Bolthole Index

Gilliam County, Oregon

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

36Index Score / 100
#36 of 36 in Oregon

Gilliam County, Oregon requires building permits for residential construction, while Gilliam County Planning handles zoning and land-use approval.12 The City of Boardman administers Gilliam County's building program, and Umatilla County Public Health issues septic permits for properties not served by public sewer.34

At a glance

Building permit
Required for residential construction, subject to listed exemptions1
Building office
City of Boardman Building Department3
Zoning
Gilliam County administers local zoning and land-use rules2
Septic
Umatilla County Public Health permits systems not served by public sewer54
RV living
County approval for rural residential occupancy is not confirmed; ask Planning6
Tiny home
Parcel-specific zoning and occupancy approval must be confirmed with Planning2
Owner-builder
A limited structural-code exemption is available, but a permit is still required7
Well
A landowner doing the well work needs a state permit, fee and financial security8

Who to call

Planning & zoning

Gilliam County Planning Department

Zoning information, land-use applications and zoning approval for Gilliam County

541-351-9342

[email protected]

221 S. Oregon Street PO Box 427 Condon, Oregon 97823

Building permits

City of Boardman Building Department

Building, mechanical, plumbing and electrical permits and plan reviews for Gilliam County

541-626-7011

200 City Center Circle | P.O. Box 229 | Boardman, Oregon 97818

Septic permits

Umatilla County Public Health Environmental Health

Onsite septic permits and inspections for Gilliam County

541-278-5432

[email protected]

Pendleton Office : 200 SE 3rd St.

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 Gilliam County, Oregon?

Yes. A building permit is required to construct, enlarge, alter, repair or move a residential building or structure in Gilliam County.1 Some minor work is exempt, including a qualifying one-story, nonhabitable detached accessory structure under 200 square feet and under 15 feet high, but exempt structural work can still need mechanical, electrical, plumbing or land-use approval.1

Permitted work is inspected as construction progresses, and work cannot continue beyond an inspection point without the building official's approval.9 A new dwelling or townhouse needs a certificate of occupancy before anyone moves in unless the building official issues a temporary certificate.10

Who issues building permits in Gilliam County?

The City of Boardman administers the building program for Gilliam County.11 Boardman's Building Department handles residential and commercial building, mechanical, plumbing and electrical permits, along with plan reviews.11 Call the office at 541-626-7011 before preparing an application.11

Gilliam County Planning does not issue building permits, but its zoning approval is required before Boardman issues a permit.3 Planning reviews zoning permits, conditional-use permits, partitions and other land-use actions; call 541-351-9342 or email [email protected] for parcel-level direction.12 Complete building applications may be submitted in person, by mail, email, fax or Oregon ePermitting.3

Does Gilliam County have zoning?

Yes. Gilliam County Planning administers and enforces local and Oregon land-use laws, including the county comprehensive plan and zoning and subdivision ordinance.2 The department reviews zoning permits, conditional uses and land partitions, so a property's zone and proposed use should be cleared before building plans are finalized.12

State resource-land standards can matter on rural acreage: subject to statutory exceptions, exclusive farm-use land has an 80-acre minimum lot size, designated rangeland has a 160-acre minimum, and designated forestland has an 80-acre minimum.13 Gilliam County's minimum dwelling floor area could not be confirmed; ask Planning whether the parcel's zone imposes a size, setback or use standard.

How do septic permits work in Gilliam County?

Umatilla County Public Health administers onsite septic services for Gilliam County.5 For a household that is not served by public sewer, UCO Health issues the septic permit and provides separate packets for site evaluation, construction, repair and alteration.4 The agency also inspects onsite systems for proper installation and treatment.14

Soil suitability deserves early attention: only about 19.2% of Gilliam County soils are rated without severe limitations for a conventional septic drain field.15 Contact Environmental Health at 541-278-5432 or [email protected] before relying on a homesite or house layout.16 Alternative off-grid sanitation permission could not be confirmed; ask Environmental Health what wastewater system it will approve.

Can you live in an RV or tiny home in Gilliam County?

Do not assume a rural parcel allows full-time RV occupancy. Oregon law lets a county elect to allow one residential-use RV on a rural lot under specific conditions, including an existing owner-occupied primary residence, no other dwelling units and owner-provided essential services; the available material does not confirm that Gilliam County adopted that option.6 Ask Gilliam County Planning whether the parcel's zone permits the intended RV use.

