Rolling Southwest Washington hill pasture with fir woodlots and replanted forest, a flat-topped snowy volcano far on the horizon.
Clark County, Washington Vancouver & Southwest Washington

Barndominium Builders in Clark County, Washington

Rural Clark County is where most barndominium projects in Southwest Washington actually land. North and east of Vancouver, Washington, the unincorporated county still has five-, ten- and twenty-acre parcels with room for a house, a covered equipment bay and a pasture, and the county's rural zones expect people to farm or keep timber alongside their homes. That makes it a natural fit for a pole barn home or a steel-framed building with living quarters at one end and a shop at the other. The trade-off is that you supply your own services: a rural parcel usually means a private well, a water adequacy review by Clark County Public Health, and a septic system designed for the soils on that lot. Clark County Community Development issues the building permit for unincorporated land, while Vancouver and the other cities handle parcels inside their own limits. We build turnkey homes here, supply barndominium kits for owners who want to raise the shell themselves, and draw custom plans that place the house, shop and drainfield on the parcel before anything is priced. If you have a parcel in mind, send it through the survey and we will look at the zone, the water and the septic path first.

Clark County at a glance

County
Clark County
Building permit
County building department
Land use
County rural and resource zoning
Wastewater
Septic permit from the health jurisdiction
Water
Private well
Tell us about your land

Barndominium Builders Near Clark County

From a turnkey build to a shell you finish yourself, the work starts with the parcel: the access, the building pad, the route to sewer or septic, and the water source. The parcel decides the budget more than the floor area does, so each option is priced against your land rather than a rate card.

Turnkey Builds

Turnkey barndominiums in Washington State: one team from land and permits to the finished, inspected house, with water, septic and energy code planned in.

Custom Plans

Custom barndominium plans for Washington State: floor plans and permit drawings with the energy code credits and your site's design values built in.

Site Preparation

Barndominium site preparation in Washington State: clearing, grading, drainage and pads, planned around the well, septic area, wetlands and the climate.

Permitting

Barndominium permits in Washington State: city or county building permit, water supply evidence, septic permit, energy code credits and rural zoning.

Barndominium Kits and Pole Barn Homes in Clark County

A kit suits an owner who wants to raise the shell with their own crew. A pole barn home sets its frame on posts and trusses (the engineering term is post-frame construction) and suits a wide, simple layout with a shop bay under the same roof; a metal building home uses a bolted steel frame. Which one fits your parcel comes down to the zoning, the site and the design values the local building office publishes, covered below.

Barndominium Kits

Barndominium kits and shell kits for Washington State land: frame, panels and drawings, sized to the design values your city or county sets for the site.

Pole Barn Homes

Pole barn homes and pole barn house kits for Washington State: post-frame buildings with a shop and living space, designed to your county's snow load.

Metal Homes

Metal building homes in Washington State: steel-clad houses finished to the state energy code, with the insulation and condensation details done right.

Building a Barndominium in Clark County: Permits, Zoning, Septic and Water

On rural land the zoning, septic and water answers often come before the building answer. Here is who decides each part in Clark County, taken from the office or document that publishes it. Rules change, so check them again against your parcel before anything is drawn.

Who issues the building permit County building department

Clark County Community Development, Building Safety

The county's Building Safety program reviews and inspects permitted construction in unincorporated Clark County and the town of Yacolt; the cities, including Vancouver, permit inside their own limits. A new house is a New Home Construction (NHC) permit, which bundles the plumbing, heating and cooling, water or sewer connection and road approach permits. The county does not issue electrical permits.

Source: Building, Clark County Community Development (clark.wa.gov)

Who decides the land use Rural and resource zones

Clark County Community Development, Title 40 Unified Development Code

Under the Growth Management Act, each county's comprehensive plan sets rural densities; the county zoning code sets the actual minimum lot size. Clark County's rural districts set it at 20 acres in Rural 20, 10 in Rural 10 and 5 in Rural 5, unless the health department requires more. Single-family homes with accessory buildings, including one guest house, are allowed in all three, and farming and forestry are encouraged.

Source: Section 40.210.020 Rural Districts (R-20, R-10, R-5), Clark County Code (codepublishing.com)

Sewer or septic Septic: local health jurisdiction

Clark County Public Health, On-site Septic Program

Clark County Public Health permits septic systems on land off the sewer, after a soil and site evaluation and a design that keeps a reserve area for a future drainfield. It says about 35,000 homes and businesses in the county use septic, checks that the soils and topography can support each system, and tracks routine maintenance inspections afterward.

