Fire Truck Access Requirements for Residential Property

The driveway is the part of a build most people treat as an afterthought. The fire district can review it when the permit application goes in, and access rules generally apply to new homes on city lots as well as rural acreage, depending on what your city or county has adopted.

The 150-foot rule

In Oregon, a fire truck access road generally has to reach within 150 feet of every part of a new home’s first story exterior walls, measured along an approved path around the house (Oregon fire code applications guide, posted by Yamhill County), and the model fire code calls for 20 feet of width. Some Oregon fire districts accept a 12 foot driving surface for one or two homes, with 20 feet kept clear (Oregon fire code applications guide). Washington leaves these standards to each city and county (WAC 51-54A-0503).

The code basis differs by state. Oregon uses the 2025 Oregon Fire Code, which is based on the 2024 International Fire Code (OAR 837-040-0010). Washington’s state fire code is based on the 2021 International Fire Code (WAC 51-54A-003). Either way, the fire district or fire marshal that serves the lot applies the rule.

That 150 feet is the model fire code, which Oregon adopts. Washington cities and counties set their own numbers, so the distance there can differ. The fire code official can extend it in some cases, such as a home with fire sprinklers, a site where terrain rules out a road, or a lot with no more than two homes (Oregon fire code applications guide).

What the road itself has to do

The numbers below are the model code’s starting points, plus the local practice that several Oregon fire districts publish. Your fire district sets the final numbers for your lot.

• Width: 20 feet under the model code. Some Oregon fire districts allow a narrower driving surface, often 12 feet, for a driveway serving one or two homes, but some still require 20 feet of clear width around it (Gresham Fire guide).
• Vertical clearance: 13 feet 6 inches under the model code (some cities require more, such as 14 feet in Seattle) (Seattle Fire Code, Chapter 5). Trim trees and keep structures out of that space.
• Surface: an all weather surface built to carry a fire engine. Where a jurisdiction adopts the fire code’s Appendix D, that means up to 75,000 pounds, and some Oregon fire districts also set a 12,500 pound wheel load (Gresham Fire guide). Expect to document the design.
• Grade: the model fire code starts at 10 percent (Oregon fire code applications guide). Some Oregon fire districts allow up to 12 percent on a paved surface and up to 15 percent on a paved surface with fire sprinklers, and some will not approve anything steeper (Gresham Fire guide). Washington cities and counties set their own limits.
• Turnaround: under the model fire code, a dead end access road longer than 150 feet needs an approved turnaround, such as a hammerhead or cul de sac (Seattle Fire Code, Chapter 5). Your fire district sets the shape and size.
• Turnouts: some Oregon fire districts require a 10 by 30 foot turnout at least every 400 feet on a long, narrow driveway (Oregon fire code applications guide). This is local practice, not a statewide rule.

If a compliant road can’t be built, the fire code allows an approved alternative. In Oregon, the building official can accept options set by state rule, such as an NFPA 13D home sprinkler system or added fire resistive construction (OAR 918-480-0125). One Oregon fire code guide says a deed notice that access does not conform may be required (Oregon fire code applications guide). In Washington, the options are set locally, so ask the city or county.

Fire flow, when it applies

The fire code expects an approved water supply for new homes (Oregon fire code applications guide). Where there are hydrants, the model code sets a minimum fire flow. Where there are none, the fire official can reduce the requirement (Seattle Fire Code, Appendix B, model text) or accept an alternative, such as a tank (Oregon fire code applications guide).

Where a jurisdiction uses the fire code’s Appendix B, a home up to 3,600 square feet typically needs 1,000 gallons per minute for one hour at 20 pounds per square inch of water pressure, or 500 gallons per minute for 30 minutes if it has an NFPA 13D sprinkler system (Oregon fire code applications guide). Larger homes need more. Oregon adopts Appendix B statewide (Oregon State Fire Marshal, 2025 Oregon Fire Code summary). In Washington, ask the city or county that serves the lot whether it applies. Confirm the current figures with the fire district.

Where there’s no hydrant system, the fire code lets the fire official use NFPA 1142, the national standard for rural water supply, which can include an on site tank or a draft source (Oregon fire code applications guide).

Before you design the driveway, find out which fire district serves the lot and what its limits are for width, grade, and turnaround. Then measure whether any part of the house sits more than 150 feet from the road, the model code distance, measured around the house. The goal is a driveway the fire district approves at plan review.