Research by DoINeedAPermit Research Team · Updated May 2026
The Short Answer
All ADUs in West Linn require a building permit. Oregon state law (ORS 197.303) overrides local zoning restrictions on ADUs, making them by-right in single-family zones with specific conditions — but West Linn's local code adds setback, utility, and design review layers that make the actual approval process more involved than the state default.
West Linn adopted Oregon's mandatory ADU provisions (ORS 197.303), which means you have a state-law right to build an ADU in a single-family zone without a zone change or conditional use permit — a huge advantage over cities in other states. However, West Linn's Design Review Board has jurisdiction over ADU applications in most neighborhoods, adding 4-6 weeks to the timeline and requiring architectural renderings and site plans that meet the city's hillside/tree preservation standards. Unlike Portland (which waived parking for ADUs statewide) and some Willamette Valley cities, West Linn does not blanket-waive off-street parking for ADUs — you need one space if the main house has parking; two if it doesn't. Detached ADUs must satisfy West Linn's minimum rear-setback rule (typically 15 feet from property line, steeper for hillside lots), which eliminates many small urban infill projects. The city requires separate utility meters or approved sub-metering for rental ADUs. Plan on 8-12 weeks from application to permit issuance, plus another 2-4 weeks for design review if triggered by lot size or visibility from a public right-of-way.

What happens if you skip the permit (and you needed one)

West Linn ADU permits — the key details

Oregon Revised Statute 197.303, adopted statewide in 2019, mandates that cities allow one accessory dwelling unit in any single-family residential zone. West Linn codified this in its land-use code, making ADUs (detached, garage conversion, or attached junior ADU) a permitted use without a conditional use permit or zone change. This is a state-level override of local zoning, and it applies even if West Linn's comprehensive plan predates 2019 and doesn't mention ADUs. The catch: ORS 197.303 allows cities to impose 'reasonable local conditions' — and West Linn has exercised that authority. The city's Design Review Board must approve ADUs in the Aesthetic Overlay District (which covers much of the residential area visible from US-43 and along the Willamette riverfront). This adds architectural review to your timeline. The city also enforces a 25-percent floor-area ratio cap on ADU size relative to the main dwelling (e.g., a 4,000-sq-ft main house can have a 1,000-sq-ft ADU, not larger). Detached ADUs must meet the city's standard 15-foot rear setback, but hillside lots (Grade 3 or steeper) require 25+ feet in some overlay districts — these constraints mean many small infill lots cannot legally accommodate a detached ADU.

Utility infrastructure is a major pain point in West Linn, especially for detached ADUs and garage conversions. If you're adding a rental ADU, the city requires separate water and sewer service or a certified sub-meter system that meters utilities separately to the ADU tenant (allowing the landlord to invoice the tenant directly for usage). The Willamette Valley's 12-inch frost depth and volcanic/alluvial soils mean foundation design for detached ADUs must account for seasonal water table fluctuations — many ADU designs in West Linn opt for slab-on-grade with perimeter stem walls to avoid frost-heave issues, but slopes and tree preservation overlay rules sometimes block this. Electrical service is also a bottleneck: if the main house and ADU share a single meter, the city may require you to install a new service entrance and panel or a sub-meter rated for the combined load. Stormwater management is strictly enforced in West Linn because of the city's location in the Willamette River floodplain and the urban-growth boundary; a detached ADU with a footprint over 750 sq ft or any permeable surface disruption may trigger stormwater detention or bioswale requirements, adding $5,000–$15,000 to soft costs.

Owner-occupancy requirements have shifted in West Linn due to state law. ORS 197.303 does not mandate owner-occupancy for the ADU; however, West Linn's local code still contains language requiring the 'property owner' to occupy either the primary dwelling or the ADU. This has been interpreted narrowly by West Linn's Planning Division: if you own the property and live in the main house while renting the ADU, you comply. If you own the property but live in the ADU and rent the main house, you also comply. The city does NOT require you to live on-site as a landlord and owner-occupant. This is more liberal than some Oregon cities (e.g., Eugene) but stricter than Portland's blank waiver. Rental ADUs do require the owner to register as a landlord and comply with Oregon Residential Tenancy Act protections (tenant rights, security deposit limits, notice periods) — these are state-level rules, not West Linn-specific, but they are strictly enforced by tenants and tenant-rights organizations in the Portland metro area.