Gilliam County's rules for tiny-home occupancy and any minimum dwelling size could not be confirmed. Ask Planning to classify the proposed unit and confirm zoning, setbacks and occupancy requirements before purchase. A manufactured dwelling may be occupied on private Oregon land with owner consent only when water, sewage and other applicable standards are satisfied.17

Building a home in Gilliam County: steps in order

  1. Ask Gilliam County Planning to verify the parcel's zone, allowed dwelling use and required land-use approvals.2
  2. If the site lacks public sewer, arrange Umatilla County Public Health's site evaluation and septic permitting.4
  3. Resolve driveway access; county standards apply to properties abutting arterials and collectors, and one-way driveways must be 10 to 12 feet wide.18
  4. Obtain any floodplain development permit before work starts in an unincorporated special flood-hazard area.19
  5. Submit the building application to the City of Boardman after Gilliam County zoning approval and applicable onsite sewage approval.3
  6. Request required inspections as construction progresses and obtain the certificate of occupancy before moving into a new dwelling.910

What should you check before buying land in Gilliam County?

Start with zoning, legal access, flood exposure, water and wastewater rather than assuming a vacant parcel is buildable. Gilliam County requires a development permit before construction or development begins in an unincorporated special flood-hazard area.19 County access standards also regulate driveways serving properties along arterials and collectors.18

Gilliam County averages about 11.4 inches of precipitation a year, so confirm a lawful and reliable water source.20 A landowner personally constructing, altering, converting or abandoning a water-supply well must obtain the state permit and required financial security before work begins.8 Typical farmland value is about $1,338 per acre, while the median annual property-tax bill is about $1,597; treat both as countywide context, not a parcel appraisal or tax quote.2122

Watch-outs

  • Gilliam County zoning approval and applicable onsite sewage approval come before issuance of the building permit.3
  • Qualifying agricultural buildings may be exempt from the structural specialty code, but electrical, plumbing and mechanical permits still apply.23
  • The owner-builder provision is narrow: a permit is still issued, and the exemption concerns specified structural-code requirements rather than all building rules.7
  • Gilliam County permit fees were not confirmed; Oregon building-code fees vary by work type and local fees may also apply, so request a current project-specific estimate from the City of Boardman before budgeting.24

Sources

  1. About Oregon residential building permits, quoted and re-checked
  2. Planning Department, quoted and re-checked
  3. Gilliam County Building Permits, quoted and re-checked
  4. Planning Department Services, quoted and re-checked
  5. Planning Department Services, quoted and re-checked
  6. Oregon Revised Statutes, ORS 215.490 (Oregon statewide rule), quoted and re-checked
  7. 2023 Oregon Residential Specialty Code - Chapter 1, quoted and re-checked
  8. Landowner Constructed Wells, quoted and re-checked
  9. 2023 Oregon Residential Specialty Code - Chapter 1, quoted and re-checked
  10. 2023 Oregon Residential Specialty Code - Chapter 1, quoted and re-checked
  11. City of Boardman Building Department (cityofboardman.com)
  12. Gilliam County Planning Department (gilliamcountyor.gov)
  13. Oregon Revised Statutes, Chapter 215 (Oregon statewide rule), quoted and re-checked
  14. Onsite Sewage and Septic Information, quoted and re-checked
  15. Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
  16. Umatilla County Public Health Environmental Health (ucohealth.net)
  17. Oregon Revised Statutes, ORS 446.125 (Oregon statewide rule), quoted and re-checked
  18. Gilliam County Zoning and Land Development Ordinance, quoted and re-checked
  19. Gilliam County Zoning and Land Development Ordinance, quoted and re-checked
  20. Annual precipitation: Bolthole Index county data
  21. Farmland value per acre (USDA census): Bolthole Index county data
  22. Median property tax bill: Bolthole Index county data
  23. Oregon Revised Statutes, Chapter 455 (Oregon statewide rule), quoted and re-checked
  24. Valuation and fee requirements by work/record type (Oregon statewide rule), quoted and re-checked

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.

