Bolthole Index

Union County, Oregon

Building permits, zoning and septic rules in La Grande, Oregon

La Grande, Oregon requires building permits for applicable construction, with applications and inspections handled by the City of La Grande Building Division.12 La Grande applies its own zoning and development standards; septic service stays with Harney County Environmental Health under Union County’s onsite program.34 An ADU requires city land-use approval and building permits, and private-property RV camping is restricted.56

At a glance

Building permit
Required; City of La Grande Building Division1
Zoning
City zoning and development standards apply3
Septic
Harney County Environmental Health handles onsite systems4
RV living
Private-property camping is restricted; ask city Planning about exceptions6
Accessory dwelling
Allowed in residential zones with land-use approval and building permits5
Detached ADU size
At most 800 square feet and smaller than the primary dwelling5
Owner-builder
Limited structural-code exemption; building permit still required7

Who to call

Building permits

City of La Grande/Union County Building Division

Building permit applications for La Grande and Union County

541-962-1360

[email protected]

P.O. Box 670 - 1000 Adams Avenue La Grande, OR 97850

Planning & zoning

City of La Grande Planning Division

City land-use review, zoning and ADU approvals

541-962-1307

City Hall 1000 Adams Avenue La Grande OR 97850

Floodplain permits

City of La Grande Planning Division — Floodplain

City floodplain development application and review

(541) 962-1307

1000 Adams Avenue, P.O. Box 670 La Grande, OR 97850

Septic permits

Harney County Environmental Health Program

Septic application intake, inquiries, record searches, fees, inspections and permit issuance for Union County

541-573-2761

[email protected]

Online permits →

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 La Grande means bringing your own water and power. The kit we’d start with:

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Do you need a building permit in La Grande, OR?

La Grande requires building permits for applicable construction, and construction may begin once the Building Division issues the building permit.1 Oregon’s Residential Specialty Code governs construction, reconstruction and repair of single-family homes, duplexes and townhouses in La Grande.8

An Oregon owner-builder exemption covers ceiling heights, room sizes and specified temperature requirements for qualifying owner-built dwellings; a building permit must still be issued.7 The owner must intend to occupy the home, build the structural components personally or with unpaid help from friends and relatives, and meet the recorded-ownership and prior-use conditions.7

Who issues building permits in La Grande, and how do you apply?

Contact the City of La Grande/Union County Building Division at 541-962-1360 or [email protected]; the building application lists P.O. Box 670 - 1000 Adams Avenue La Grande, OR 97850.9 La Grande’s building-permit process includes application, plan review, permit issuance and inspections.2

La Grande publishes a joint city/county fee methodology covering building permits, plan review and other inspection-related charges; ask the Building Division for the amount applicable to your project.10 The city’s building application says building permits expire if work does not start within 180 days of issuance or is suspended for 180 days, so discuss scheduling before applying.9

Does La Grande have zoning, lot-size rules and setbacks?

La Grande has city zoning districts and development standards, including a Low Density Residential district intended for single-family residences and accessory uses.3 City Planning oversees residential, commercial and industrial land-use standards within La Grande and its Urban Growth Boundary.11

In La Grande’s Low Density Residential district, an approved master plan governs development patterns, parcel sizes, subdivisions, partitions and lot-line adjustments for existing lots of 0.5 acre or more.12 That threshold concerns master planning, rather than establishing a universal minimum lot size.12 We could not confirm numeric city setbacks, lot coverage or building-height limits; ask La Grande Planning at 541-962-1307 for the standards for your parcel’s district.11

How do septic permits work inside La Grande?

Harney County Environmental Health provides onsite septic service for Union County, including incorporated La Grande, under the county’s delegated onsite program.4 Septic installation, alteration and repair require a septic permit; site evaluation approval is followed by a separate construction-installation application, and the issued permit is valid for 1 year.13

For new septic construction or repairs inside La Grande city limits or the Urban Growth Boundary, Harney County requires a signed Land Use Compatibility Statement and Sewer Availability Form.14 The municipality determines whether a sewer connection is physically practical, legally available and supported by sewer capacity.15 Send septic questions and record requests to Harney County Environmental Health at [email protected] or 541-573-2761; applications can be submitted by email or Oregon E-Permitting.16

Can you live in an RV or tiny home in La Grande?

