Douglas County, Oregon requires a building permit for most construction, alteration and repair covered by the Oregon Building Code1. The Douglas County Building Department serves the county except the City of Reedsport, which uses its own contracted inspection agency2. Unincorporated land is zoned, and septic permits go through the county's On-Site Wastewater program34.
At a glance
- Building permit
- Required for work regulated by the Oregon Building Code; ordinary nonstructural repairs are exempt1
- Permit office
- Douglas County Building Department, except inside the City of Reedsport2
- Zoning
- County zoning applies to unincorporated land, subject to certain city-jurisdiction agreements5
- Septic
- Douglas County On-Site Wastewater handles applications and permit pricing6
- RV living
- Residential use is regulated at 30 days per year in urban areas and 90 days per year in rural or resource areas7
- Owner-builder
- A qualifying owner may build an intended residence with unpaid help from friends or relatives8
- Minimum lot size
- District-specific; examples include 2 acres in RR, 5 acres in 5R and 20 acres in AW9
- Tiny home
- No distinct tiny-home occupancy rule was confirmed; ask Planning and Building how the proposed unit is classified1011
Who to call
Building permits
Douglas County Building Department
Construction permits, plan review, inspections and electrical permit questions outside the City of Reedsport
1036 S.E. Douglas Avenue, Roseburg, OR 97470
Planning & zoning
Douglas County Planning Department
Zoning, land-use worksheets and floodplain questions for unincorporated Douglas County
1036 SE Douglas Avenue, Justice Building, Room JB106, Roseburg, OR 97470
Septic permits
Douglas County On-Site Wastewater Program
On-site wastewater applications, septic permits and permit prices
1036 SE Douglas Avenue, Room 106, Justice Building, Roseburg, OR 97470
Contact details are copied from each office’s official page and were checked against it on September 28, 2026.
Do you need a building permit in Douglas County, Oregon?
Yes. In Douglas County Building Department territory, a permit must be issued before construction, alteration or repair of work regulated by the Oregon Building Code; ordinary nonstructural repairs are the main general exception112. The county program serves every jurisdiction in Douglas County except the City of Reedsport, which has an independently contracted inspection agency2.
Some limited residential work is exempt. Examples include fences no taller than 7 feet, qualifying detached nonhabitable accessory structures no larger than 200 square feet and 10 feet high, certain patio covers under 200 square feet, and qualifying uncovered decks under 30 inches above grade12. Those exemptions do not allow encroachment over a septic disposal system or into required yards, and electrical work can still require its own permit12. Qualifying agricultural buildings can receive a structural-code exemption, but the definition and exclusions still matter and zoning may still apply13.
Who issues Douglas County building permits, and how do you reach the office?
The Douglas County Building Department issues construction permits and handles plan review and inspections outside the City of Reedsport; call 541-440-4559 or visit 1036 S.E. Douglas Avenue, Roseburg, OR 97470112. Reedsport property owners should use the city's independently contracted inspection agency instead2.
A construction-permit submittal starts with an approved Planning Department worksheet, followed by the application and required plans at the Building Department counter14. Residential submittals require 2 plan sets when plans are required, while commercial submittals require 314. The county describes an initial building review of 10 working days, but revisions or another agency's approval can lengthen the process12. Permit fees vary by the work; county fees include a 12% state surcharge, so obtain a project-specific quote rather than estimating from a single example15.
Does Douglas County have zoning?
Yes. Douglas County zoning classifications cover unincorporated land and set allowed uses and development standards by the boundaries on county zoning maps35. An agreement can transfer planning jurisdiction to a city for certain unincorporated land within that city's Urban Growth Boundary, so verify the governing office before relying on a county zone label16.
Lot size, setbacks, coverage and height depend on the district. The minimum is 2 acres in Rural Residential, 5 acres in Rural Residential-5 and 20 acres in Agriculture and Woodlot, with a possible ordinance-based waiver in the Agriculture and Woodlot district9. In Rural Residential, most structures must be at least 30 feet from a public road or qualifying easement and 10 feet from another property line17. The Rural Residential-5 district limits building coverage to 40% and structure height to 45 feet1819. Call Planning at 541-440-4289 for the parcel-specific zoning and worksheet10.
How do septic permits work in Douglas County?
Douglas County On-Site Wastewater handles residential and small-business onsite wastewater permitting as Oregon DEQ's local agent46. Call 541-440-6183 or email [email protected] for applications and permit prices20. A septic permit is required to install a new system or alter or repair an existing system, and the construction-installation permit issued after an approved site evaluation is valid for 1 year21.
Only about 3.9% of Douglas County soils rate as free of severe limitations for a conventional drain field, so a favorable site evaluation should be a purchase contingency rather than an assumption22. A composting toilet does not answer the entire wastewater question: Oregon still requires an approved method for graywater, and DEQ may approve a drain field at as little as two-thirds of standard capacity23. A building inside a sewer district must connect to the sewer even if it uses a composting toilet24.
Can you live in an RV or tiny home on your land in Douglas County?
Douglas County regulates residential RV occupancy once it reaches 30 days in a calendar year in an urban or urban-unincorporated area, or 90 days in a rural or resource area; at that point the RV is subject to mobile-home permitting7. Oregon also authorizes counties to allow one residential-use RV rental on a rural parcel with an existing primary dwelling, but the county must elect to allow it and may impose conditions25. After a natural disaster makes a dwelling uninhabitable, qualifying RV occupancy may continue for up to 5 years7.
