Sherman County, Oregon requires a building permit, with land-use approval from the county Planning Department before the Oregon Building Codes Division's Pendleton field office issues building-code permits.1 Sherman County also has county zoning, and North Central Public Health District handles septic permits.23
At a glance
- Building permit
- Required; obtain county land-use approval first1
- Zoning
- Yes; the county Planning Department administers land-use applications2
- Septic
- Permit required through North Central Public Health District34
- RV living
- County parcel-specific approval is not confirmed; ask Planning before relying on RV occupancy5
- Tiny home
- County occupancy rules are not confirmed; zoning and building approval still matter21
- Owner-builder
- A limited state structural-code exemption is available, but a permit is still required6
- Private well
- Landowner well construction requires a state permit unless done by a licensed and bonded constructor7
Who to call
Planning & zoning
Sherman County Community Development and Planning Department
Land-use planning applications and inquiries, zoning, and local approval before state building permits
66365 Lonerock Road, Moro, OR 97039
Building permits
Oregon Building Codes Division — Pendleton field office
Plan review, permitting, and inspections for Sherman County after local approvals
800 SE Emigrant Ave., Suite 360, Pendleton, OR 97801
Septic permits
North Central Public Health District — Onsite Wastewater Program
Septic site evaluations, permits, authorizations, and inspections in Sherman County
Contact details are copied from each office’s official page and were checked against it on September 27, 2026.
Do you need a building permit in Sherman County, Oregon?
Yes. Sherman County requires a building permit, but the work is divided between local and state offices: obtain land-use approval from the Sherman County Planning Department before the Oregon Building Codes Division's Pendleton field office issues the building-code permit.1 Oregon's residential specialty code governs construction, reconstruction and repair of one- and two-family dwellings and townhouses.8
A qualifying agricultural building can receive an exemption from the structural permit and inspections, but that exemption does not cover a dwelling or erase permits for electrical, mechanical, plumbing or septic work.9 The local Planning Department must approve the proposed agricultural use and zoning before the state will recognize the exemption.9
Who issues building permits in Sherman County, Oregon?
Sherman County's Community Development and Planning Department processes land-use applications and inquiries and is the first office to contact about a rural parcel.10 The Planning Department is at 66365 Lonerock Road in Moro and can be reached at 541-565-3601.10
After county land-use approval, the Oregon Building Codes Division's Pendleton field office provides plan review, building permits and inspections for Sherman County.1 The Pendleton office is at 800 SE Emigrant Ave., Suite 360 in Pendleton and its main number is 541-276-7814.11 State building-code fees vary with the work type and valuation method, while Sherman County publishes a separate schedule for land-use applications.1213
Does Sherman County, Oregon have zoning?
Yes. Sherman County administers zoning and land-use controls through its Planning Department, which publishes a zoning map and links the county zoning ordinance.1415 A parcel's zoning can determine which uses need a conditional-use permit, variance or other application.14
We could not confirm a single countywide minimum dwelling size, setback, lot-coverage limit or building-height limit from the available official material, so ask the Planning Department for the standards tied to the parcel's zone.2 Oregon resource-land rules set conditional minimum parcel sizes of 80 acres for exclusive farm-use land not designated rangeland, 160 acres for designated rangeland, and 80 acres for designated forestland, but statutory exceptions can apply.16 Those resource-land figures do not substitute for a parcel-level zoning determination from Sherman County.2
How do septic permits work in Sherman County, Oregon?
North Central Public Health District administers Sherman County's onsite wastewater program as Oregon DEQ's local agent.17 A septic permit is required to install, alter or repair a system, and a site evaluation alone does not authorize construction.4 After installation, an Environmental Health Specialist must inspect and approve the system before it is covered.18
Only about 26% of Sherman County soils are rated without severe limits for a conventional septic drain field, so a site evaluation belongs early in due diligence.19 Where public sewer is unavailable, household plumbing fixtures that generate wastewater must connect to an approved onsite wastewater system.20 North Central Public Health District's onsite-wastewater office can be reached at (541)506-2603 for application help.21
Can you live in an RV or tiny home in Sherman County, Oregon?
