Buying Land in Oregon: Statewide Planning, EFU Zoning, and Septic Permits

Oregon has a mandatory statewide land-use planning system

Most states leave land-use planning almost entirely to counties and cities. Oregon does not. Since the 1970s, the state has required every city and county to adopt a comprehensive plan and zoning code that complies with a set of statewide planning goals adopted by the Land Conservation and Development Commission (LCDC) and administered by the Department of Land Conservation and Development (DLCD). There are 19 statewide goals in total, covering everything from agricultural and forest land conservation to urbanization and natural hazards, and they are legally binding on local governments, not just advisory.

For a land buyer, the practical effect is that local zoning in Oregon isn't purely a local decision the way it is in most states -- a county can't simply rezone farmland for rural subdivisions or expand a small town's buildable area without that change fitting within the statewide framework, and DLCD can and does get involved when it doesn't. This is the single biggest thing that makes Oregon different from most of the country for a land buyer, and it's worth understanding before you fall in love with a specific parcel.

Exclusive Farm Use (EFU) zoning: the big constraint on rural land

Statewide Planning Goal 3 (Agricultural Lands) requires counties to inventory agricultural land and protect it through Exclusive Farm Use (EFU) zoning. A very large share of Oregon's rural, unincorporated land -- especially in the Willamette Valley and other productive farming regions -- is zoned EFU under this goal, and EFU zoning is genuinely restrictive: it is designed to keep farmland in farm use, not to provide rural home sites.

Farm dwellings, farm-related structures, and agricultural operations are generally allowed outright on EFU land. A non-farm dwelling -- i.e., a house for someone who isn't operating the farm -- is a different matter: it typically requires a conditional use permit from the county, and the county has to make specific findings before it can approve one (commonly some version of a finding that the specific parcel isn't suitable for the farm use it's zoned for). The exact tests, minimum parcel sizes, and whether a particular EFU-zoned parcel could ever support a dwelling vary by county and by soil/land classification -- this is not a question you can answer from a zoning map alone.

• If a parcel is zoned EFU, do not assume you can build a house on it -- confirm dwelling eligibility with the county planning department before you make an offer.
• Ask specifically whether the parcel already has an approved dwelling, a documented dwelling right, or would need a new conditional use approval.
• A realtor or seller describing EFU land as "buildable" is describing a possibility, not a guarantee -- verify it yourself with the county.

Forest zoning and urban growth boundaries also shape what you can do

Statewide Goal 4 does the same thing for forestland that Goal 3 does for farmland: it requires counties to zone and conserve forest lands, with its own set of restrictions on dwellings and land divisions. And Statewide Goal 14 (Urbanization) requires every Oregon city to have a state-recognized urban growth boundary (UGB) -- land outside a UGB is meant to stay rural or resource land, so a parcel just outside a city's edge is not necessarily on a path to residential development the way it might be in a state without UGBs.

The upshot for a buyer: in Oregon, a parcel's zoning designation is doing more legal work than it does in many other states, because that designation was assigned to comply with a specific statewide goal, not just local preference -- and it's correspondingly harder to get a rezone approved.

Septic and on-site wastewater permitting runs through DEQ

If a parcel isn't on a public sewer system, it needs an on-site septic system, and in Oregon that system is permitted under the state's Onsite Wastewater Treatment Program, administered by the Department of Environmental Quality (DEQ) under state administrative rules (OAR chapter 340, division 71).

DEQ permits septic systems directly, out of its Medford office, in Curry, Jackson, and Josephine counties. In the other 33 counties, DEQ has entered into agreements authorizing the county to act as DEQ's agent -- meaning the county receives applications, issues permits, and does inspections, but is doing so under state standards and state authorization, not an independent county program. Either way, a site evaluation and permit are required before a septic system can be installed, and that's a separate step from -- and doesn't replace -- the county land-use and building permit process. See our national guides to perc tests and septic systems for how that process works in general.

What's still decided at the county level

The statewide framework sets the rules of the game, but a lot of the actual, on-the-ground decisions are still made by the county: the specific zoning map and permitted-use list for a given parcel, whether a non-farm dwelling application gets approved, minimum lot sizes and setbacks, building permits, road access standards, and -- in the 33 counties acting as DEQ's septic agent -- who you actually call to schedule a site evaluation. Two EFU-zoned parcels in different counties can have meaningfully different odds of ever getting a dwelling approved, even though both are subject to the same statewide Goal 3.

That means the state-level picture on this page tells you what kind of system you're dealing with and what questions to ask -- it doesn't tell you whether a specific parcel can be built on. That answer comes from the county planning department, every time.