Parking requirements in West Linn are a common deal-breaker for ADU projects. The city's code does not exempt ADUs from parking requirements; instead, it applies a sliding scale. If the primary dwelling has off-street parking (driveway, garage, designated spot), the ADU requires one additional off-street parking space. If the primary dwelling has NO off-street parking (front-street-facing lot, no garage), the ADU requires TWO off-street parking spaces. This is tougher than Portland, Beaverton, or Lake Oswego, and it eliminates many hillside and small urban lots where you cannot physically fit a second driveway or parking pad. Tandem parking (one car behind another in a single space) is permitted if the lot depth allows it. Some West Linn applicants solve this by converting the garage of the main house to living space and building a detached ADU with a carport or driveway, but this requires careful setback planning and often triggers tree-preservation review.

Design Review Board jurisdiction adds 4-6 weeks to your timeline. If your ADU project is located in an Aesthetic Overlay District (the bulk of West Linn's residential neighborhoods), the Design Review Board reviews architectural drawings, colors, materials, screening, site plan, and grading. The city requires a full set of architectural renderings (elevations, sections, color/material boards) even for modest garage conversions. Some applicants skip this step by proposing a junior ADU (attached to the main house, interior or shared-wall configuration) which may avoid Design Review Board jurisdiction if it shares a wall with the main dwelling — but even then, setback and footprint rules apply. Plan review for detached ADUs is done by the Building Division at intake (15 business days), but any Design Review Board submission adds 30-45 days. Once approved, the building permit itself is issued within 5 business days. Total path to permit issuance: 8-12 weeks for projects without Design Review Board, 12-16 weeks for those requiring it.

