas this record covers.