FireApproved
On this page
  1. Why it matters
  2. How it works
  3. The paths
  4. What people mix up
  5. How to check
  6. Limits
  7. Related records

Home / Guides / How the documents differ / Utah WUI code status

Utah WUI code status

Last verified 2026-08-27.

This page is Utah law.

Utah does not run unmodified 2024 IWUIC as a live statewide construction book today. Current 15A-2-103(2) adopts the 2006 Utah Wildland Urban Interface Code as a construction code a local compliance agency may adopt. The same section, as effective 1 January 2027, adopts the 2024 IWUIC. Adopted-but-not-effective is its own truth.

You are looking at a lot in Utah and asking which book binds a new roof. The answer is the local ordinance plus the map the city or county named. 65A-8-203 makes adoption of that WUI building standard a condition of FFSL cooperative-agreement cost share. It is not a parcel read on this site.

Why it matters

Embers do not wait for 2027. Specifying “Utah 2024 IWUIC vents” in 2026 names a book that is not yet in force. Specifying “IWUIC” without the year names the wrong edition. Oregon R327 and California CWUIC are different books.

How it works

Current 15A-2-103 puts IBC, IRC, and the other statewide construction codes in subsection (1). Subsection (2) is the WUI path. It names the 2006 Utah Wildland Urban Interface Code, with alternatives or amendments approved by the Division of Forestry, Fire, and State Lands, as a construction code that may be adopted by local ordinance. The opened 2006 book keeps Chapter 5. Class 1 roofs are a Class A covering or Class A assembly (§504.2). Vents on that path take noncombustible corrosion-resistant mesh with openings not over 1/4 inch (§504.10). That chapter binds only where a local agency adopted the book.

65A-8-203(4)(f) says an eligible entity that wants a cooperative fire-protection agreement shall adopt and enforce those wildland urban interface building standards. 65A-8-203(9)(a) then requires the county to adopt them for unincorporated land and the municipality to adopt them for incorporated land. If they fail, FFSL may choose not to pay cooperative-agreement costs.

FFSL states that House Bill 48, which added that WUI-code hook, took effect 1 January 2026.

The 2024 IWUIC swap is already written. 15A-2-103 as effective 1 January 2027 (amended by Chapter 386, 2026 General Session) adopts the 2024 IWUIC. 65A-8-203(9)(c) gives a county or municipality two years from the date the state adopts a different standard. Do not treat this page as the clock.

65A-8-203(8) requires FFSL to keep an online wildfire risk assessment mapping tool. FFSL points at the Utah Wildfire Risk Assessment Portal. High-risk WUI boundaries on that tool feed fees, triage, and insurer labeling. They are not a construction permit. This site does not read your parcel.

The paths

  1. Local 2006 Utah Wildland Urban Interface Code. Spec the ordinance the building official names.
  2. No local WUI construction book. 65A-8-203 may affect cooperative-agreement cost share. It does not write a roof on this site.
  3. 2024 IWUIC on 1 January 2027. Wait for that effective date. Confirm the local ordinance and any two-year catch-up under 65A-8-203(9)(c).
  4. Harden anyway. IBHS is a designation, not adopted code.

What people mix up

  • Treating the 2024 IWUIC as in force in 2026.
  • Treating a UWRAP high-risk polygon as a building permit.
  • Importing Oregon R327 or California CWUIC onto a Utah drawing.
  • Treating FFSL cooperative-agreement cost share as a lot determination.

How to check

  1. Ask the building official which WUI construction book is adopted, and which map it uses.
  2. Open 15A-2-103. If the page still shows the 2006 edition as current and 2024 as effective 1 January 2027, do not spec 2024 today.
  3. Open the UWRAP portal. Do not treat a high-risk boundary as a construction class. This site does not read your parcel.
  4. If you need cooperative-agreement context, read 65A-8-203 and FFSL’s WUI page.

Limits

This page quotes the 2006 UWUI model text we opened. Taylorsville Ordinance 25-15 and Salt Lake City Code 18.44.010.B (Ord. 68-25) are opened local adoptions. It does not classify a parcel. It does not decide a fee, a triage score, or an insurance premium.

Questions

Does Utah require IWUIC construction on my lot today?

Not as a self-executing statewide book. 15A-2-103 currently adopts the 2006 Utah Wildland Urban Interface Code as a construction code a local compliance agency may adopt. 65A-8-203 requires a county or municipality that wants FFSL cooperative-agreement cost share to adopt and enforce that book. Confirm the local ordinance.

When does the 2024 IWUIC take effect?

15A-2-103 as effective 1 January 2027 adopts the 2024 International Wildland-Urban Interface Code. Until that date, the 2006 Utah Wildland Urban Interface Code is the edition named in the current section.

Where is the official map?

65A-8-203(8) requires FFSL to keep an online wildfire risk assessment mapping tool. FFSL points at the Utah Wildfire Risk Assessment Portal. High-risk WUI boundaries on that tool are not a construction permit.

What if my city has not adopted the 2006 book?

65A-8-203(9)(b) lets FFSL choose not to pay cooperative-agreement costs if a county or municipality fails to adopt and enforce the standard. That is a funding hook, not a lot determination.

Did Salt Lake City adopt the Utah WUI construction book?

Yes, locally. 18.44.010.B (Ord. 68-25, 2025) adopts the Utah Wildland Urban Interface Code as adopted by 15A-2-103, on property shown on the Salt Lake City Wildland Urban Interface Map. 15A-2-103 currently names the 2006 book.

Sources