Three West Linn accessory dwelling unit (adu) scenarios

Scenario A
Detached ADU on a half-acre lot in Trails Historic District (West Linn), rear infill, owner-occupied
You own a 0.5-acre lot (approximately 100 feet deep, 220 feet wide) on a tree-lined street in the Trails neighborhood, zoned R-10 (single-family, 10,000 sq ft minimum). The main house is 3,500 sq ft, built in 1995. You want to build a detached 900-sq-ft, one-bedroom ADU in the rear corner of the lot, oriented to preserve the two large Douglas firs in the front setback. Your site plan shows 15 feet from the northern property line, 20 feet from the southern line, and 30 feet from the back. This meets West Linn's minimum setbacks (15 feet rear, 10 feet side). The main house has a two-car garage with a driveway; your ADU site plan shows a single parking space (carport) adjacent to the unit, meeting the 1-space requirement. Because the lot is visible from the public right-of-way and is in the Trails Historic District, the Design Review Board must review architectural drawings — you'll hire an architect to produce elevation renderings showing the ADU in Craftsman-style siding (matching the neighborhood vernacular), standing-seam metal roof, and landscape screening with native shrubs. The city's tree-preservation overlay requires a certified arborist report confirming no roots of the two Douglas firs are disturbed. You'll submit a full plan set including foundation details (slab-on-grade with perimeter stem wall, accounting for 12-inch frost depth), electrical one-line diagram showing a new 100-amp sub-panel fed from the main service, and a stormwater management plan (permeable pavers in the parking area, roof runoff directed to a rain garden, total impervious area kept below 1,500 sq ft per code). Your utility provider confirms that existing water and sewer laterals can be extended at a cost of $8,000–$12,000 (trenching, permit, meter set). Timeline: 6 weeks for Design Review Board (two review cycles if requested), 2 weeks for plan corrections, 1 week for permit issuance. Total cost: $4,000–$8,000 in permit fees (impact, plan review, building), $8,000–$12,000 in utilities, $35,000–$55,000 in soft costs (architectural, arborist, engineer, surveyor), construction cost ~$200,000–$280,000 (modular or stick-built, 2024 rates). You qualify as owner-builder if you occupy the main house; if you intend to live in the ADU and rent the main house, you must still own the property. Either way, permit is issued to the property owner, not the occupant.
Permit required | Design Review Board required | 1 parking space required | Separate water/sewer meters required | Tree preservation overlay | 8-12 week timeline | Building permit $1,200–$2,500 | Plan review $800–$1,500 | Impact fee $1,000–$2,500 | Total permits $3,000–$6,500
Scenario B
Garage conversion to junior ADU (attached) on steep hillside lot, Aesthetic Overlay, rental unit
Your property is a 0.35-acre lot on a Grade 4 slope (45+ degrees) in West Linn's hillside overlay, zoned R-7. The main house (1,200 sq ft) sits uphill; the detached two-car garage (600 sq ft) is downslope. You want to convert the garage into a 550-sq-ft junior ADU with a sleeping loft, kitchenette (no separate full kitchen), and bathroom, with a shared entrance from a stairwell that connects the ADU to the main house (or a separate exterior door). Because the ADU is physically attached to the garage structure and will share a utility wall with the main house, it qualifies as a junior ADU under ORS 197.303 and may avoid Design Review Board jurisdiction if the conversion is substantially internal (walls, not exterior facade). However, West Linn's Aesthetic Overlay and hillside code (Grade 4 slope) still require Design Review Board approval of any residential remodel visible from the public right-of-way — your proposed stairs, deck, or new windows may trigger this review. The site plan must show no additional impervious surface (the garage already exists); stormwater runoff from the roof will continue to the existing French drain. Parking: the main house has no garage (you're converting it to an ADU), so the code requires TWO parking spaces for the ADU. Your slope is too steep for a driveway; you propose a stacked parking pad (tandem configuration) at the property's edge, requiring a retaining wall and permitting $8,000–$12,000 in site work. Utilities: the garage currently has no separate electrical service; you'll install a 60-amp sub-panel in the ADU fed from the main house panel. Water and sewer: these will be shared with the main house (sub-metering not required if shared kitchen facilities, but West Linn's code now requires sub-metering for rental ADUs regardless — expect $3,000–$5,000 for separate meters or a certified sub-meter system). As a rental unit, you must register with the city, comply with Oregon Residential Tenancy Act (rent-control-exempt under state law, but tenant-rights restrictions apply), and maintain liability insurance naming the ADU tenant as an additional insured. Timeline: Design Review Board process (if triggered) adds 6-8 weeks; without it, 4-6 weeks. Plan review focuses on hillside grading, retaining walls, and stormwater. Total cost: $2,500–$4,500 in permits (design review, building, grading), $8,000–$12,000 in site work (parking, retaining wall), $3,000–$5,000 in utilities (sub-metering, electrical), $45,000–$75,000 in soft costs (engineer, architect, arborist for slope stability), construction cost ~$100,000–$150,000 (interior conversion, not new envelope). You qualify as owner-builder if you own and occupy the main house; the ADU rental does not disqualify you.
Permit required | Design Review Board likely required | 2 parking spaces required | Sub-meter system required | Hillside/slope overlay review | Retaining wall grading cert required | 10-14 week timeline | Building permit $1,500–$3,000 | Plan review $1,200–$2,000 | Hillside development $800–$1,500 | Total permits $3,500–$6,500
Scenario C
Above-garage junior ADU, urban infill lot near downtown West Linn, owner-occupied
You own a 0.25-acre infill lot (5,000 sq ft total) on a tree-lined block one block from downtown West Linn, zoned R-20 (20,000 sq ft minimum lot, but pre-existing nonconforming). The main house is 2,000 sq ft, 1970 construction, with a single-car garage and narrow driveway. You propose a 600-sq-ft, one-bedroom above-garage junior ADU attached to the garage roof, with its own exterior staircase and entrance. This is a junior ADU (attached structure, shared wall or roof system) rather than detached, which streamlines zoning review. The footprint increases the total impervious surface on the lot from 2,800 sq ft (main house + garage + driveway) to 3,500 sq ft — within West Linn's 50-percent maximum impervious for R-20 zoning. Parking: the main house has one garage space, so the ADU requires one additional off-street space; you'll stripe a second space in the driveway (tandem, side-by-side) which is tight but meets code. Because the lot is in downtown West Linn's Commercial/Residential Transition Zone and within the Aesthetic Overlay, Design Review Board approval is required. You'll submit architectural drawings showing a contemporary infill design that complements the neighborhood's mix of older bungalows and new construction — this is critical because West Linn's Design Review Board scrutinizes above-garage units for bulk, fenestration, and roofline conflicts. Utilities: water and sewer will be extended from the main house's lateral; a separate water meter for the ADU costs $2,000–$3,000. Electrical service is split with a 60-amp sub-panel in the ADU. The site plan includes a rain garden in the rear corner to manage stormwater from the new roof area. The existing two mature street trees (maples, city-designated significant trees) are shown in the site plan with a no-disturbance buffer; a certified arborist confirms root zones are clear. Timeline: Design Review Board review 5-7 weeks (usually one cycle for above-garage units because the constraint is architectural, not grading or site work), plan review 2-3 weeks, permit issuance 5 business days. Total timeline 8-11 weeks. Total cost: $2,800–$5,000 in permits (design review, building), $2,000–$3,000 in utilities (water meter), $20,000–$35,000 in soft costs (architect, designer, surveyor), construction cost ~$120,000–$180,000 (new roof + ADU, 2024 pricing). You occupy the main house; the ADU is owner-occupied (not rented) or available for family. No landlord registration required if owner-occupied.
Permit required | Design Review Board required | 1 additional parking space required | Separate water meter required | Tree preservation compliance | 8-11 week timeline | Building permit $1,200–$2,500 | Plan review $1,000–$1,800 | Aesthetic review $600–$1,200 | Total permits $2,800–$5,500

