ADU Pass
Eugene
Lane County portion
Also in: No County
ADU Pass helps homeowners in Eugene, Lane County, Oregon navigate the permit paperwork for building an accessory dwelling unit. This area covers 7 ZIP codes.
Map
ADU details
ADU legality: allowed
Permitted ministerially through Eugene's eBuild portal. The city's 13-design Pre-Approved ADU Plans library (incl. the free 'Joel' design) is a core acceleration mechanism unique to Eugene.
Cost scenarios
| Scenario | Sq ft | Permit | Build | Total |
|---|---|---|---|---|
| minimum | 400 | $5,800 | $132,000 | $137,800 |
| 600 | 600 | $9,100 | $234,000 | $243,100 |
| midpoint | 700 | $10,800 | $280,000 | $290,800 |
| 800 | 800 | $12,400 | $332,000 | $344,400 |
Fee breakdown (as of 2026-04)
Permitting process
- Site eligibility check & pre-approved plan selection (~7d)
Confirm lot size, zone (R-1/R-2/etc.), South Hills S2 overlay, Riparian /S5 overlay status via the eMap GIS viewer. Decide between pre-approved plan (e.g. The Joel, The Reach, The Pine) or custom design. - eBuild submittal (~1d)
Submit through the eBuild Citizen Self-Service portal: building permit application, site plan, stamped plans (or the pre-approved drawing set), Title-24-equivalent ORSC energy worksheet, structural calcs. - Concurrent plan review (~28d)
Building Code (BPS), Land Use (zoning), Public Works (utilities), and EWEB (electric) review concurrently. Ridgeline /S2 overlay routes to South Hills planner. - Corrections cycle (~14d)
Resubmit corrections via eBuild. Typical Eugene cycle is 1-2 rounds for pre-approved plans, 2-3 for custom. - Permit issuance & SDC payment (~5d)
Pay building permit, plan check, and SDCs (or sign 10-year SDC financing agreement). Permit issued within 5 business days after payment. - Construction & inspections
Foundation, framing, MEP rough, insulation, drywall, final. Inspections scheduled via eBuild. - Certificate of occupancy (~4d)
Final inspection sign-off; ADU eligible for tenancy.
Viability (permitted uses)
- Long-term rental: yes (EC 9.2750 silent on tenancy form; ORS 90 (Oregon Residential Landlord & Tenant Act) governs) 30+day rental allowed; ADU is fully a rental dwelling unit under Oregon landlord-tenant law.
- Short-term rental: with-restrictions (Eugene Code 9.5450 - Vacation Rentals & Eugene Business License) ADU may serve as STR but loses access to certain housing subsidies and is not eligible for the cluster of state ADU-rental incentives that target long-term tenancy.
- Vacation rental license required
- Transient lodging tax registration required
- Some neighborhoods (e.g. Westside Neighborhood Plan area) impose density caps on whole-unit STRs
- Office rental: no EC 9.2750 limits ADU to dwelling-unit use; commercial office tenancy not permitted in residentially-zoned ADU.
- Home office: yes Home occupation under EC 9.5500 permitted in any dwelling including the ADU; foot-traffic and signage limits apply.
- Studio / workshop: yes Personal artist/musician/maker studio is an allowed accessory residential use.
- Agriculture: with-restrictions (EC 9.5500 - urban agriculture, hen-keeping, beekeeping) Backyard agriculture and limited livestock allowed; ADU itself remains residential dwelling.
- Relative support: yes Family-occupancy of the ADU (multigenerational housing) is the originally-anticipated use case under HB 2001.
Incentives
- Oregon HCSD ADU Grant - Multifamily NOFA — Up to $40,000 income-qualified rehab/conversion (Income-restricted; not always available - check current NOFA)
- Eugene Pre-Approved ADU Plans Library (13 designs incl. free 'Joel') — City-vetted plan set; reduces plan-check fee significantly and eliminates zoning re-design loops. The Joel design is offered free; commercial designs typically $500.
- Eugene 10-Year SDC Financing — Eligible homeowners may finance the ~$7,200 SDC bundle (transportation, stormwater, parks, sewer) over 10 years through the city.