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County locator

Gilliam County in Oregon

36
County map
Gilliam County highlighted among the Oregon counties · colored by Index score

How Gilliam County scores

Seclusion84100% ev.
Self-Sufficiency1292% ev.
Admin Boringness42100% ev.
Durability39100% ev.
Property Autonomy72100% ev.
Carry Cost78100% ev.

Evidence strength: 98%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$252kTypical home
1%Property tax
$1,338Land / acre
11.4"Annual rain
22.1% of yrsSevere drought
9.5 / yr (+7.5)Mid-century 100°F days
37.4 daysMid-century dry spell
0.63" (+4.9%)Mid-century 1-day rain
1.16×Wildfire change factor
100%Forward climate coverage
$1,113Home insurance / yr
4.6% / yrInsurance growth
0.3%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
423,730People within 2 hr
1,111Radius comparison (15 mi)
1.7People / sq mi
10.6%Federal land
54.6%Land at 15% slope or less
19.2%Septic soil without severe limits
144,411 acWorkable land screen
1.2%Wooded land
50.8°FAvg temp

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Answers from the rulebook for Gilliam County

What the ordinances and state agencies actually say — one answer per question, each quoted from the official source and independently re-checked.

Gilliam County rules

  • Local zoningPresent (with conditions)

    Local zoning regulation administered through Gilliam County's planning and zoning program.

    • The county planning department states that it provides planning and zoning information and administers and enforces local and Oregon State land-use laws, regulations, and ordinances.
    • The page identifies zoning permits and conditional-use permits among the land-use actions reviewed.
    “Administer and enforce local and Oregon State land use laws, regulations and ordinances, including the Gilliam County Comprehensive Plan and Zoning and Subdivision Ordinance”
  • Who permits septicCounty

    Sub-surface and onsite septic services in Gilliam County, including unincorporated areas, administered by Umatilla County Public Health.

    “Umatilla County Public Health Environmental Health for Umatilla, Morrow, & Gilliam”
  • Septic permitRequired

    Households in Gilliam County that are not served by public sewer and use onsite septic systems.

    • The source specifically applies to households not served by public sewer.
    • UCO Health provides a site evaluation packet, construction permit packet, and repair and alteration permit packet.
    “UCO Health issues septic system permits for households that are not served by public sewer.”
  • Septic inspectionRequired

    Onsite septic systems in Gilliam County administered by Umatilla County Public Health.

    • The source specifically discusses households not served by public sewer.
    • Inspections are conducted to ensure proper installation, adequate treatment, and prevention of public sewage exposure.
    “UCO Health is also responsible for conducting inspections on these systems to ensure that they are installed properly to provide adequate treatment and prevent sewage exposure to the public.”
  • Driveway accessLimited

    Driveways and access connections serving properties subject to the Gilliam County Zoning and Land Development Ordinance, especially properties abutting arterials and collectors.

    • The access standards apply to all arterials and collectors within Gilliam County and all properties abutting those roadways.
    • One-way-in or one-way-out driveways must be 10 to 12 feet wide and have appropriate one-way signage.
    • For two-way access, each lane must be 10 to 12 feet wide.
    • Driveway approaches must provide an exiting vehicle with an unobstructed view.
    • The County may reduce access-point separation only when specified joint-access, cross-access, unified-circulation, and recorded-agreement conditions are met.
    • The County may modify or waive requirements where abutting-property characteristics or layout make unified or shared access impractical.

    one-way driveway width: 10-12 feet (one-way-in or one-way-out driveway) · two-way driveway lane width: 10-12 feet (each lane)

    “If the driveway is a one-way-in or one-way-out drive, then the driveway shall be a minimum width of 10 feet and a maximum width of 12 feet and shall have appropriate signage designating the driveway as a one-way connection.”
  • Building in a floodplainRequired

    Construction or development, including fill and other defined development, in unincorporated areas of special flood hazard within Gilliam County.

    • The ordinance applies to all unincorporated areas of special flood hazards within Gilliam County jurisdiction.
    • A development permit must be obtained before construction or development begins in an area of special flood hazard.
    • The permit covers all structures, including manufactured homes, and all development including fill and other activities.
    • Applications use forms furnished by the County Planning Director and require scaled plans showing the nature, location, dimensions, and elevations; lowest-floor elevation; flood-proofing elevation; professional certification for nonresidential flood-proofing; and a description of any watercourse alteration or relocation.
    • The County Planning Director administers the section and reviews whether required federal, state, and local approvals have been obtained and whether the site is in the floodway.

    special flood hazard probability: >= 1 percent or greater annual chance

    “A Development Permit shall be obtained before construction or development begins within any area of special flood hazard established in Subsection C of this section.”
  • Permit processPartial

    Building-permit applications for projects in Gilliam County requiring county land-use and zoning approval.

