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Benton County, WA Building Safety: Fire Sprinkler Requirements (2026)

Some Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified August 2026

Key Facts

Governing section
BCC 3.16.042 (Fire Code); mirrored at 3.04.041 (Building Code)
Base code amended
Section 903.2, 2021 International Fire Code
Local exception
Hop processing/storage facilities and telecom equipment spaces
Related requirement
Key boxes required for sprinklered premises, BCC 3.16.041
First violation penalty
Civil penalty up to $500, BCC 3.16.045

Summary

Benton County amends Section 903.2 of the 2021 International Fire Code under BCC 3.16.042 to require approved automatic sprinkler systems in new buildings and structures in the locations the Fire Code lists, carving out a local exception for hop processing and storage facilities and certain telecommunications equipment spaces.

These county ordinances apply to unincorporated areas of Benton County. Incorporated cities within the county may have their own rules that take precedence over county-level regulations.

3.16.042 AUTOMATIC SPRINKLER SYSTEM-WHERE REQUIRED. Section 903.2 of the 2021 Edition of the International Fire Code shall be amended to read as follows: Approved automatic sprinkler system in new buildings and structure shall be provided in the locations described in Section 903.2.1 through 903.2.12. Exceptions: Hop processing and storage facilities and spaces or areas in telecommunications buildings used exclusively for telecommunication equipment, associated electrical power distribution equipment, batteries and standby engines, provided those facilities and spaces or areas are equipped throughout with an automatic smoke detection system if required by the terms of Section 907.2.

Full Breakdown

042, most recently amended by Ord. 12 of that code, which set sprinkler triggers by occupancy group. 2, and are separated from the rest of the building by at least a 1-hour fire barrier under Section 707 or a 2-hour horizontal assembly under Section 711 of the International Building Code. 2 of the International Building Code. 041 for any premises with a water-based automatic sprinkler system or automatic fire detection system, or where the local Fire District Fire Chief requires one, with the type and location of the box set by that Fire District.

The Benton County Building Department administers these Fire Code amendments, and the code does not create a blanket sprinkler mandate for existing one- and two-family dwellings; it applies to new buildings and structures per the referenced occupancy tables.

Violations & Fines

A first violation of BCC Chapter 3.16 is a civil penalty not to exceed $500, plus court costs, under BCC 3.16.045(a); a person or contractor who commits a second or subsequent violation of the same provision faces enhanced enforcement under that section. Premises found without a required key box despite an installed sprinkler system are likewise subject to Chapter 3.16 enforcement.

Frequently Asked Questions

Does Benton County require sprinklers in every new building?
BCC 3.16.042 amends Section 903.2 of the 2021 International Fire Code to require sprinklers in new buildings and structures in the locations described in Sections 903.2.1 through 903.2.12 of that code, which set the trigger by occupancy group rather than applying a blanket rule to every structure.
Are any Benton County buildings exempt from the sprinkler rule?
Yes. Hop processing and storage facilities and certain telecommunications equipment spaces are exempt if they carry an automatic smoke detection system under Section 907.2 and are separated from the rest of the building by a 1-hour fire barrier or 2-hour horizontal assembly.
Do sprinklered buildings in Benton County need a key box?
Yes. BCC 3.16.041 requires a key box for any premises with a water-based automatic sprinkler system or automatic fire detection system, or wherever the local Fire District Fire Chief requires one; the Fire District sets the box's type and location.
What is the penalty for violating Benton County's Fire Code sprinkler rule?
A first violation of BCC Chapter 3.16 is a civil penalty not to exceed $500 plus court costs under BCC 3.16.045(a), with escalated enforcement for a second or subsequent violation of the same provision.

Sources & Official References

Other rules in Benton County

All Benton County rules

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