Buying land in California: what to check

Terranown covers 58 of California's 58 counties. Find a parcel on the map.

California asks more of a land buyer than most states, but it also publishes more. Many hazards that are guesswork elsewhere are mapped here, and sellers must disclose several of them. The work is in reading them together.

Fire comes first in much of the state

CAL FIRE maps fire hazard severity zones, and a parcel in a high or very high zone faces stricter building standards, defensible-space clearing, and, increasingly, trouble finding insurance. Get an insurance quote before you are committed, not after.

Check for faults and other geologic hazards

Building for human occupancy across an active fault inside an Alquist-Priolo zone generally needs a geologic study first, and seismic hazard maps flag liquefaction and landslide areas. The natural hazard disclosure a seller provides will point to these; read it closely.

Understand the water before you rely on a well

California recognizes both riparian and appropriative surface water rights, administered by the State Water Resources Control Board. Groundwater is increasingly managed under the Sustainable Groundwater Management Act, and in critically overdrafted basins local agencies can limit pumping and new wells. Ask which basin the land is in and what its sustainability agency allows.

Look for Williamson Act contracts

Much farmland is under a Williamson Act contract, which lowers property taxes in return for keeping the land in agriculture. The contract runs with the land, and leaving it takes years or a substantial fee. It can rule out the use you have in mind.

The coast has its own permit layer

In the coastal zone, development needs a coastal development permit under the Coastal Act, through the county or the Coastal Commission. Bluff setbacks, habitat, and public access all come into it.

And the usual checks still apply

Read the flood zone, look for wetlands and streams, confirm legal access, and find out what the county’s on-site wastewater rules require of the soil. Rural parcels in the hills often have all of these questions at once.