    • Gilliam County Planning Department zoning approval is required before issuance of permits.
    • On-site sewage permitting by Umatilla County Public Health Environmental Health Division is required if applicable.
    • The official Boardman process accepts complete applications in person, by mail, email, fax, or through Oregon ePermitting.
    “The City of Boardman administers the building program for Gilliam County.”
  • County-wide zoningPresent

    Gilliam County has a comprehensive plan and Zoning and Land Development Ordinance providing the legal framework for county land-use regulation under Oregon's statewide planning goals.

    Gilliam County - Comprehensive Plan and Zoning Ordinance ↗Scouted from the county site, not yet independently re-checked

Oregon rules that apply here

  • Building permitRequired

    Residential construction in Gilliam County under Oregon's statewide residential building-code requirements.

    • A permit is required to construct, enlarge, alter, repair, or move a residential building or structure.
    • Specified exemptions apply, including certain nonhabitable detached accessory structures under 200 square feet and less than 15 feet high, and other listed minor work.
    • Work exempt from a building permit may still require mechanical, electrical, plumbing, or land-use approval.
    • The state page states that work not meeting all parameters of a particular exemption requires a local building permit.

    detached nonhabitable accessory structure area exemption: < 200 square feet (Must also be one story, less than 15 feet measured from floor to average roof height.) · deck or porch height exemption: <= 30 inches above adjacent grade (Applies to the listed permit-exempt porch or deck work.)

    “A building permit is required to construct, enlarge, alter, repair, or move a residential building or structure.”
  • Owner-builder exemptionConditional

    Owner-built single-family residences and adjacent auxiliary structures in Gilliam County where the owner intends to occupy the structures.

    • The owner must be the title owner or contract purchaser shown on the last available complete assessment roll.
    • The owner must not have used the exemption during the five years before applying.
    • The structural components must be constructed entirely by the owner, or by the owner and unpaid friends or relatives.
    • The exemption applies only to structural-code requirements for ceiling heights, room sizes, and maintenance of specific temperature levels.
    • A building permit is still issued and must note whether the owner-built dwelling or outbuilding complies with the exempted requirements.
    • If the structure does not comply, the owner-builder must file a copy of the building permit with the county clerk for permanent deed recording and provide a sufficient property description.
    • Noncompliance with the recording provision does not affect conveyances of interests in the property.

    prior exemption lookback: 5 years (Owner must not have taken advantage of the exemptions during the five years before applying.)

    “Owner-built dwellings and outbuildings shall be exempt from any requirements of the structural code for ceiling heights, room sizes and the maintenance of specific temperature levels in those structures.”
    One more reviewed finding on this topic
    • Available (with conditions) — Owner-built single-family residences and adjacent auxiliary structures in Oregon where the structural components are constructed entirely by the owner intending to occupy the structures, or by the owner with unpaid assistance from friends and relatives.
      “Owner-built dwellings and outbuildings shall be exempt from any requirements of the structural code for ceiling heights, room sizes”
  • Building code adoptedAdopted (with conditions)

    Commercial construction, reconstruction, alteration, and repair governed by the Oregon Structural Specialty Code statewide.

    • The 2025 Oregon Structural Specialty Code is based on the 2024 International Building Code, International Fire Code, and International Existing Building Code.
    • Administrative provisions are effective and mandatory October 1, 2025.
    • Construction provisions were effective October 1, 2025 with a six-month phase-in period and became mandatory April 1, 2026.
    • During the phase-in period, use of either the 2022 OSSC or 2025 OSSC was permitted.

    administrative provisions effective and mandatory: 2025-10-01 · construction provisions effective: 2025-10-01 (six-month phase-in period) · construction provisions mandatory: 2026-04-01

    “Construction provisions: [...] Mandatory April 1, 2026”
    2 more reviewed findings on this topic
    • Adopted (with conditions) — Oregon State Building Code specialty codes administered statewide by the Oregon Building Codes Division.
      “The Building Codes Division adopts, amends, and interprets specialty codes that make up the Oregon State Building Code.”
    • Adopted (with conditions) — Construction, reconstruction, and repair of one- and two-family dwellings and townhouses governed by the Oregon Residential Specialty Code statewide.
      “2023 Oregon Residential Specialty Code (ORSC) [...] Based on 2021 International Residential Code (IRC)”
  • InspectionsRequired

    Work performed under a residential building permit in Gilliam County.