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Oregon state law vs. West Linn local code: where the ADU right comes from and why local rules still matter

Oregon Revised Statute 197.303, enacted in 2019 and amended in 2023, is a state-mandated housing law that requires all Oregon cities to allow one ADU per lot in any residential zone without a conditional use permit, variance, or zone change. This is a statewide override of local zoning; West Linn cannot zone ADUs out or require a Conditional Use Permit. However, ORS 197.303(4) explicitly allows cities to impose 'reasonable local conditions,' and West Linn has stacked several: Design Review Board approval in Aesthetic Overlay Districts, setback compliance (15 feet rear, 10 feet side for standard lots; 25+ feet for hillside), the 25-percent floor-area ratio cap, off-street parking (1-2 spaces depending on main house parking), and separate utility metering for rentals.

West Linn's interpretation of 'reasonable' is conservative compared to Portland, Eugene, or Salem. Portland waived parking for ADUs city-wide. Eugene has a 'Type 1' ministerial approval process that bypasses Design Review Board for ADUs under 800 sq ft. West Linn treats every ADU as a Design Review Board project if visible from a public right-of-way, which includes nearly all residential lots. This adds 4-8 weeks and $600–$1,500 in fees. For applicants, the key takeaway is: you have a state-law right to build an ADU, but West Linn's local conditions are real, enforceable, and not waivable. Proceeding without Design Review Board approval (e.g., filing a streamlined building-only permit) will result in the permit being denied at intake by the Building Division, and you'll be required to re-submit through Planning.

Separate utility metering is the other West Linn-specific burden. Oregon state law does not require sub-metering for rental ADUs; many Oregon cities allow master-metered ADUs with the owner invoicing the tenant for utilities. West Linn's code (Chapter 56, Table 56.060-5) mandates a 'separate utility service' or 'sub-meter system' for any rental ADU. This means you must either run separate water/sewer/electrical lines from the city mains or install a certified sub-meter system that allows separate metering from a single service entry. Separate lines typically cost $8,000–$15,000 (excavation, meter set, permit); sub-metering costs $3,000–$5,000 (meter hardware, installation, certification) but is only allowable if the meter is certified by an engineer and installed by a licensed contractor. This rule is stricter than state law and reflects West Linn's conservative approach to rental housing.

Detached vs. attached ADUs in West Linn: setbacks, trees, and the parking trap

West Linn's code distinguishes between detached ADUs (freestanding structures, 15-foot rear setback, 10-foot side setback on standard lots) and attached junior ADUs (roof or wall integrated with main dwelling or garage, same setback as primary structure). Detached ADUs are common in West Linn because many lots are large enough to accommodate a rear-corner placement, and the Design Review Board is more forgiving of detached units that are screened by existing vegetation. However, the parking requirement stings detached-ADU projects hardest: if the main house garage is converted or doesn't have off-street parking, the ADU requires TWO parking spaces, and many West Linn lots (especially on slopes or in tree-dense neighborhoods) cannot physically fit two additional parking pads without tree removal or a grading permit.

