Unincorporated Josephine County, Oregon requires residential building permits through County Building Safety and zoning review through County Planning12. County Planning manages rural-zoned land, including some parcels inside the Grants Pass Urban Growth Boundary; urban-zoned parcels there follow Grants Pass rules3. Oregon DEQ's Medford office handles residential septic permits in Josephine County4.
At a glance
- Building permit
- Required for residential construction in unincorporated Josephine County1
- Zoning
- Yes—Planning reviews County Code Title 19 compliance5
- Septic permit
- Oregon DEQ's Medford office handles new systems, alterations and repairs46
- RV camping
- Temporary only on private property, with zone-based time limits and sanitation rules7
- Tiny home
- Tiny homes on wheels are allowed in approved transitional housing camps8
- Owner-builder
- A narrow structural-code exemption exists, but a building permit is still required9
- Minimum home size
- Cluster-lot siting goal, not a general minimum dwelling floor area10
- Owner-drilled well
- A state landowner permit, financial security and fee are required before work11
Who to call
Building permits
Josephine County Building Safety Division
Building permits, plan review, and inspections for unincorporated Josephine County
700 NW Dimmick St., Suite C, Grants Pass, OR 97526
Planning & zoning
Josephine County Planning Division
Zoning and land-use review under County Code Title 19, including land-use checks for building and septic applications
700 NW Dimmick St., Suite C, Grants Pass, OR 97526
Septic permits
Oregon DEQ — Residential Septic Permitting (Medford Office)
Residential and small-business septic permitting for Josephine County through the DEQ Medford office
Contact details are copied from each office’s official page and were checked against it on October 11, 2026.
Off-grid gear
Going off-grid in Josephine County means bringing your own water and power. The kit we’d start with:
- Water Crystal Quest Filter any source — well, rain, or creek — to drinking-clean.
- Power Bluetti Solar generators and home battery backup for living off the grid.
- Septic Soil percolation test kit Run your own perc test before paying an engineer — the first thing a septic office asks about.
- Water Well water test kit Bacteria, nitrates, hardness — know what the well on a parcel is really pumping.
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Do you need a building permit in Josephine County, Oregon?
Yes. A building permit is required to construct, enlarge, alter, repair or move a residential building or structure in unincorporated Josephine County, although exempt work may still need electrical, plumbing or mechanical permits1. The building official reviews construction documents, issues permits and inspects permitted premises under the Oregon Residential Specialty Code12. Qualifying farm or forest-operation buildings can be exempt from the structural specialty code, but the exemption does not erase zoning, land-use, septic, floodplain or specialty-trade requirements13. The owner-builder exemption is narrow: an eligible owner who intends to occupy the home may receive relief only from structural-code requirements for ceiling heights, room sizes and maintaining specified temperatures; the permit must disclose compliance, and some noncompliant work must be recorded with the county clerk9. A residential building generally cannot be occupied until the building official issues a certificate of occupancy, except for permit-exempt work and accessory structures14.
Who issues Josephine County building permits, and how do you reach the office?
Josephine County Building Safety manages plan review, permits and inspections from 700 NW Dimmick St., Suite C, Grants Pass, OR 97526; call (541) 474-540515. Use the county portal to submit building-permit applications and required plans; schedule inspections online or call (541) 474-54081615. Josephine County Planning is at the same address and can be reached at (541) 474-5421 for zoning and land-use review under County Code Title 1917. Planning also verifies land-use compliance for building and septic applications, so confirm the parcel's zoning and proposed use there before finalizing construction plans17. County permit fees vary with valuation, area, permit type and inspection needs; the published schedule adds a plan-review fee equal to 65% of the permit fee18. Completed online applications are reviewed before payment and issuance, and a permit is not valid until all fees are paid16. Inside Cave Junction, obtain city zoning clearance before covered construction; the building-permit rule names County Building Safety as the issuing agency19. Oregon DEQ remains the residential septic-permit authority4.
Does Josephine County have zoning?
Josephine County Planning administers rural zoning under Title 19, including some rural-zoned parcels inside the Grants Pass Urban Growth Boundary; urban-zoned parcels there follow Grants Pass rules3. Cave Junction administers city zoning and requires zoning clearance for covered construction; Oregon DEQ handles residential septic permits in Josephine County204. Outside the Grants Pass Urban Growth Boundary, rural-residential new-lot minimums are 5 acres in RR-5, 2.5 acres in RR-2.5 and generally 2 acres in RR-1, subject to exceptions and land-division rules21. Rural-residential setbacks are generally 30 feet front, 10 feet side and 25 feet rear, with a usual height limit of 35 feet2223. Building footprints together may cover no more than 50% of RR-1 and RR-2.5 lots and RR-5 lots smaller than 2.5 acres24. Manufactured dwellings are permitted through ministerial review in rural-residential zones, with a development permit and applicable development standards25. Rural cluster-subdivision lots should accommodate a 1,200-square-foot dwelling, garage, drainfield and replacement drainfield where practicable; that siting goal does not establish a minimum floor area for the home built10.
How do septic permits work in Josephine County?
Oregon DEQ's Medford office directly administers residential and small-business septic permitting in Josephine County4. A permit is required for a new system, alteration or repair; a separate site evaluation may be required and does not authorize construction6. Property within a city limit, urban growth boundary or sanitary district may need a municipal statement on sewer availability with the septic application; legal access, practical connection and system capacity all matter26. After installation, the applicant submits the final-inspection request, notice, as-built drawing, photographs and materials list before DEQ schedules the pre-cover inspection27. Only about 0.4% of county soils are rated without severe limitations for a conventional drain field, so make the site evaluation an early purchase contingency28. A composting toilet still needs a permit and approved wastewater handling for the home's other plumbing29.