Do not assume that owning rural land makes full-time RV occupancy legal in Sherman County. Oregon law protects RV occupancy only in specified settings and lets a county choose whether to allow one residential RV on certain rural parcels subject to conditions.225 We could not confirm that Sherman County has adopted that optional rural-RV allowance, so ask the Planning Department about the parcel and proposed duration before moving in.2
We also could not confirm a Sherman County rule specifically authorizing tiny-home occupancy.2 A tiny home intended as a dwelling still needs a zoning answer, and construction subject to Oregon's residential code requires the applicable building approval.21 Composting toilets do not eliminate the need for an approved wastewater system for the home's remaining wastewater.23
Building a home in Sherman County, Oregon: steps in order
1. Ask the Sherman County Planning Department to identify the parcel's zone, allowed dwelling use and required land-use application.14 + 2. Confirm water and wastewater feasibility before finalizing the house plan; North Central Public Health District requires septic approval for a new onsite system.4 + 3. Obtain county land-use approval, then submit plans to the Oregon Building Codes Division's Pendleton field office for building-code review and permits.1 + 4. If the driveway will connect to an Oregon state highway, submit the state highway-approach application to ODOT.24 + 5. Schedule required building inspections through the state office and the septic pre-cover inspection through North Central Public Health District.118 + An owner-builder exemption can relax only specified structural-code requirements; Oregon still requires a building permit documenting whether the project complies with the exempted requirements.6
What should you check before buying land in Sherman County?
Start with a written parcel-level zoning answer from the Sherman County Planning Department, especially for a dwelling, RV, tiny home, land division or agricultural structure.2 A proposed partition requires county application materials covering boundaries, access, existing buildings, septic facilities, water supply, sewage disposal and intended use.25
Check septic feasibility early because only about 26% of county soils are rated without severe limits for a conventional drain field.19 Sherman County averages about 13.3 inches of precipitation annually and has experienced severe drought in about 24.7% of years, making a dependable water plan especially important.2627 A landowner who personally constructs, alters, converts or abandons a water-supply well generally needs a state permit, fee and bond unless licensed and bonded as a Water Supply Well Constructor.7 Finally, verify legal road access; a new approach to a state highway requires an ODOT permit.24
Watch-outs
- County land-use approval comes before the state field office can issue the building-code permit.1
- A farm-building structural exemption does not cover a dwelling, septic, plumbing, electrical or mechanical permits.9
- Only about 26% of Sherman County soils are rated without severe limits for a conventional septic drain field.19
- Sherman County's parcel-specific RV, tiny-home, setback and minimum-dwelling-size rules could not be confirmed; ask the Planning Department before purchase or occupancy.2
Sources
- Oregon Building Codes Division - Sherman County Permit Services (2026 county census)
- Planning Department | Sherman County, OR (2026 county census)
- North Central Public Health District - Septic Systems (2026 county census)
- Septic Systems — North Central Public Health, quoted and re-checked
- Oregon Revised Statutes, ORS 215.490 (Oregon statewide rule), quoted and re-checked
- 2023 Oregon Residential Specialty Code - ORS 455.320 reprinted (Oregon statewide rule), quoted and re-checked
- Landowner Constructed Wells, quoted and re-checked
- Residential Structures Code Program (Oregon statewide rule), quoted and re-checked
- Farm Agriculture/Equine Building Exemption Request, quoted and re-checked
- Sherman County Community Development and Planning Department (shermancountyor.gov)
- Oregon Building Codes Division — Pendleton field office (oregon.gov)
- Valuation and fee requirements by work/record type (Oregon statewide rule), quoted and re-checked
- Land Use Fee Schedule, quoted and re-checked
- Planning Department | Sherman County, OR, quoted and re-checked
- Planning Department | Sherman County, OR, quoted and re-checked
- Oregon Revised Statutes, Chapter 215 (Oregon statewide rule), quoted and re-checked
- Septic Systems — North Central Public Health, quoted and re-checked
- Septic Systems — North Central Public Health, quoted and re-checked
- Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
- Septic Systems — North Central Public Health, quoted and re-checked
- North Central Public Health District — Onsite Wastewater Program (ncphd.org)
- Oregon Revised Statutes, ORS 197.493 (Oregon statewide rule), quoted and re-checked
- What do I do with the finished material? (Oregon statewide rule), quoted and re-checked
- Permits, quoted and re-checked
- Land Partition Application, quoted and re-checked
- Annual precipitation: Bolthole Index county data
- Share of years in severe drought: Bolthole Index county data
Written September 27, 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.