Attached junior ADUs (above-garage, interior attic conversion, or side-wall addition) avoid some setback flexibility because they must comply with the primary dwelling's setback. However, they sidestep the tree-preservation issue for many lots because the footprint is smaller and the addition is vertical rather than horizontal. Above-garage units are increasingly popular in West Linn because they re-use the garage roof, require minimal additional site grading, and often satisfy parking by re-striping the existing driveway (tandem). The Design Review Board's review of above-garage ADUs focuses on architectural compatibility — bulk, window placement, roof line — rather than site work, so plan-review timelines are shorter (5-7 weeks vs. 8-10 weeks for detached).

The tree-preservation overlay is the hidden killer in West Linn ADU projects, especially for detached rear-yard units. West Linn's code (Chapter 56.500) protects all trees 12 inches or larger in diameter; removal or root disturbance within the dripline requires a certified arborist report and may trigger a variance or Design Review Board condition. Many rear-yard ADU sites have mature trees (Douglas fir, big-leaf maple, Oregon white oak) that block the ADU placement or require expensive work-arounds (suspended foundation, air-spading to expose roots without damage, extended stormwater bioswales). Applicants should hire an arborist at the feasibility stage ($800–$1,500 for a tree assessment) before committing to a detached ADU site. An aborist report is NOT required by code but is practically necessary to demonstrate to the Design Review Board that you've minimized tree impact.

City of West Linn Planning & Building Division
22500 Hilltop Road, West Linn, OR 97068
Phone: (503) 656-7634 | https://www.westlinnoregon.gov/planning-building (online submittal via eTrakit portal at https://westlinn.etrakit.com)
Monday–Friday, 8:00 AM–5:00 PM (closed 12–1 PM for lunch)

Common questions

Do I need to own and occupy the property to build an ADU in West Linn?

West Linn's code requires the property owner to occupy either the primary dwelling or the ADU, but not necessarily both. If you own the property and live in the main house while renting the ADU, you comply. If you own the property and live in the ADU while renting the main house, you also comply. The key is owner-occupancy of at least one unit. You do NOT need to live on-site as a live-in landlord. If the property is owned by a non-occupant investor (LLC, trust, corporate owner), the code is silent, and you should contact the Planning Division for clarification before purchasing. Owner-builder status (allowing you to do your own labor without a contractor license) requires owner-occupancy of the primary dwelling for at least one year after construction.

Is parking really required for rental ADUs in West Linn if the main house has a garage?

Yes. West Linn's code requires one off-street parking space for the ADU if the main house has parking (driveway, garage, or designated spot). If the main house has no off-street parking, the ADU requires TWO spaces. This is not waived for rental units or ADUs in transit-oriented zones. Tandem parking (stacked, one behind the other) is allowed if the lot depth permits. Many applicants work around this by converting the main-house garage to living space (if it meets code), then building the ADU with a separate driveway or carport. This converts the 'no parking on main house' scenario to a 1-space requirement for the ADU, which is often more feasible.

What is a junior ADU in West Linn, and does it bypass Design Review Board?

A junior ADU is an accessory dwelling unit that shares a wall or roof system with the primary dwelling, the garage, or another permitted structure — it's attached rather than detached. ORS 197.303 allows up to one junior ADU in addition to one detached ADU on the same lot (so technically, you could have two ADUs if one is junior/attached and one is detached). West Linn does not exempt junior ADUs from Design Review Board approval if the unit is visible from a public right-of-way, which applies to most residential lots. However, because junior ADUs have smaller footprints and require less site work (no additional grading, parking pad already exists in the driveway), the Design Review Board review is often faster (5-7 weeks vs. 8-10 for detached). Above-garage units, attic conversions, and garage conversions are all junior ADUs.

If my lot is in a flood zone or on a steep slope, are there additional ADU restrictions?

Yes. West Linn's hillside overlay (Grade 3 or steeper) imposes a 25-foot rear setback (instead of 15 feet) and requires geotechnical analysis for grading and foundation design. Lots in the 100-year floodplain (Willamette River FEMA zone) cannot support a detached ADU unless elevated above the base flood elevation per FEMA guidelines; attached ADUs may be permitted if the primary dwelling is already elevated. Stormwater management on slopes and floodplain lots is strictly enforced, and bioswales, rain gardens, or retention facilities add $5,000–$15,000 to soft costs. Slopes over Grade 4 (45+ degrees) are technically buildable but practically constrained by tree preservation, retaining wall permitting, and construction access. Contact West Linn Planning before purchasing a steep or flood-prone lot for ADU feasibility.