Source: On-site Septic Systems, Clark County Public Health (clark.wa.gov)

Where the water comes from Private well

Clark County Public Health, Drinking Water and Wells

Individual wells serve about 24% of county residents. For water availability, Community Development often requires a water adequacy and verification evaluation (WAVE) from Clark County Public Health before issuing a building permit, and every new or replacement well must be tested for coliform bacteria, arsenic and nitrate by a state-certified lab.

Source: Individual Water Systems, Clark County Public Health (clark.wa.gov)

County design values
Clark County's residential structural design sheet (revised January 29, 2021) lists a 12-inch frost depth, a 30 psf ground snow load with a 25 psf minimum roof snow load, 135 mph ultimate wind speed at exposure B, 1,500 psf soil bearing, and Seismic Design Category D for residential design. Battle Ground and Camas use colder winter design temperatures.

Source: Residential Structural Design Information, Clark County Community Development (clark.wa.gov)

Farm buildings versus shops
The county lets a true agricultural structure, one used solely to house farm or forestry equipment, hay, grain or livestock and never lived in, skip the building permit once the owner certifies its use. Shops, garages and residential accessory buildings do not qualify, so a barn with living space is permitted like any other home.

Source: Agricultural Structure Permit Exemption, Clark County (clark.wa.gov)

Building on land near Clark County

Pull the parcel up in the county's Property Information Center first: its environmental tab shows any recorded well or septic system. Then confirm the zone, since a 5, 10 or 20 acre minimum or resource zoning decides what the parcel can hold. Budget time for the water adequacy review and the soil and site evaluation before the permit, because the drainfield location often decides where the house and shop can sit. Sloped and wooded ground in the north county needs more clearing, grading and driveway work than flat pasture, which our site preparation service handles. If the acreage is enrolled in a current-use program, talk to the county assessor before building: converting classified land to another use triggers back taxes, interest and a 20 percent penalty.

Other places in this part of Washington

Vancouver & Southwest Washington

See every service

Have land in or near Clark County? Tell us about the parcel and what you want on it, and we will check it against the local rules before anything is drawn.

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Building in Clark County: questions

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How much does it cost to build a barndominium in Clark County?
On rural land, the site work is often the swing factor: drilling and testing a well, the septic system the soils allow, the length of the driveway and power run, and any clearing on wooded ground. The building itself depends on size, frame and finish. We price against the actual parcel once those are known. Our barndominium cost guide gathers published building-cost ranges so you can set a budget before the site numbers come in.
Do I need a building permit for a barndominium in Clark County?
Yes. Any building you live in is permitted as a house, so on unincorporated land Clark County Community Development issues a New Home Construction permit, usually after Clark County Public Health has signed off on water and septic. Only a barn used solely for farm purposes and never occupied can skip the building permit. Inside a city, that city's building department issues it. Our permitting service assembles the application.
Does a barn on Clark County farmland need a building permit?
A barn used only for farm or forestry purposes, and never occupied, can skip the building permit once the owner certifies that use, though setbacks and environmental rules still apply. The county expressly leaves shops, garages and residential accessory buildings out of that exception. A barndominium, with living quarters and a shop bay under one roof, is permitted as a home; our pole barn homes and custom plans are drawn for that path.
What does the county need before it will approve water and septic?
For a private well, Clark County Public Health runs a water adequacy and verification evaluation and requires the new well to pass tests for coliform, arsenic and nitrate. For septic, the permit application carries a soil and site evaluation and a designer's stamped design. The county notes that the water review is often required before the building permit is issued.

Keep reading

What usually comes next once you know what Clark County allows.

Barndominium Cost Guide

Sourced per-square-foot ranges by tier and size, and what moves the number on your land.

Read it

Is a Barndominium Legal in Washington?

Zoning, rural land, septic, water and who inspects, before you buy the land.

Read it

How Long Does It Take?

From parcel to move-in, and which steps set the clock.

Read it

Sources for this page

The published pages behind the Clark County facts above. Rules change, so check the current version with the office before you rely on it.

Other places near Clark County

Nearby places with their own pages. Across a city limit or a county line the permit office, the zoning, the septic program and the water rules can change, so each is covered separately.

Vancouver

Clark County, Washington

Cowlitz County

Washington county

Longview

Cowlitz County, Washington

Building in Clark County?

Start with the survey. Tell us where the land is and what you want on it, and we will come back with which offices decide it, what the zoning allows, and a plan to fit.

Start the survey