    • Inspections are required as work progresses and vary with the project's scope.
    • The permit holder must notify the building official when work is ready for inspection and provide access and means for inspection.
    • Work may not proceed beyond each successive inspection point without building-official approval.
    • Final inspection occurs after all work required by the building permit is completed.
    “Construction or work for which a permit is required shall be subject to inspection by the building official and such construction or work shall remain accessible and exposed for inspection purposes until approved.”
  • Certificate of occupancyRequired

    Occupancy of a new residential dwelling or townhouse in Gilliam County.

    • Before occupancy, the building official must issue a certificate of occupancy unless a temporary certificate of occupancy is issued.
    • Before issuance, the general contractor or owner issued the structural permit must provide contact and relevant license information for the general, electrical, HVAC, and plumbing contractors that performed work.
    • The certificate may be revoked in writing when the dwelling or townhouse violates applicable law posing a threat to health and safety.
    • Under R110.1, certificates are not required for work exempt from permits under Section R105.2 or for accessory buildings or structures.
    “Prior to occupancy of a new residential dwelling or townhouse the building official must issue a certificate of occupancy in the form and format established by the Division, unless a temporary certificate of occupancy is issued by the building official.”
  • Zoning districtsPublished (with conditions)

    Statewide Oregon zoning data published by the Department of Land Conservation and Development; the data represents local zoning and does not itself replace local zoning ordinances or maps.

    • The source identifies the dataset as Statewide Zoning - 2023.
    • The source provides downloads through GEOHub and a GIS service.
    • Local governments remain the relevant authorities for parcel-level zoning determinations and ordinance administration.

    dataset year: 2023

    “Statewide Zoning - 2023 Downloads available from GEOHub Service”
  • Minimum lot sizeSpecified

    Lots or parcels in Oregon resource-land zones covered by ORS 215.780: exclusive farm use land and designated forestland.

    • The stated standards apply except as provided in ORS 215.780(2).
    • A county may adopt a lower minimum lot or parcel size in specified circumstances if it demonstrates compliance to the Land Conservation and Development Commission or satisfies one of the statutory exceptions.
    • The statute states that a county with an acknowledged smaller minimum lot or parcel size described in ORS 215.780(5) need not comply with subsection (2).

    minimum lot or parcel size for exclusive farm use land not designated rangeland: >= 80 acres (Subject to ORS 215.780(2) and (5).) · minimum lot or parcel size for exclusive farm use land designated rangeland: >= 160 acres (Subject to ORS 215.780(2) and (5).) · minimum lot or parcel size for designated forestland: >= 80 acres (Subject to ORS 215.780(2) and (5).)

    “Except as provided in subsection (2) of this section, the following minimum lot or parcel sizes apply to all counties: (a) For land zoned for exclusive farm use and not designated rangeland, at least 80 acres; (b) For land zoned for exclusive farm use and designated rangeland, at least 160 acres; and (c) For land designated forestland, at least 80 acres.”
  • Living in an RVLimited

    One residential-use recreational vehicle on a lot or parcel in an Oregon rural area, when a county elects to allow the use under ORS 215.490.

    • The property must not be within an urban reserve.
    • An owner-occupied single-unit dwelling must be sited on the property as the owner's primary residence.
    • There must be no other dwelling units on the property, and no portion of the single-unit dwelling may be rented as a residential tenancy.
    • The recreational vehicle space or vehicle may not be used for vacation occupancy or other short-term uses.
    • The recreational vehicle must be owned or leased by the tenant.
    • The property owner must provide essential services.
    • A county may require registration, a written residential rental agreement, payment limits, and reasonable appearance, repair, inspection, or siting standards.
    “A county may allow an owner of a lot or parcel in a rural area to site on the property one recreational vehicle”
    One more reviewed finding on this topic
    • Limited — Residential occupancy of a recreational vehicle in Oregon when the vehicle is allowed under ORS 215.490, located in a manufactured dwelling park, mobile home park, or recreational vehicle park and lawfully connected to required services, or placed on a lot with a dwelling made uninhabitable by a natural disaster.
      “A state agency or local government may not prohibit the placement or occupancy of a recreational vehicle”
  • Manufactured homesAllowed (with conditions)

    Occupancy of a manufactured dwelling on private land in Oregon with the landowner's consent.

