Garfield County, WA zoning map, flood zone and property lines by address
Free, no account. Or open the Washington map and tap a lot.
Towns in Garfield County: Pomeroy.
Property lines
The parcel outline, parcel number and mapped size come from the Washington Technology Solutions (WaTech), statewide parcels from the counties, so a Garfield lot shows the same lines the county assessor draws. Garfield County covers about 454,935 acres of land and 4,768 acres of water.
Mapped lines are approximate. The Garfield County assessor keeps the parcel record (Garfield County website); a licensed surveyor sets the true corners.
Zoning
Garfield County zones its unincorporated land, and Pomeroy zones the land inside its limits. ParcelSheet shows the use the county assessor lists for the lot and links the county planning department for the district, the uses it allows and the lot size it needs.
ADU and guest houses
Under Washington's Planning Enabling Act and Growth Management Act (Revised Code of Washington Chapters 36.70 and 36.70A), local governments can allow an accessory dwelling unit on a lot with a house. Whether a Garfield lot can add one depends on its district; the county planning department has the rule. ParcelSheet shows the mapped lot size and the ground's slope, the first two things the question turns on.
Septic and soil
ParcelSheet reads the USDA soil survey at the lot: the soil's name, its septic absorption rating and whether it is prime farmland. Garfield County is soil survey area WA623, Garfield County Area, Washington, last updated September 2026, on Web Soil Survey.
A new or changed septic system in Garfield County needs a permit from the Garfield County health department (local health jurisdiction, under Washington State Department of Health on site sewage rules).
Setbacks
Setbacks in Garfield County come from the zoning district: the front, side and rear distances a house must keep. ParcelSheet does not draw setback lines; the county zoning office gives them for the lot's district, and Pomeroy for land inside its limits.
Hazards that apply
- Wetlands and wildfire. ParcelSheet shows the National Wetlands Inventory near a Garfield lot and the Forest Service wildfire hazard rating at it.
Questions
How do I find property lines in Garfield County?
Open the Washington map, type the address, and the parcel outline from the Garfield County assessor shows on the map with its parcel number and mapped size. Mapped lines are approximate; only a licensed surveyor sets the true corners.
What is my property zoned in Garfield County?
Zoning in Garfield County is set by the county for unincorporated land and by each city (such as Pomeroy) inside its own limits. ParcelSheet shows the use code the county assessor lists and links the office that sets the zoning; the planning office has the final word.
Can I build an ADU in Garfield County?
Under Washington's Planning Enabling Act and Growth Management Act (Revised Code of Washington Chapters 36.70 and 36.70A), counties and cities can allow an accessory dwelling unit, and each sets its own rules. In Garfield County ask the zoning office for the lot's district first; ParcelSheet shows the lot size as mapped so you can see the room you have.
Do I need a septic permit in Garfield County?
Yes. A new or changed septic system in Garfield County needs a permit from the Garfield County health department (local health jurisdiction, under Washington State Department of Health on site sewage rules). ParcelSheet shows the USDA soil survey's septic rating at the lot, from survey area WA623 (Garfield County Area, Washington).
What can I build on 5 acres in Garfield County?
Zoning in Garfield County is set by the county for unincorporated land and each city inside its own limits (such as Pomeroy). The zoning district decides the uses, how many homes and the smallest lot it allows on 5 acres. ParcelSheet shows the lot size as mapped and the use code on the parcel record; the planning office has the district and its rules. See the Garfield County website.
What are the residential setbacks in Garfield County (2026)?
Setbacks in Garfield County come from the zoning code of the county, or of the city when the lot is inside city limits: the front, side and rear distances depend on the lot's district. ParcelSheet does not draw setback lines or give a number it did not read; the zoning office gives them for the district. See the Garfield County website.
Next to Garfield County: Asotin County, Columbia County, Whitman County.
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