Possible, but earthquakes will be hard. The U.S. Geological Survey maps strong earthquake shaking here, so build to the seismic code. Water is easy here, with about 116 inches of rain a year and wells near 10 feet. The ground is steep, with slopes averaging about 20%. That raises the cost of a driveway, septic, and foundation.
What the land says
Rain
Rain can supply much of a household's water with a large tank. A garden mostly waters itself in normal years.
About 116 inches a year (PRISM, 1991 to 2020 average)
Wells
Shallow wells, so drilling should be one of the cheaper costs.
The typical well here is about 10 feet deep; a well typically runs $3,000 to $7,000
Growing season
A full season for most vegetables.
About 208 frost-free days, USDA zone 9a; last frost about April 20, first about October 29
Sun
Weak sun. Solar needs a generator behind it in winter.
About 3.6 hours of full sun a day, averaged over the year
Flood
Flood zones run along creeks and rivers here. Look up the parcel on FEMA's flood map.
FEMA maps flood zones within a quarter mile in places
Wildfire
Low wildfire risk.
U.S. Forest Service wildfire hazard map: Very Low to Low here
Storms
Hurricanes and strong tornadoes are rare here.
NOAA: no hurricane-strength storm within 50 miles since 1975; about 0.3 strong (EF2 or stronger) tornadoes a decade within 25 miles
Earthquakes
Strong shaking is possible. Build to the seismic code and brace the water tank.
USGS seismic hazard map: very high
Terrain
Steep in places. Driveways, septic, and foundations cost more.
Slopes average about 20%, about 620 feet above sea level
Soil
Good ground for a standard septic system. The county's soil test decides.
Silt loam, well drained (USDA soil survey). A standard system typically runs $5,000 to $10,000
Road
Paved roads are close by.
Nearest paved road usually within about 0.7 miles (OpenStreetMap)
Check an Oregon parcel, or plan the one you own
Get a free 0-100 off-grid score.
A step-by-step build plan, sizing your solar, water, garden, septic, heat, and buildings.
Is it legal here?
Zoning
We found no public zoning map for Clatsop County, so call the county planning office with the parcel number to ask whether the land is zoned.
Building code
Oregon's building code applies uniformly statewide, including the Oregon Residential Specialty Code for houses (based on the International Residential Code), and cities and counties cannot set different requirements without state approval. City or county building departments issue house permits and inspect, and the state Building Codes Division does it for some counties.
Rainwater
Collecting it is allowed.
Composting toilets
Allowed.
Water rights
Water belongs to whoever claimed it first. A new well or pond may need a state permit, and a creek may already be claimed.
Drilled to about 10 feet, with pump and pressure tank
Septic
$5,000 to $10,000
Standard system
Solar and batteries
$19,000 to $36,000
Sized for a modest household
Road or driveway
$4,000 to $10,000
From the nearest road to a house site
Clearing
$1,000 to $5,000
A house site, solar, and garden
Total
$32,000 to $68,000
Before the house
Before you make an offer on land here
Flood map
Look up the parcel on FEMA's flood map.
Flood zones run along creeks and rivers here. Building in one means flood insurance and extra permits.
Zoning
Call the county planning office with the parcel number.
There is no public zoning map, so we cannot tell whether the land is zoned.
Soil test
Get a soil test before you count on septic.
The county has to approve the ground before it issues a septic permit.
Nearby counties
41,102 people live in Clatsop County, about 49.6 per square mile. It ranks tied for 7th of the 36 Oregon counties we scored, and Oregon ranks 46th of 50 states.