    • The lot, tract, or parcel must have adequate area for safe, approved water supply and sewage disposal facilities.
    • The occupancy must not conflict with ORS 446.310(9).
    • The person must comply with all applicable state or local sanitation, water, plumbing, electrical, and sewerage-installation standards.
    “A person may occupy a manufactured dwelling or a camping vehicle on private land with the consent of the owner”
  • Accessory dwellingsLimited

    Accessory dwelling units in areas within an urban growth boundary zoned for detached single-unit dwellings in a city with population greater than 2,500 or a county with population greater than 15,000.

    • The local government must allow at least one accessory dwelling unit for each detached single-unit dwelling.
    • Local regulations may address siting and design but may not include owner-occupancy requirements for the primary or accessory structure or requirements to construct additional off-street parking.
    • Local governments may regulate vacation occupancies to require owner-occupancy or off-street parking.

    city population threshold: > 2500 persons · county population threshold: > 15000 persons · minimum ADUs per detached single-unit dwelling: >= 1 unit

    “A city with a population greater than 2,500 or a county with a population greater than 15,000 shall allow”
  • Off-grid sanitationLimited

    Use of composting toilets and related graywater systems in Oregon.

    • A composting toilet does not eliminate all household water; plumbing fixtures still need connection to an approved septic system.
    • If used with a graywater reuse system, both the graywater reuse system and septic system require a DEQ permit.
    • The graywater reuse system must be offline during wet-weather months or when discharges could create a public nuisance.
    • Material removed from a composting toilet must be buried under 12 inches of soil.
    • Buildings within a sewer district still need a sewer connection.

    burial depth for removed composting-toilet material: 12 inches · maximum reduced drainfield capacity mentioned by DEQ: two-thirds (The source says the drainfield may be approved for a smaller capacity, as much as two-thirds the size.)

    “Composting toilets don't eliminate all water generated in a home and therefore you will need to be hooked up to an approved wastewater treatment system.”
  • Well permitLimited

    Construction, alteration, conversion, or abandonment of water supply wells in Gilliam County under Oregon statewide rules.

    • A landowner permit, permit fee, and bond or irrevocable letter of credit are required when the well work is performed by a landowner.
    • The landowner permit is not required under this source when the landowner is a licensed and bonded Water Supply Well Constructor.
    • The permit and bond must be obtained before beginning work.
    • The source lists a $10,000 bond and a $550 permit fee.
    • A landowner permit expires six months after issuance; a water well report is due within 30 days of permit expiration or well completion, whichever occurs first.
    • A separate water-right permit or license may be required for water use, subject to statutory exemptions.

    bond: 10000 USD · permit fee: 550 USD · landowner permit duration: 6 months

    “The Water Resources Commission requires a permit, permit fee, and bond or irrevocable letter of credit, for each water supply well constructed, altered, converted, or abandoned by a landowner, unless the landowner is a licensed and bonded Water Supply Well Constructor. The landowner permit and bond shall be obtained prior to beginning work on a well.”
  • Mandatory utility hookupSewer (with conditions)

    A building located within an Oregon sewer district, including a building using a composting toilet.

    • The source specifically addresses buildings within a sewer district.
    • A composting toilet does not eliminate the sewer-connection requirement.
    “What if my building is within a sewer district? Your building will still need a sewer connection.”
  • Agricultural exemptionAvailable (with conditions)

    Qualifying agricultural buildings, agricultural grading, equine facilities and dog-training facilities under Oregon structural-code law.