La Grande restricts private-property camping in RVs and portable shelters, with specified guest, construction and bona fide-event exceptions; ask city Planning to confirm which exception fits your proposed stay.6 We could not confirm the exact private-property occupancy limits here, so obtain the applicable conditions from La Grande Planning before relying on an RV as construction housing.11

For a small permanent home beside an existing dwelling, La Grande allows ADUs in residential zones subject to development standards, land-use approval and city building permits.5 A detached ADU may be no larger than 800 square feet and must be smaller than the primary home’s living area.5 La Grande’s Planning Division says park models are temporary structures like RVs and do not meet building-code compliance for permanent housing.11

Building a home in La Grande: what are the steps in order?

  1. Start with La Grande Planning to identify the parcel’s zoning and applicable land-use standards.11
  2. For onsite wastewater, contact Harney County Environmental Health about site evaluation and septic approval, and arrange the required city-limits Land Use Compatibility Statement and Sewer Availability Form.1714
  3. Submit the building application and plans to La Grande’s Building Division, complete plan review, and wait for building-permit issuance before construction.21
  4. Coordinate construction inspections with the Building Division.2

Ask the Building Division to confirm the occupancy documentation for your project; we could not confirm a city-specific certificate-of-occupancy requirement.9

What should you check before buying land in La Grande?

For land outside city limits, use the Union County guide: county zoning applies to unincorporated Union County, while city Planning handles La Grande’s land-use standards.1811 For a city parcel with flood concerns, ask La Grande Planning about the city’s floodplain development application.19 We could not confirm city driveway-access requirements or a parcel-specific mandatory public-water connection rule; raise both with city Planning before buying.11

If you plan to construct a water-supply well yourself in La Grande, Oregon requires a landowner permit, fee and bond before work unless you are a licensed and bonded Water Supply Well Constructor.20 A composting toilet does not eliminate the need for an approved wastewater treatment system under Oregon’s sanitation rules.21

Watch-outs

  • A La Grande park-model unit does not qualify as a permanent-housing ADU under the city Planning Division’s guidance.11
  • Septic projects inside La Grande need sewer-availability documentation; do not assume a vacant lot can use septic simply because a neighboring parcel does.14
  • We could not confirm La Grande’s numeric setbacks, lot coverage or height standards; obtain district-specific answers from city Planning before choosing a house plan.11

Sources

  1. Building Division | La Grande, OR (La Grande), quoted and re-checked
  2. Building Division | La Grande, OR (La Grande), quoted and re-checked
  3. Sec. 103-28. Low Density Residential (R-1) (La Grande), quoted and re-checked
  4. Union County Ordinance 2025-02 Onsite Wastewater, quoted and re-checked
  5. Community Development - Planning Division | La Grande, OR (La Grande), quoted and re-checked
  6. Sec. 109-57. Parking, occupancy and storage of recreational vehicles and camping (La Grande), quoted and re-checked
  7. 2023 Oregon Residential Specialty Code - ORS 455.320 reprinted (Oregon statewide rule), quoted and re-checked
  8. Residential Structures Code Program (Oregon statewide rule), quoted and re-checked
  9. City of La Grande/Union County Building Division (cityoflagrande.org)
  10. Fee Schedule | La Grande, OR (La Grande), quoted and re-checked
  11. City of La Grande Planning Division (cityoflagrande.org)
  12. library.municode.com (La Grande), quoted and re-checked
  13. Residential Septic Permitting (La Grande), quoted and re-checked
  14. Onsite Sanitation, quoted and re-checked
  15. Onsite Wastewater (Septic) Rules Update, quoted and re-checked
  16. Harney County Environmental Health Program (unioncountyor.gov)
  17. Onsite Septic Program for Union County, quoted and re-checked
  18. Planning Department - Union County, quoted and re-checked
  19. City of La Grande Planning Division — Floodplain (cityoflagrande.org)
  20. Landowner Constructed Wells (Oregon statewide rule), quoted and re-checked
  21. What do I do with the finished material? (Oregon statewide rule), 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.

Answers from the rulebook for La Grande

La Grande’s own rules

  • Building permitRequired

    Construction projects administered by the La Grande Building Division inside city limits.

    • Construction may begin once the permit is issued.
    • Application, plan review, and permit issuance are part of the city process.
    “Our friendly staff will assist you with the process of application, plan review, permit issuance, and help find the answers to your questions. Once a permit is issued, construction may begin and our certified inspection staff will assist you through the inspection process by providing timely services.”
  • Local zoningPresent

    La Grande city land inside city limits.