Pre-approved plans Eugene Pre-Approved ADU Plans Library · 13 free designs · 50% plan-review fee waiver · saves ~5 weeks
Contacts
Staff: Land Use / Zoning (Planner on Duty), Building Code Plan Review (Building Permit Services), Public Works Engineering (utilities, ROW, SDCs) (Public Works), Annie Loe (Urban Designer / Pre-Approved ADU Program Lead)
Utilities
- Water: Eugene Water & Electric Board (EWEB) - Water Division · 28d connect · $3,850
- Sewer: City of Eugene Wastewater (treatment via MWMC regional plant) · 18d connect · $2,750
- Electric: Eugene Water & Electric Board (EWEB) - Electric Division · 35d connect · $1,950
- Gas: NW Natural · 30d connect · $1,450
Property values & taxes
Market rent by ADU size
| Sq ft | Rent |
|---|---|
| 400 | $1,280/mo |
| 600 | $1,675/mo |
| 800 | $2,050/mo |
Construction timeline
Realistic total: best 7mo · typical 11mo · worst 17mo
PNW wet season (Nov-Mar) extends framing/dry-in. Eugene's contractor pool is mid-sized; lead times shorter than Portland but longer than Bend.
Modular pathway Oregon BCD Manufactured Structures Program · inspectors are occasional with modular · 14 modular permits (last 24mo)
I-5 access is good; South Hills /S2 narrow streets and steep grades restrict module width on hillside parcels.
Financing
State ADU loans:
- Oregon ADU Loan (when funded by NOFA) (Oregon HCSD) up to $50,000
Insurance impact
Wildfire exposure in South Hills /S2 overlay raises premium ~$700-1100. Flatland west and north Eugene parcels see normal inflation only.
HOA prevalence & preemption
Eugene HOA prevalence is low - mostly a few master-planned developments (Crescent Village, Awbrey Park-style HOAs). State law voids ADU bans in covenants.
Regulatory overlays (5)
- historic-district — East Skinner Butte Historic District (downtown), College Hill Reservoir Historic District, scattered local landmarks · +21d · +6% cost
Historic Review Board review for design changes visible from public ROW; interior conversions typically clear with administrative review. (map) - wui-fire-zone — South Hills /S2 overlay (Hendricks Park, Spencer Butte, Ridgeline Trail neighborhoods) · +14d · +8% cost
Defensible space, ignition-resistant siding within 5 ft, Class A roof. Slope-driven access standards add design cost. (map) - flood-zone — FEMA SFHA Zone AE along Willamette River, Amazon Creek, McKenzie River corridor · +10d · +6% cost
Finished-floor elevation 1 ft above BFE; flood vents on enclosed below-base areas; flood insurance for federally-backed financing. (map) - seismic-retrofit-zone — Cascadia Subduction Zone hazard footprint (regional) · +7d · +3% cost
Seismic Design Category D1 per ASCE 7. Hold-down hardware standard in ORSC 2023; legacy houses without retrofitted cripple walls may need work for ADU loading paths. (map) - other — Riparian /S5 overlay along Willamette, Amazon Creek, Spring Creek; goal-5 fish-and-wildlife buffer · +14d · +5% cost
50-ft riparian buffer typical; ADU placement constrained on creek-adjacent lots. (map)
Technical envelope (climate & building code)
Climate & energy code
Building code
Amendments:
- Eugene Local Building Amendments — Local amendments addressing seismic hold-downs, hillside lateral bracing, and stormwater best management practices.
Contractor market (aggregate)
Legal history (timeline)
Current ordinance: Eugene Code 9.2750 / 9.2751 - Accessory Dwellings Standards, adopted 2018-05-09, last amended 2022-06-13
- 2018-05-09 — Ordinance 20625 - Accessory Dwelling Units, Eugene Code Amendments (city-ordinance)
Comprehensive update aligning EC 9.2750 with the 2017-2018 wave of Oregon ADU statutes (SB 1051 / HB 4079) which struck down certain local ADU barriers.
Effect: Removed owner-occupancy mandate, struck off-street parking requirement, set the 800 sqft / 10%-of-lot ceiling, and codified the side/rear setback regime. Eugene became one of the first mid-size Oregon cities to fully harmonize its ADU code with state preemption. - 2019-08-08 — Oregon HB 2001 effective date (state-law)
Statewide middle-housing legislation imposing ADU and duplex/triplex/fourplex requirements on cities >2,500 inside UGBs.