Can I convert my detached garage into an ADU without Design Review Board approval?

No. A garage conversion to an ADU is a 'junior ADU' (because it's physically attached to a structure), but West Linn's Design Review Board still has jurisdiction if the lot is in an Aesthetic Overlay District or if the conversion includes exterior modifications (new staircase, windows, door, deck). If your conversion is purely interior (walls, insulation, no visible changes), you might argue ministerial review, but West Linn's Building Division typically routes all ADU garage conversions to Planning for Design Review Board screening. Expect 6-8 weeks for approval. If the garage already has side-yard visibility and mature trees, the Design Review Board will require landscape screening or architectural modifications, adding 2-4 weeks to the timeline.

What is the maximum size of an ADU in West Linn?

West Linn caps ADU size at 25 percent of the primary dwelling's floor area, or 800 sq ft, whichever is smaller. So a 4,000-sq-ft main house can have a 1,000-sq-ft ADU (25 percent), but a 2,000-sq-ft main house is limited to 500 sq ft (25 percent). The 800-sq-ft hard cap ensures even large main houses cannot build ADUs over 800 sq ft. Loft spaces (sleeping lofts, mezzanines) count toward floor area. Junior ADUs (attached, loft-style) may be exempt from this cap if configured as an 'efficiency' (no separate kitchen), but West Linn's code is ambiguous on this point — contact Planning to confirm before designing a large loft ADU.

Do I need separate utility meters for my owner-occupied ADU, or only for rentals?

West Linn's code requires separate utility metering (or a certified sub-meter system) for rental ADUs, not owner-occupied units. If you own the property and occupy one of the two units (main house or ADU), you may share utilities (master meter) and are not required to sub-meter. However, many lenders and insurance companies require sub-metering or separate meters as a condition of financing or coverage, so check with your lender before proceeding. If you plan to rent the ADU in the future, install sub-metering during initial construction; retrofitting is expensive ($5,000–$8,000 vs. $3,000–$5,000 during construction).

How long does it actually take to get an ADU permit in West Linn?

Plan for 8-12 weeks from application to permit issuance if the project avoids Design Review Board, and 12-16 weeks if Design Review Board review is triggered (most projects). Design Review Board review takes 30-45 days (1-2 cycles), plan corrections take 1-2 weeks, and Building Division final review takes 5 business days. Detached ADUs on slopes or in tree-dense areas may require geotechnical reports or arborist studies, adding 2-4 weeks. If the Planning Division rejects the design and requests a redesign, add another 3-4 weeks. Owner-builder status does not speed up the permit timeline, only the contractor-licensing step.

What happens if I proceed with construction before the permit is issued?

West Linn Building Division issues a stop-work order and cites the property owner for unpermitted construction ($300–$1,500 per day per code violation). If discovered mid-construction, the city requires a retroactive permit (not guaranteed) and double permit fees ($3,000–$10,000 additional). If the ADU is fully built without a permit, the city may require demolition or a time-consuming variance process to 'legalize' the structure, costing $15,000–$40,000. Any unpermitted ADU discovered during refinance, sale, or title clearance will require remediation before lenders will fund or buyers will close, and Title companies will flag the lien.

Can I apply for an ADU permit online in West Linn, or do I need to visit City Hall?

West Linn uses an online portal (eTrakit) for permit applications, accessible at https://westlinn.etrakit.com. You can submit plans, applications, and documents electronically. However, for complex projects requiring Design Review Board pre-application consultation or clarification of ADU eligibility, a phone call or in-person visit to the Planning Division (22500 Hilltop Road, (503) 656-7634) is recommended. The Planning Division offers free 30-minute consultations to confirm your lot qualifies for an ADU and to clarify Design Review Board triggers. Plan review feedback is delivered via email (plan corrections, Design Review Board conditions). All communications after initial submittal are electronic.

Nearby cities & related guides

Accessory Dwelling Unit (ADU) Permits in Portland, OR Accessory Dwelling Unit (ADU) Permits in Salem, OR Accessory Dwelling Unit (ADU) Permits in Eugene, OR
Disclaimer: This guide is based on research conducted in May 2026 using publicly available sources. Always verify current accessory dwelling unit (adu) permit requirements with the City of West Linn Building Department before starting your project.

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