Clark County, WA zoning map, flood zone and property lines by address
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Towns in Clark County: Vancouver, Camas, Salmon Creek.
Flood zone by address
ParcelSheet reads FEMA's National Flood Hazard Layer at the lot: the zone, whether it is a high risk area where lenders ask for flood insurance, and the base flood elevation where FEMA lists one. FEMA's countywide study for Clark County has 162 FIRM panels, the newest effective November 2023; no coastal V zones are mapped in it.
The official panel and any Letter of Map Amendment are at FEMA's Map Service Center. An elevation certificate for a Clark house comes from a licensed surveyor and is often on file with the county or city building office.
Property lines
The parcel outline, parcel number and mapped size come from the Washington Technology Solutions (WaTech), statewide parcels from the counties, so a Clark lot shows the same lines the county assessor draws. Clark County covers about 402,246 acres of land and 17,337 acres of water.
Mapped lines are approximate. The Clark County assessor keeps the parcel record (Clark County website); a licensed surveyor sets the true corners.
Zoning
Clark County zones its unincorporated land, and Vancouver, Camas each zone the land inside their 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 Clark 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. Clark County is soil survey area WA011, Clark County, Washington, last updated September 2026, on Web Soil Survey.
A new or changed septic system in Clark County needs a permit from the Clark County health department (local health jurisdiction, under Washington State Department of Health on site sewage rules).
Setbacks
Setbacks in Clark 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 Vancouver and Camas for land inside their limits.
Hazards that apply
- Wetlands and wildfire. ParcelSheet shows the National Wetlands Inventory near a Clark lot and the Forest Service wildfire hazard rating at it.
Questions
Is my house in a flood zone in Clark County?
Type the address in the box above and ParcelSheet reads FEMA's flood zone at the lot's center. FEMA's countywide flood map for Clark County has 162 panels, the newest effective November 2023. A lender or insurer uses the official FIRM panel; FEMA's Map Service Center has it.
How do I find property lines in Clark County?
Open the Washington map, type the address, and the parcel outline from the Clark 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 Clark County?
Zoning in Clark County is set by the county for unincorporated land and by each city (such as Vancouver, Camas) 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 Clark 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 Clark 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 Clark County?
Yes. A new or changed septic system in Clark County needs a permit from the Clark 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 WA011 (Clark County, Washington).
What can I build on 5 acres in Clark County?
Zoning in Clark County is set by the county for unincorporated land and each city inside its own limits (such as Vancouver, Camas). 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 Clark County website.
What are the residential setbacks in Clark County (2026)?
Setbacks in Clark 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 Clark County website.
Next to Clark County: Cowlitz County, Skamania County.
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