    • The city code contains adopted zoning districts and land development standards.
    “The purpose of this zone is to establish areas suitable for single family residences and necessary accessory uses. The low density residential zone is intended to implement the comprehensive plan designation of a low density residential land use with a minimum density of four dwelling units per acre.”
  • Camping on your landLimited

    Temporary camping inside La Grande city, including private property and public property.

    • Private-property camping in RVs, tents, bivouacs, tarps, or other portable shelters is restricted by Sec. 109-57 except for specified guest, construction, and bona fide-event exceptions.
    • Public-property camping is separately regulated and the public-property ordinance expressly does not regulate private property.
    • Morgan Lake Park permits overnight camping only in designated sites for a maximum of three consecutive days per calendar month.

    Morgan Lake maximum stay: 3 consecutive days per calendar month (designated sites only)

    “Overnight camping is only allowed in designated sites with a maximum stay of three consecutive days per calendar month.”
  • Accessory dwellingsAllowed (with conditions)

    Accessory dwelling units in La Grande residential zones.

    • ADUs require compliance with applicable zoning and development standards.
    • A detached ADU may be no greater than 800 square feet and must be smaller than the primary dwelling's residential living area.
    • Land-use approval and city building permits are required.
    • No additional parking space is required for an ADU.
    • A detached ADU requires an 18-inch minimum covered porch entry and matching siding and roofing style, materials, and colors.

    detached ADU maximum size: <= 800 square feet (must also be less than the primary dwelling's residential living area) · covered porch entry minimum: >= 18 inches (detached ADU)

    “ADU's (Accessory Dwelling Units) are allowed in the residential zones subject to compliance with applicable zoning and development standards.”
  • Subdividing landRegulated (with conditions)

    Subdivision and partition development inside La Grande city.

    • R-1 standards state that master plans govern development patterns, parcel sizes, subdivisions, partitions, and lot-line adjustments for lots with existing areas of one-half acre or more.

    master-plan threshold: >= 0.5 acre (lots with existing areas of one-half acre or more)

    “For lots with existing areas of one-half acre or more, an approved master plan shall govern development patterns, and parcel sizes, along with subdivision, partitions and lot line adjustments.”
  • Permit feesPublished

    La Grande building permit, plan review, inspection, demolition, temporary occupancy, and permit-extension fees.

    • The city page identifies the schedule as the City of La Grande/Union County 2017 Uniform Fee Methodology.
    • The schedule is described as adopted by both the city and Union County and compliant with Oregon Administrative Rule 918-050.

    fee schedule date: 2017 (The page does not state that 2017 is the effective date.)

    “This 10-page comprehensive schedule from the Building Division covers plan review fees, building permit fees of all kinds, and more.”
  • Permit processPublished

    La Grande building-permit process.

    • The process includes application, plan review, permit issuance, and inspections.
    • The Building Division provides permit technicians and certified inspection staff.
    “The initial step is accomplished through an interactive process beginning when you visit our office and meet with our permit technicians. Our friendly staff will assist you with the process of application, plan review, permit issuance, and help find the answers to your questions.”

Rules another office applies inside La Grande

La Grande does not set these itself; the county, a health district or the state does, and they apply to every address inside its limits.

  • Septic permitRequired

    New, altered, or repaired onsite septic systems inside La Grande city where onsite disposal is used.

    • A separate application for a construction-installation permit is required after site evaluation approval.
    • The permit is valid for one year once issued.

    permit validity: 1 year

    “Septic permits are required to install a new septic system, alter an existing septic system, or repair an existing septic system. An onsite program specialist will review the septic permit application materials and make sure conditions of the site evaluation report and rule requirements are met. Once all rule requirements are satisfied, the septic installation permit will be issued and is valid for one year.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask La Grande or Union County directly.

  • Certificate of occupancy — Certificate-of-occupancy requirements inside La Grande city.
  • Setbacks — Setbacks inside La Grande city, including R-1 and HD districts.
  • Lot coverage — Lot coverage inside La Grande city.
  • Building height — Building height inside La Grande city.
  • Well permit — Private well permitting inside La Grande city.
2 more unanswered
  • Mandatory utility hookup
  • Driveway access

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.

Unanswered questions are usually a sign that La Grande publishes no rule on the point, not that none exists. Union County’s page lists the county offices to call.

← All of Union County: county rules, score and offices