Douglas County, OR ADU (accessory dwelling unit) Rules (2026): City or County?

These notes cover Douglas County, Oregon: Roseburg, the Umpqua Valley, and the coast at Reedsport. Douglas County, Washington (East Wenatchee) has its own rules.

Oregon’s statewide ADU allowance is summarized in the Oregon ADU rules guide. Cities adopt their own standards on top of it. Unincorporated county land, especially outside an urban growth boundary, can be a different program or no ADU program at all. If your parcel is in the county but has a Roseburg mailing address, you file with the county, not Roseburg city hall.

The drive from Battle Ground is a real line item in the budget. It’s a long haul south on I-5, valley heat affects the schedule, and the delivery has to be planned well ahead.

What to confirm before you pick a model

• City of Roseburg, City of Reedsport, another city, or Douglas County.
• Whether the zone allows a second dwelling, and the size and placement limits that office is using now.
• Sewer or septic, water, and wildfire or hillside notes. Rural lots often stall on wastewater.
• Truck access and a staging area. At this distance, a set that can’t go ahead is expensive.
• System development charges and any deed restriction the city attaches to an ADU approval.

City notes we keep:

• Roseburg
• Reedsport

What Wolf does

We confirm the reviewing office and whether a factory-built home from Battle Ground can be permitted and delivered. When the lot qualifies, our Oregon turn-key service covers evaluation, permitting support, site work, delivery, and setup, so even with the long I-5 haul you’re working with one team instead of coordinating several contractors. For Reedsport and Winchester Bay, see Oregon coast ADUs and beach cottages for coastal flood and delivery planning.

Request a free property evaluation.

General planning notes. Confirm current city or county code before you rely on a statewide summary.