    • The exemption is only from the Oregon Structural Specialty Code.
    • Electrical, plumbing and mechanical work remains subject to permits and the applicable specialty codes.
    • An agricultural building must be located on a farm or forest operation and used for the statutory agricultural, forestry, horticultural, animal-husbandry or related purposes.
    • An agricultural building does not include a dwelling; a structure used for a purpose other than growing plants in which 10 or more persons are present at any one time; a structure regulated by the State Fire Marshal; a structure used by the public; or a structure subject to the National Flood Insurance Act provisions identified in ORS 455.315.
    • Incorporated cities may regulate agricultural buildings, equine facilities and dog-training facilities within their boundaries.
    • Additional uses in an agricultural building must be incidental and accessory, personal to the farm owner and immediate family or household, and pose no greater hazard than the listed agricultural uses.

    maximum persons present for qualifying non-growing-plants agricultural structure: < 10 persons (Structures with 10 or more persons present at one time are excluded.)

    “The provisions of this chapter do not authorize the application of a state structural specialty code to any agricultural building, agricultural grading, equine facility or dog training facility.”
  • Subdividing landRegulated (with conditions)

    Subdivisions and partitions in Oregon subject to review under ORS 92.044.

    • Before a plat may be made and recorded, the applicant must submit a written application to the city or county having jurisdiction under ORS 92.042.
    • The application must include a tentative plan showing the general design.
    • The tentative plan must be approved before the plat may be considered for approval.
    • Cities and counties must adopt standards and procedures governing submission and approval, including requirements addressing utilities, streets, minimum lot sizes, safety, light and air, overcrowding, transportation, water, sewerage, drainage, education, recreation and other needs.
    • Applicable local zoning ordinances and regulations remain part of plat approval criteria.

    tentative-plan approval before plat consideration: true (Applies to subdivisions or partitions subject to review under ORS 92.044.) · local standards and procedures: required by city or county ordinance or regulation (Jurisdiction is determined under ORS 92.042.)

    “Before a plat of any subdivision or partition subject to review under ORS 92.044 may be made and recorded, the person proposing the subdivision or partition or authorized agent or representative of the person shall make an application in writing to the county or city having jurisdiction under ORS 92.042 for approval of the proposed subdivision or partition in accordance with procedures established by the applicable ordinance or regulation adopted under ORS 92.044.”
  • Permit feesVariable (with conditions)

    Oregon state building-code permit fees and fee methodologies, including residential and commercial electrical, plumbing, mechanical, and structural work.

    • Residential electrical new-construction fees are calculated by square footage or, for alterations and repairs, by services, feeders, and branch circuits.
    • Residential plumbing new-construction fees are based on kitchens and bathrooms; alteration and repair fees are based on fixtures.
    • Residential mechanical fees are calculated per appliance or equipment.
    • Residential structural new-construction fees use the ICC Valuation Table current as of April 1 of each year; alteration and repair fees use fair market value as determined by the building official.
    • Commercial plumbing fees are based on fixtures; commercial mechanical fees use equipment valuation and installation costs; commercial electrical fees use services, feeders, and branch circuits.
    • Commercial structural new-construction valuation is the greater of the ICC Valuation Table current as of April 1 of each year or the applicant's stated value; otherwise the building official determines valuation when the construction or occupancy type does not fit the table.
    • Local fee schedules and additional departmental fees may also apply.

    residential structural valuation table date: April 1 of each year · commercial structural valuation: greater of ICC Valuation Table or applicant-stated value (when construction is new/addition) · alteration or repair valuation: fair market value determined by building official (residential structural work)

    “Fees calculated per appliance/equipment. [...] Fees based on fair market value as determined by the building official.”
  • county zoning authorityGeneral

    Oregon counties adopting and revising comprehensive plans, zoning, subdivision, and other land-use ordinances applicable to county land, including unincorporated areas.

    • The statutory text states an exception for ORS 527.722.
    • Plans and related ordinances may be adopted and revised part by part or by geographic area.
    • Zoning, subdivision, and other ordinances or regulations must be designed to implement the adopted county comprehensive plan.
    • Before a county zoning ordinance has legal effect, the governing body or planning commission must conduct one or more public hearings and publish 10 days' advance public notice; additional notice requirements apply to certain zone changes under ORS 215.223.
    “Except as provided in ORS 527.722, the county governing body shall adopt and may from time to time revise a comprehensive plan and zoning, subdivision and other ordinances applicable to all of the land in the county. The plan and related ordinances may be adopted and revised part by part or by geographic area.”
  • county building authorityGeneral

    Oregon counties administering and enforcing building inspection programs, including issuance and enforcement of building permits for residential construction in areas outside incorporated cities.

