Building permits, zoning and septic rules in Klamath County, Oregon

Yes. Klamath County, Oregon requires a building permit to construct, enlarge, alter, repair or move a residential building or structure¹⁰. The Klamath County Building Division administers and enforces the Oregon Residential Specialty Code, including plan review, for residential construction in the unincorporated county¹. Oregon's 2023 Residential Specialty Code, based on the 2021 International Residential Code, became mandatory for construction on April 1, 2024¹¹. The 2026 Residential Specialty Code takes effect October 1, 2026 with a six-month phase-in during which either edition may be used, and becomes mandatory April 1, 2027¹¹. Every permit carries a required number of inspections, and the building official must issue a certificate of occupancy before you can occupy a new dwelling, unless a temporary certificate is issued instead^1,5.

The Klamath County Building Division issues residential building permits and performs the required plan review and inspections¹. Reach the Building Division at 305 Main Street, Klamath Falls, Oregon 97601, phone 541-883-5121 option 1, fax 541-885-3644, or by email at askbuildingdepartment@klamathcounty.org¹. Structural permit applications can be submitted online through Oregon's ePermitting system along with the county's mandatory checklist¹². Oregon's owner-builder rule does not waive the building permit; it conditionally exempts an owner-built home or adjacent outbuilding only from structural-code requirements for ceiling heights, room sizes and maintaining specified temperatures⁵. The owner must intend to occupy the home, meet the ownership and prior-use conditions, and may use unpaid help from friends or relatives⁵. A separate exemption may be available for qualifying agricultural or forest buildings used primarily for profit, but not for dwellings or living areas, and the project must still satisfy county land-use requirements¹³.

Yes. The Klamath County Land Development Code replaces the county's earlier zoning and subdivision ordinances; permitted uses, conditional uses, overlays and development standards must be checked against the parcel's zoning². Inside the Klamath Falls Urban Growth Boundary but outside city limits, county districts and overlays are published in the county plan; land inside Klamath Falls city limits follows the city's ordinance instead¹⁴. Setbacks and height limits depend on the district: residential districts generally cap building height at 35 feet, resource districts including EFU, forest and NR require 25-foot setbacks on every side, and structures and septic systems generally must stay at least 100 feet from streams, surface water or wetlands². In specified residential zones within the Klamath Falls, Chiloquin, Merrill, Malin and Bonanza urban growth boundaries, an accessory dwelling requires site-plan review and generally may not exceed 800 square feet or 50% of the existing dwelling, whichever is smaller¹⁵. Minimum lot size varies by rural residential zone: R-1 requires at least 1 acre, R-2 at least 2 acres, R-5 at least 5 acres and R-10 at least 10 acres, and each allows one dwelling per lot or parcel². Manufactured-home rules also vary by zone². Confirm the parcel with the Planning Division at 541-883-5121 option 4¹⁶.

Where public sewer is unavailable, Klamath County requires an approved onsite septic system for residential or commercial wastewater⁴. Start with a favorable site evaluation and obtain a Land Use Compatibility Statement from the Planning Department before applying to the Septic/On-Site Division⁴. Reach the division at 305 Main Street, Klamath Falls, Oregon 97601, phone 541-883-5121 option 6, fax 541-885-3644, or email onsite@klamathcountyor.gov⁴. Only the property owner or a DEQ-licensed installer may install the system; unpaid friends or family may not do the work⁷. After installation, request the required final inspection and approval from a Wastewater Specialist⁴. Only 4.9% of Klamath County soils have no severe limitation for a conventional drain field under the USDA soil survey, so establish septic feasibility before choosing a house site⁸. A composting or incinerating toilet does not remove the septic requirement and separately needs a Building Division permit⁷.

Klamath County does not allow an RV as general housing; residential use is limited to living on the parcel during construction of a dwelling or temporarily caring for a relative, with a Temporary Use Permit and applicable health and building approvals⁶. Ordinary camping on private property is allowed in every zone for up to 21 days in any 6-month period: the first 7 days do not require a permit, while days 8 through 21 require a posted permit, and at least 14 days must separate stays⁶. Once the dwelling's building permit has issued, an owner may apply for the Temporary Use Permit needed to occupy an RV while building⁶. A tiny dwelling is allowed if it meets the Oregon Residential Specialty Code; the county identifies approximately 300 square feet as the smallest size meeting that code, and alternative materials or styles need a registered engineer to certify equivalence⁷. A composting or incinerating toilet does not eliminate the septic requirement⁷.

1. Confirm the parcel's jurisdiction, zoning district, allowed use and overlays with the Planning Division at 541-883-5121 option 4^2,16.
2. Determine whether public or district utilities must serve the site or whether approved rural well and septic options are available¹⁷.
3. For a septic site, obtain a favorable site evaluation and a Land Use Compatibility Statement, then apply through the Septic/On-Site Division⁴.
4. Apply for the residential building permit through the Building Division, in person or through Oregon's ePermitting system^1,12.
5. After the dwelling permit issues, apply for a Temporary Use Permit if you want to occupy an RV while building⁷.
6. Obtain a floodplain development permit before work in a flood hazard area¹⁸.
7. Apply through Public Works for a new driveway or road approach onto a county right-of-way^19,20.
8. Complete the required inspections and obtain a certificate of occupancy before moving into the new dwelling^1,5.

Check septic feasibility early: only 4.9% of Klamath County soils have no severe limitation for a conventional drain field under the USDA soil survey⁸. Confirm whether the parcel must connect to a public or district system or may use approved rural water and septic options¹⁷. If you plan to divide land, Klamath County requires preliminary and final subdivision review, including access, infrastructure, public-facility and onsite-sewage considerations². If an owner plans to construct, alter, convert or abandon a water-supply well personally, Oregon requires a landowner permit, fee and financial security before work begins unless the owner is a licensed and bonded well constructor⁹. For farm, ranch or forest-zoned land, Oregon sets minimum lot sizes of at least 80 acres for exclusive farm use land, 160 acres for designated rangeland and 80 acres for designated forestland²¹. Federal land covers 59.8% of Klamath County, and the county experienced severe drought in roughly 40.1% of recent years⁸. About 68.6% of the terrain has slopes of 15% or less, while 63.5% is wooded⁸. The effective property tax rate is about 0.7%, with a median annual bill near $1,734⁸.