Effect: Reaffirmed Eugene's existing posture and obligated the city to permit at least one ADU on every detached single-family lot subject to objective design standards. - 2022-06-13 — Ordinance 20659 - ADU Code Refinements (city-ordinance)
Cleanup ordinance addressing front-elevation standards, alley access, and clarifying interior-conversion ADU eligibility in the South Hills /S2 overlay.
Effect: Eliminated several discretionary triggers, allowed ADUs to count toward density credit in middle-housing developments, and aligned setback measurement with HB 2001 implementation rules. - 2023-04-01 — Pre-Approved ADU Plans Library Launch (city-ordinance)
City debuted a curated library of 13 pre-vetted ADU designs from local architects, including 'The Joel' offered free of charge by the city.
Effect: Building permit plan-review fees discounted for participants; eliminated zoning plan-check cycle for sites without overlays. Eugene's library is one of the largest in Oregon and notably includes the free 'Joel' design. - 2024-07-01 — FY2025 SDC Schedule Adjustment (other)
Eugene SDCs (transportation, stormwater, sewer, parks) were reset under the city's annual inflation indexing.
Effect: Aggregate SDC burden on a typical 800 sqft detached ADU rose to ~$7,200 from ~$6,800. SDC financing remained available for up to 10 years through the city.
Known issues (1)
- fee-volatility (since 2024-07) — Annual indexing pushed SDC ~5-6% per year through FY26; budget 7-10% headroom on permit-cost estimates older than six months. (source)
Lane County — county ADU rules and overlays
County ADU ordinance
Lane County, OR (383,000 residents including Eugene) administers a county zoning code for unincorporated territory. Major cities include Eugene (county seat), Springfield, Cottage Grove, Florence, Junction City, Veneta, Creswell.
State-floor overlay: Oregon HB 2001 / SB 1051 preemption.
County regulatory overlays
Lane County administers flood-hazard, and (where mapped) coastal, wildland-fire, historic, and airport overlays that shape ADU project feasibility. The most consistent overlay across the county is FEMA NFIP floodplain regulation; other overlays apply to specific geographies inside the county.
- FEMA NFIP Special Flood Hazard Areas in Lane County — A new ADU in a mapped SFHA must be elevated to or above the Base Flood Elevation; cost impact on the project is often material.
- Coastal / hurricane wind exposure — Confirm design wind speed and exposure category at the building department.
- Wildland-Urban Interface (WUI) hazard areas
- Historic districts and individually-listed historic resources
County permitting (unincorporated parcels)
Lane County issues building permits for parcels in unincorporated territory through its development services / planning department, with separate review tracks for zoning conformance, building-code compliance, on-site sewage where applicable, floodplain compliance, and addressing. Inside incorporated municipalities, city departments handle their own permits; the county's authority is geographically limited to unincorporated territory. An ADU permit application is typically processed as a residential building permit with a zoning verification step against the county's ordinance for the parcel's zoning district.
Oregon state — ADU law and programs
State ADU law
Oregon has the most comprehensive statewide ADU preemption framework in the country after California. House Bill 2001 (2019), codified principally at ORS 197.312(5), requires every Oregon city of more than 2,500 residents inside an urban growth boundary, and every Oregon county with population over 15,000, to allow at least one accessory dwelling unit (interior, attached, or detached) by right for each existing or newly-constructed single-family detached dwelling on residentially-zoned lots. Local jurisdictions may impose 'reasonable regulations' on siting and design but may NOT require owner-occupancy of either the primary or accessory unit and may NOT require additional off-street parking. Senate Bill 458 (2021), codified at ORS 92.031, authorizes 'middle housing land divisions' that allow each unit of a duplex / triplex / quadplex / townhouse / cottage cluster to be partitioned onto its own lot for fee-simple sale via an expedited land-division process; SB 458 does not directly add an ADU mandate but interacts with HB 2001 because an existing ADU can be split off onto its own lot under SB 458's expedited process (although a new ADU cannot be created after a SB 458 division). HB 2001 also separately preempts single-family-only zoning in cities over 25,000 by mandating duplexes statewide (and triplexes, quadplexes, townhouses, and cottage clusters in larger cities), which is the 'middle housing' provision discussed alongside ADUs in DLCD guidance.
