Building permits, zoning and land rules in Deschutes County, Oregon

Yes. In unincorporated Deschutes County, new construction and structural, plumbing, mechanical and electrical alterations need permits under the Oregon Residential Specialty Code, administered by Deschutes County Community Development¹. Oregon's adopted residential code governs one- and two-family dwellings and townhouses and is based on the International Residential Code¹⁴. The owner or the owner's agent must get the permit before regulated work begins, and new habitable rooms or bathrooms always need one². Each county permit needs at least one inspection, all applicable permits need approved finals, and a new dwelling or townhouse needs a certificate of occupancy before use unless the building official issues a temporary certificate^2,15.

Since April 1, 2026, all new dwellings and new accessory structures in unincorporated Deschutes County must meet the Section R327 fire-hardening standard⁵. Non-habitable sheds under 400 square feet and no taller than 15 feet are exempt, as are additions and HUD-code manufactured homes⁵. Qualifying farm and horse buildings may be exempt from structural permits, but electrical, mechanical and plumbing permits still apply¹⁶.

The 2026 Oregon Residential Specialty Code took effect on October 1, 2026, with a six-month phase-in: until April 1, 2027, builders may use either the 2023 or the 2026 edition, and the 2026 construction provisions become mandatory on April 1, 2027¹⁴. Ask the Building Safety Division which edition your plans should follow.

Deschutes County Community Development handles building, septic and planning permits from one building at 117 NW Lafayette Avenue in Bend³. The Building Safety Division issues building permits, and plans examiners answer project questions in person Monday through Friday, 9 am to 4 pm, or at 541-385-1743^4,5. The Planning Division's Planner of the Day takes zoning questions at 541-388-6560 or planning@deschutes.org³.

Building and septic permits are filed online through Oregon ePermitting, but planning permits are not⁴. Planning applications may be emailed, delivered in person or mailed, and the fee depends on the application and current schedule^3,17. Plan on the queue: about 1 week for intake, 10 days for planning review, 8-9 weeks for building review and 4-6 weeks for septic review⁶. An incomplete application is withdrawn, not held, so upload every document at once⁶. Incorporated municipalities may administer their own zoning, so use the appropriate city office for land inside city limits¹⁸.

Yes. Unincorporated Deschutes County has base zones that set allowed uses, minimum parcel size and development standards, plus combining or overlay zones that add conditions⁷. Look up your parcel's zones in the county's DIAL property information system⁷. Subdivisions and plats also receive county review under Oregon law and local ordinances, with zoning, septic, access and dimensional requirements depending on the proposal¹⁹.

Minimum parcel sizes for a standard land division are 10 acres in the RR-10, MUA-10 and UAR-10 zones, and 80 acres for non-irrigated EFU land and the F1/F2 forest zones¹¹. Setbacks differ by zone: RR-10 requires 20 feet in front from a local street, 10 feet on the sides and 20 feet in the rear¹¹. In MUA-10, side and rear setbacks grow to 100 feet for a dwelling next to land with farm tax deferral¹¹. We could not confirm a general county minimum home size; qualifying owner-builders may instead claim a narrow state exemption from structural-code rules for room size, ceiling height and temperature, but permits and other rules remain¹³.

In the RR-10 zone, a house and its accessory buildings together may cover no more than 30 percent of the lot, and no building may exceed 30 feet in height unless an exception applies²⁰. Short-term rentals are not allowed in Forest Use Zones or Exclusive Farm Use Zones, which matters if you plan to rent a cabin on resource land²¹. No new dwelling, manufactured home or accessory structure is allowed in the floodway of a river or stream, and building elsewhere in the flood plain requires showing that no alternative site on the parcel exists²².

The Deschutes County Onsite Wastewater Division issues septic permits, and an approved site evaluation is required before you apply for a new one⁸. Dig 3 to 5 test pits before the evaluation; the report sets the minimum system and where it can go⁹. If a valid evaluation is already on file for the parcel, you do not need a new one⁹. Frozen winter ground can stop a site evaluation, so apply early⁴.

Where public sewer is unavailable, a home needs an approved onsite system, and every fixture that generates human wastewater must connect to an approved sewage system²³. Soils are a real constraint: the NRCS rates only 2.9% of the county's soils free of severe limits for a conventional drain field²⁴. Sand filter, pressure distribution and ATT systems need extra documents and a signed operation and maintenance contract⁸. In southern Deschutes County, DEQ reviews each site, and the usual result is a nitrogen-reducing treatment system²⁵. Systems are inspected before backfill and again at final²⁶. Pit privies are prohibited under county code, so an off-grid cabin still needs an approved onsite system²³.

Only on a limited basis. On vacant land with no dwelling, one RV may be used for up to 30 total days in any rolling 60-day period without a permit, or up to 6 months in a calendar year with a Temporary Use Permit; wastewater must be disposed of lawfully and the use cannot become permanent housing¹⁰. While you build, you may live in an RV once the building permit is issued, until 18 months after issuance or 2 months after completion, whichever comes first¹⁰. On a lot with an established dwelling, an RV is for storage only, except for a planning-approved medical hardship²⁷.

An RV rental dwelling is allowed in the RR-10, MUA-10, UAR-10, SR 2½ and WTZ zones on at least 2 acres, with an owner-occupied main house¹⁰. A tiny home qualifies for that use only if titled as an RV, typically no wider than 8.5 feet, with no decks or porches attached²⁸. An ADU is allowed only in rural residential exception areas, up to 900 square feet and within 100 feet of the main house²⁸. A manufactured dwelling needs its placement permit after any required planning review, septic approval and driveway-access work²⁹.

1. Pull the parcel's report in DIAL to confirm zones and any past permits or site evaluations^7,9.
2. Ask the Planner of the Day whether your house needs a land-use permit, and apply by email if it does³.
3. Dig 3 to 5 test pits and apply for a septic site evaluation, avoiding frozen-ground months^4,9.
4. Apply for the onsite (septic) permit through Oregon ePermitting; review takes 4-6 weeks⁶.
5. Get a driveway access permit; Road Department review takes about 3 weeks⁶.
6. Apply for the building permit with fire-hardened plans; building review takes 8-9 weeks^5,6.
7. If you drill your own well, get the state landowner permit and post the bond first¹².
8. Schedule every required inspection, obtain approved finals on related permits, and secure the certificate of occupancy before moving into a new home^2,15.

Check water first. A landowner drilling their own well needs a $550 state permit and a $10,000 bond or letter of credit before work begins¹². The county has had severe drought in 32.8% of years, and rain averages 22.9 inches a year²⁴. Check the septic record in DIAL: a valid site evaluation on file saves time and money⁹. In the south county, budget for a nitrogen-reducing system²⁵.

Wildfire shapes the build: fire-hardening rules apply to every new house and most new outbuildings⁵. About 76.6% of the county is federal land, and 49.6% is wooded²⁴. Land is expensive: farmland averages about $12,883 an acre, and a typical home is worth about $672,041²⁴. The effective tax rate is 0.6%, with a median bill of $3,670²⁴. From the county center, the nearest city of 100,000 or more people is about 5 miles away²⁴.