Can you live in an RV or tiny home in Josephine County?
On a private lot governed by Josephine County’s rural code, RV occupancy is temporary camping: one landowner camping party or one party with the landowner's permission may camp subject to approved waste disposal, doubled dwelling setbacks and post-stay storage rules7. Camping is limited to 30 total days in a consecutive six-month period in exclusive-farm, farm-resource, forest-commercial and woodlot-resource zones, or 120 total days in a consecutive 12-month period in other zones where camping is allowed7. RVs may also serve as accommodations in an approved transitional housing camp, but the camp needs a conditional-use hearing, an onsite manager, approved sanitation and water, and a location in a zone allowing recreation parks or campgrounds30. Tiny homes on wheels up to 320 square feet are allowed in that transitional-camp setting, which must meet state campground guidelines and receive a conditional-use permit with a hearing8. We could not confirm a general tiny-home occupancy rule outside transitional housing camps; ask Josephine County Planning and Building Safety how a proposed unit will be classified1715.
What are the steps to build a home in Josephine County?
- Ask Planning to verify the governing jurisdiction, zoning, dwelling type, setbacks, height and required land-use approval before design work17312223.
- Check the flood-hazard overlay; mapped flood-hazard development needs a permit, and floodway work requires pre-application for site-plan review32.
- Establish water and wastewater feasibility early; DEQ handles septic permits, and properties near public sewer may need a sewer-availability statement instead626.
- Resolve driveway access: contact Josephine County Public Works for a county-road approach, or ODOT for a state-highway approach3334.
- Submit plans and required documents through the county portal, wait for review, and pay every fee before treating the permit as valid16.
What should you check before buying land in Josephine County?
Start with the governing zoning jurisdiction, legal access, flood exposure, water and septic feasibility rather than the listing description31. Josephine County Planning checks land-use compliance for both building and septic applications, and the Planning Director administers the county flood-hazard overlay1732. For residential-zone development, a driveway onto a county road goes through Josephine County Public Works, while a new approach to a state highway requires an ODOT permit3334. Septic deserves special attention because only about 0.4% of county soils are rated without severe limitations for a conventional drain field28. In rural areas outside the Grants Pass Urban Growth Boundary, subdivision lots require tentative-plan and final-plat approval before division or sale36. A rural-residential ADU requires at least 2 acres, is limited to one per lot and 900 square feet, and must be within 100 feet of the existing home, with water, fire and sanitation conditions37. Federal ownership covers about 69.2% of Josephine County, so verify that mapped access is a recorded, usable right to the parcel rather than merely an adjacent public-land route38. For an owner-drilled water-supply well, Oregon requires a landowner permit, a $10,000 bond or irrevocable letter of credit, and a $550 fee before work begins11.
Watch-outs
- Private-lot RV occupancy is temporary camping, with zone-based duration, sanitation, doubled-setback and post-stay storage limits7.
- A dwelling cannot be used as a vacation or resort rental unless another provision of Josephine County's land-use code approves that use39.
- A floodplain development permit can apply even to nonstructural work such as filling, grading, paving or excavation in a county flood-hazard area32.
- A composting toilet does not remove wastewater permitting: other plumbing still needs an approved disposal system, and graywater reuse requires a DEQ permit29.
Sources
- About Oregon residential building permits, quoted and re-checked
- Planning, quoted and re-checked
- Planning, quoted and re-checked
- Residential Septic Permitting, quoted and re-checked
- Planning, quoted and re-checked
- Residential Septic Permitting, quoted and re-checked
- Chapter 19.98 Camping, Campgrounds, RV Parks, Lodges and Retreat Centers, quoted and re-checked
- ecode360.com, quoted and re-checked
- 2023 Oregon Residential Specialty Code - Chapter 1, quoted and re-checked
- ecode360.com, quoted and re-checked
- Landowner Constructed Wells, quoted and re-checked
- 2026 Oregon Residential Specialty Code, Chapter 1, quoted and re-checked
- ORS 455.315 Exemption of agricultural buildings, agricultural grading, equine facilities and dog training facilities, quoted and re-checked
- 2023 Oregon Residential Specialty Code — Chapter 1, quoted and re-checked
- Josephine County Building Safety Division (josephinecounty.gov)
- Josephine County Online Public Portal, quoted and re-checked
- Josephine County Planning Division (josephinecounty.gov)
- Josephine County Community Development Building Safety Fee Schedule, quoted and re-checked
- Cave Junction: 17.14.110 - Permit required (Josephine County), quoted and re-checked
- Cave Junction: 17.20.040 - Lot and yard requirements (Josephine County), quoted and re-checked
- ecode360.com, quoted and re-checked
- Chapter 19.10: Adoption, quoted and re-checked
- Chapter 19.10: Adoption, quoted and re-checked
- ecode360.com, quoted and re-checked
- Chapter 19.61 Rural Residential Zones, quoted and re-checked
- Onsite Wastewater (Septic) Rules Update, quoted and re-checked
- Residential Septic Permitting, quoted and re-checked
- Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data
- Considerations for Installing a Composting Toilet System, quoted and re-checked
- ecode360.com, quoted and re-checked
- Planning, quoted and re-checked
- Chapter 19.69A: Flood Hazard Overlay, quoted and re-checked
- Josephine County Community Development Residential Permit Procedures, quoted and re-checked
- Oregon Department of Transportation: Permits, quoted and re-checked
- Residential Structures Code Program, quoted and re-checked
- Planning, quoted and re-checked
- Chapter 19.61 Rural Residential Zones, quoted and re-checked
- Federal land share: Bolthole Index county data
- ecode360.com, quoted and re-checked
Written October 11, 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.