- ORS 197.312(5) — Limitation on city and county prohibitions on accessory dwelling units — The codified ADU preemption provision originating in HB 2001 (2019). Requires cities >2,500 within an urban growth boundary and counties >15,000 to allow at least one ADU by right per single-family detached dwelling on residentially-zoned lots. Bars owner-occupancy mandates and additional off-street parking requirements; allows reasonable siting and design regulations.
- ORS 197.758 — Middle housing in lower density residential zones (HB 2001 'middle housing' codification) — Companion to the ADU provision. Mandates that cities >25,000 allow duplexes, triplexes, quadplexes, townhouses, and cottage clusters in residential zones; cities 10,000-25,000 must allow duplexes. Operative January 1, 2020 with municipal compliance deadline July 1, 2021 (cities <25k) or July 1, 2022 (cities >25k).
- ORS 92.031 — Middle housing land divisions (SB 458 (2021)) — Authorizes expedited land divisions that put each middle housing unit on its own lot for fee-simple sale. Applies to middle housing land divisions submitted on or after June 30, 2022. Existing ADUs may be split off via SB 458; new ADUs may not be created after a SB 458 division.
- House Bill 2001 (2019) Enrolled — 80th Oregon Legislative Assembly — Session law text amending ORS 197.312 and creating the middle housing mandate. Effective August 8, 2019; ADU and middle housing provisions operative January 1, 2020 with municipal compliance windows running through 2022.
- Senate Bill 458 (2021) A-Engrossed — 81st Oregon Legislative Assembly — Session law text adding the middle housing land division to ORS Chapter 92. Effective June 23, 2021; operative for applications on or after June 30, 2022.
State housing programs
Oregon's state-level ADU policy infrastructure is concentrated in the Department of Land Conservation and Development (DLCD), which publishes guidance documents for cities and counties implementing ORS 197.312(5) and ORS 197.758, runs the Housing Choice and Middle Housing technical-assistance programs, and audits municipal compliance with HB 2001. Oregon does not currently maintain a statewide pre-approved ADU plan catalog (those exist at the city level, e.g. Portland's pre-approved ADU plans), and there is no statewide impact-fee waiver, no statewide streamlined-review timeline floor beyond the reasonable-regulation requirement of ORS 197.312(5), and no state ADU rebate program.
- DLCD ADU implementation guidance — Statewide guidance to local governments on what 'reasonable regulations' on ADU siting and design under ORS 197.312(5) means in practice. Updated September 2019 to coincide with HB 2001 enactment.
- DLCD Housing Choice / Middle Housing technical assistance — Ongoing TA program that supports cities and counties in updating development regulations to comply with HB 2001 (ADUs and middle housing) and SB 458 (middle housing land divisions).
Federal (United States) — ADU-relevant rules and programs
Federal ADU law
The United States has no federal statute that directly regulates accessory dwelling unit entitlement or design. Land-use authority over ADUs resides with states and local governments under the traditional police power. Federal engagement is limited to financing (Fannie/Freddie/FHA/VA/USDA), flood insurance (FEMA/NFIP), and discretionary housing programs (HUD), which are recorded in sibling sections of this file.
Federal financing programs
Federal housing-finance agencies and GSEs set nationwide underwriting rules that govern whether an ADU can be financed, appraised, and counted toward mortgage qualifying income. The relevant actors are Fannie Mae, Freddie Mac, FHA (HUD), VA, and USDA Rural Development.
Federal tax credits
There is no ADU-specific federal tax credit. ADUs may incidentally qualify for existing federal energy-efficiency and clean-energy tax credits when the ADU construction includes qualifying measures.
Federal housing programs
HUD administers several discretionary programs that can fund ADU-related activity at the grantee's election, but none is an ADU-specific program.
ZIP Codes
- 97401
- 97402
- 97403
- 97404
- 97405
- 97408
- 97455
Post Office
- 255 River Ave, 97404
- 30 E 33rd Ave, 97405
- 50 W 5th Ave, 97401
- 520 Willamette St, 97401
- 91145 N Willamette St, 97408
- 950 Tyinn St, 97402