Washington Statewide Rule

Washington State Propane Storage Safety Regulations

Some RestrictionsApplies statewide across Washington (2026)

Key Facts

Statute: RCW 19.27.031
Code Adopted: IFC Chapter 61, NFPA 58
Permit-Free Threshold: Generally 125 gallons or less
Enforcement: State Fire Marshal

Last verified: September 5, 2026Source: Washington State Legislature

Summary

Washington adopts the International Fire Code statewide under RCW 19.27.031, including NFPA 58 standards for liquefied petroleum gas (propane). These rules govern container placement, capacity, and installation regardless of city.

(b) The International Mechanical Code, published by the International Code Council, Inc., except that the standards for liquefied petroleum gas installations shall be NFPA 58 (Storage and Handling of Liquefied Petroleum Gases) and ANSI Z223.1/NFPA 54 (National Fuel Gas Code);

Source: Washington State LegislatureView official code

Full Breakdown

Under RCW 19.27.031 and WAC 51-54A, Washington adopts the International Fire Code (IFC) Chapter 61 and incorporates NFPA 58 (Liquefied Petroleum Gas Code). These rules set minimum distances from buildings, property lines, and ignition sources based on tank capacity, with permits required for tanks above specified thresholds. Residential aboveground tanks of 125 gallons or less are typically exempt from permits but must follow placement rules. The State Fire Marshal under RCW 19.27.110 has enforcement authority. Local jurisdictions cannot weaken these standards.

Violations & Penalties

Improper installation or storage may result in stop-use orders, civil penalties under the building and fire codes, and required removal or relocation of tanks.

Frequently Asked Questions

Do I need a permit for a residential propane tank?

Aboveground tanks of 125 gallons or less for residential use are typically permit-exempt but still must meet IFC placement requirements regarding distance from buildings and property lines.

Can my city require larger setbacks?

Yes, local jurisdictions may impose stricter standards but cannot weaken the IFC and NFPA 58 minimums adopted statewide under RCW 19.27.

Sources

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