    • A county building inspection program is subject to the state building code and the statutory building-inspection-program framework.
    • If a county does not notify the director, or notifies the director that it will not administer and enforce a building inspection program, the director must arrange administration and enforcement through a municipality, other person, state employees, or state agencies; permit and other fees arising therefrom are paid into the Consumer and Business Services Fund.
    • A building inspection program is administered for four-year periods under ORS 455.150; the governing body must provide required notices to the Director of the Department of Consumer and Business Services.
    • The program must specify cooperation with the State Fire Marshal or designee and how a uniform fire code will be considered in design and construction review.
    • The cited archive is the 2015 Oregon Revised Statutes edition; the current official ORS 455 page was identified but returned a 403 error during retrieval.
    “If a city does not notify the director, or notifies the director that it will not administer the building inspection program, the county or counties in which the city is located shall administer and enforce the county program within the city in the same manner as the program is administered and enforced outside the city, except as provided by subsection (6) of this section.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission — ask the county directly.

  • Minimum dwelling size — Minimum dwelling size in unincorporated Gilliam County.
  • Tiny homes — Tiny-home occupancy on land subject to Gilliam County zoning.

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.

Water rights & wells in Gilliam County

Whether a new home can legally get its own water here — the sub-state groundwater regime, from Oregon’s water agency.

Over-appropriated / declining

The aquifer here is over-appropriated and declining. A domestic well is usually still permit-exempt, but long-term supply is a genuine risk.

Household wellExempt — no permit or water right

Single or group domestic groundwater use up to 15,000 gpd is exempt from permitting, but the exemption can be limited inside designated Critical Groundwater Areas.

Limit: 15,000 gpd domestic (plus stockwater and ≤0.5 acre lawn/garden) under ORS 537.545

Oregon Water Resources Department — Exempt Water Uses ↗

Prior-appropriation state (first in time, first in right). Groundwater rules change and basin boundaries follow the aquifer, not the county line — confirm current well and appropriation rules with the Oregon state water agency before you buy or drill.Groundwater governance as of Jul 2026, cited to each administering agency.

Living off-grid in Gilliam County, Oregon

Is Gilliam County a good place to live off-grid or homestead?

Gilliam County scores 36/100 on the Bolthole Index, a marginal county profile. Its strengths: deep seclusion — about 1,111 people within 15 miles and manageable long-term carry cost. Watch-outs: weak self-sufficiency basics: only 11.4″ of rain a year, in severe drought 22.1% of years and elevated current hazard exposure.

Do you need a building permit in Gilliam County, Oregon?

Gilliam County generally requires a residential building permit, and it enforces county zoning. Onsite septic is permitted by Umatilla County Public Health (onsite/subsurface program serving Gilliam County). Owner-builders may act as their own contractor to build their home. These answers are quoted from official sources and independently re-checked. Rules change and cities within the county differ — always confirm with the county before you buy or build.

Can you live in an RV or tiny home on your land in Gilliam County?

Living in an RV on your own land in Gilliam County is limited to specific cases: Statewide rule. One residential-use recreational vehicle on a lot or parcel in an Oregon rural area, when a county elects to allow the use under ORS 215.490. The property must not be within an urban reserve. An owner-occupied single-unit dwelling must be sited on the property as the owner's primary residence. Confirm with the county before relying on it.

How much does land cost in Gilliam County, Oregon?

Land in Gilliam County runs about $1,338 per acre, based on the latest county data.

What is the water situation in Gilliam County?

Gilliam County gets about 11.4" of rain a year, with severe drought in roughly 22.1% of years. On water rights, Gilliam County lies in the Ella Butte Groundwater-Limited Area — Classified 1990 over Columbia River Basalt (151 sq mi); 'exempt uses only.' Exempt domestic wells allowed..

How remote is Gilliam County?

A typical private-land location has about 1,111 people within 15 miles and 1,050,539 within 100 miles. These radius catchments are the published fallback where road routing is unavailable.

Off-grid gear

Going off-grid in Gilliam County means bringing your own water and power. The kit we’d start with:

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How Gilliam compares in Oregon

Compare side-by-side →See all 36 Oregon counties ranked →