For a tiny home, ask Planning how the parcel's zone treats the proposed dwelling and ask Building which construction classification and permits apply1011. We could not confirm a distinct Douglas County tiny-home occupancy rule or a county minimum dwelling floor area. Manufactured structures are allowed on private Oregon land with the landowner's consent, but that statewide rule does not displace local placement, zoning, building or wastewater requirements26.
Building a home in Douglas County: the steps, in order
- Ask Douglas County Planning to confirm jurisdiction, zoning, setbacks and lot standards for the tax lot105.
- Obtain the approved Planning Department worksheet required with the construction-permit application14.
- Have Douglas County On-Site Wastewater evaluate and permit the septic proposal if public sewer is unavailable421.
- Submit the construction application and 2 residential plan sets when plans are required14.
- Resolve water: a landowner using drilling machinery must obtain a permit, a $10,000 bond or letter of credit, and pay a $550 fee before well work unless a licensed and bonded constructor performs it27.
- Keep permitted work exposed for inspection; requests made before 4 p.m. on the prior working day generally receive next-day service, subject to limited exceptions28.
- Obtain the required certificate of occupancy before using or occupying the completed dwelling29.
What should you check before buying land in Douglas County?
Start with buildability, not the listing description. Only about 27.4% of Douglas County land has a slope of 15% or less, while only about 3.9% of soils avoid severe conventional drain-field limits3022. Make zoning confirmation, legal access, a septic site evaluation and a realistic grading plan early contingencies. Douglas County Planning administers floodplain rules for Special Flood Hazard Areas on unincorporated property, so ask that office whether the proposed building area is affected10.
Water deserves separate due diligence because a permit is generally required to use groundwater from a well, subject to Oregon exceptions and restrictions31. The county averages 53.1 inches of annual precipitation, but severe drought occurred in about 24.8% of measured years3233. Douglas County is about 87.4% wooded and 54.7% federally owned, which makes exact boundaries, recorded access and wildfire planning especially practical checks3435. The median property-tax bill is about $1,869 per year, with an effective rate near 0.7%3637.
Watch-outs
- The City of Reedsport uses its own contracted building-inspection agency rather than the Douglas County Building Department2.
- County planning jurisdiction can shift to a city for certain unincorporated parcels inside an Urban Growth Boundary, so confirm the responsible office for the exact tax lot16.
- A temporary manufactured dwelling approved for a qualifying family hardship has an initial authorization of up to 2 years and generally must be removed, demolished or converted within 90 days after authorization expires38.
- We could not confirm countywide rules for minimum dwelling size or a distinct tiny-home category; ask Douglas County Planning and Building before ordering a unit or preparing a site1011.
Sources
- Permits / Fees (2026 county census)
- Building, quoted and re-checked
- Douglas County Land Use and Development Ordinance (2026 county census)
- On-Site Wastewater (Septic) (2026 county census)
- Douglas County Land Use and Development Ordinance, quoted and re-checked
- On-Site Wastewater (Septic), quoted and re-checked
- Full Land Use Development Ordinance 2026, quoted and re-checked
- Oregon Revised Statutes, ORS 455.320 and related provisions, quoted and re-checked
- Land Use Development Ordinance, PDF, quoted and re-checked
- Douglas County Planning Department (douglascountyor.gov)
- Douglas County Building Department (douglascountyor.gov)
- Permits / Fees, quoted and re-checked
- Land Use Development Ordinance, PDF, quoted and re-checked
- How to Apply, quoted and re-checked
- Permits / Fees, quoted and re-checked
- Douglas County Land Use and Development Ordinance, quoted and re-checked
- Land Use Development Ordinance, PDF, quoted and re-checked
- Land Use Development Ordinance, PDF, quoted and re-checked
- Land Use Development Ordinance, PDF, quoted and re-checked
- Douglas County On-Site Wastewater Program (douglascountyor.gov)
- Residential Septic Permitting, quoted and re-checked
- Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
- What do I do with the finished material? (Oregon statewide rule), quoted and re-checked
- What do I do with the finished material? (Oregon statewide rule), quoted and re-checked
- Oregon Revised Statutes, ORS 215.490 (Oregon statewide rule), quoted and re-checked
- Oregon Revised Statutes, ORS 446.125 (Oregon statewide rule), quoted and re-checked
- Landowner Constructed Wells, quoted and re-checked
- 2023 Oregon Residential Specialty Code — Chapter 1, quoted and re-checked
- 2023 Oregon Residential Specialty Code — Certificate of Occupancy, quoted and re-checked
- Share of land at 15% slope or less: Bolthole Index county data
- Apply for a Water Use Permit, quoted and re-checked
- Annual precipitation: Bolthole Index county data
- Share of years in severe drought: Bolthole Index county data
- Wooded share of land: Bolthole Index county data
- Federal land share: Bolthole Index county data
- Median property tax bill: Bolthole Index county data
- Effective property tax rate: Bolthole Index county data
- Full Land Use Development Ordinance 2026, quoted and re-checked
Written September 28, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.