Vancouver sits on the Columbia, with a clear view of Mount Hood on a good day. It’s the fourth-largest city in Washington. For a factory in Battle Ground, that means site visits, delivery, and punch-list work are a local drive.
What matters more for your project is a line on a map. The City of Vancouver and unincorporated Clark County are different reviewers. A Fruit Valley address and a Salmon Creek address can look like the same metro and still file in different systems.
Wolf sets ADUs and cottages in Vancouver and the close-in neighborhoods around it, and we file through the city’s ePlans process regularly.
City of Vancouver or Clark County first
Pull the parcel on Clark County GIS before you sketch a backyard. If the lot is inside city limits, the city’s Community and Economic Development and building staff review it. If it isn’t, you’re in county land use and building, and you may permit through the county instead. Getting that wrong can cost a month.
People say “Vancouver” when they mean Hazel Dell, Minnehaha, Felida, or a five-acre parcel off NE 72nd. Those are often Clark County, even when the mailing city is Vancouver. Salmon Creek and Felida straddle the city/county line more often than people expect.
City or county decides whether the city’s two-ADU, 1,000 sq ft rules apply or the county’s urban or rural path does. It also sets which online system takes the application and which utility review comes first. On a rural parcel, it decides whether a detached unit is allowed at all. That’s the first thing we check on every Vancouver evaluation.
Washington law allows two ADUs on qualifying lots in urban growth areas (UGAs). A UGA is the area around a city that’s planned for urban growth. Lot coverage, utility capacity, and any critical areas (wetlands, steep slopes, and similar protected ground) still limit what fits. Our Washington ADU laws guide covers the statute.
Inside Vancouver city limits, the city’s ADU rules reflect those state requirements. Our Vancouver ADU rules page has the full list. The main points:
- Up to two ADUs with the primary dwelling.
- 1,000 sq ft maximum for the ADU classification. The building code sets minimum dwelling requirements, and larger dwellings need a different classification.
- No owner-occupancy requirement.
- Development standards depend on the building type of the principal dwelling, along with the zoning and property limits. The city publishes no minimum vehicle parking requirement for ADUs.
- The updated zoning took effect July 31, 2026. Use the city’s current ADU guidance for the requirements that apply.
Vancouver now sends projects that create an ADU, including conversions and additions, to its New Housing or Dwelling Unit application guidance. Complete the Request for Utility Services review unless an exemption applies. A separate modular checklist lists the construction plans, foundation plan, and supporting documents a modular home needs.
Unincorporated urban lots in the UGA follow the county urban ADU path. Rural ADUs (RADUs) under Clark County Code 40.260.022 follow an attached-unit path. That means one RADU within or added to the primary home, usually limited to 1,500 sq ft of interior area, with a basement exception. The urban two-ADU mandate doesn’t create a detached rural allowance. Septic capacity also needs review.
How Vancouver takes a permit
In our experience, city staff run a consistent ADU path. Technicians ask focused questions and run a mostly paperless online process. That matches how we file.
Here’s the city path:
- Confirm the project is allowed in this zone, using GIS and the current ADU handout.
- Gather digital documents: city application forms, a plot plan with existing and proposed structures, and the builder’s engineered plan set.
- Finish the required utility review, then follow the city’s current online permit instructions. Choose the new-dwelling application when you’re creating an ADU, and include the modular checklist documents where they apply. Keep copies of what you submitted and the confirmation.
- Go through review. A complete file has typically taken us about 6–8 weeks. Tree information, critical-area reviews, utility comments, and corrections can add review cycles. Keep approved drawings on site for inspectors, and coordinate any revisions before construction moves ahead.
We handle engineering and permitting support in-house. You aren’t coordinating a designer in Portland, an engineer in Seattle, and a setter who has never been on Fourth Plain.
Lots we see in Vancouver
Vancouver backyards vary a lot by neighborhood. Westside and Fourth Plain corridors can be tight, with older houses, narrow side yards, and parking that competes with a crane.
On older westside blocks, houses often sit close to the property line. That shrinks where a detached unit can go. It happens even though state law says ADU setbacks (the required distance from the property line) can’t be stricter than the principal dwelling’s.
Cascade Park, Fisher’s Landing, and east-city plats are often wider. They still bring HOA (homeowners association), tree, and drainage questions. HOA plats east of I-205 can add design review that the city’s ADU handout never mentions. Pull your CC&Rs (the HOA’s recorded rules) early.
Fruit Valley and some north-city pockets sit closer to industrial areas or rail. That can mean noise, truck traffic, and easements to plan around.
Soils along the river bottoms and some low areas raise floodplain and geotechnical (soil engineering) questions. Parcels near the Columbia and low-lying lots need a flood-map check before anyone orders a module. Base flood elevation comes from the flood map and a surveyor. If you know the parcel is in a flood overlay, tell us when you ask for the evaluation.
Climate, soils, and the set
Southwest Washington is wet from fall through spring, which is why we build the house indoors. On the lot, soggy silts and a high water table affect excavation and erosion control. They also decide whether a crawl space or a slab is the right foundation.
Set day, when we place the home on its foundation, is easiest in summer. A winter set means more erosion control and cleanup.
Delivery from Battle Ground is short, but the home still has to fit the street and a 20-foot side yard. We measure overhead lines and turnaround room, and we note whether the home is a one-piece K or a larger L. Overhead power lines, firs, and a 24-foot-wide paved street with parking on both sides are the usual delivery problems. A one-piece home from the factory is a morning’s work when the path is clear. A two-piece home on a dead-end street while school is in session needs a separate traffic plan.
Utilities: city water vs well country
Most in-city Vancouver lots are on city water and sewer. That still leaves lateral length (how far the service lines run to the main), cleanout location, and electrical service. The question there is whether the service can pick up a second dwelling without a panel upgrade. Each of those shows up in the site-work price.
Cross the UGA line and you’re often on well and septic. On those rural lots, the RADU rules and the septic design usually decide the project well before the choice of model does.
Models that show up here
These are modular homes. They aren’t built to HUD (the federal standard for manufactured homes).
- Model K (~432 sq ft, one bedroom) is the usual one-bedroom for a guest, a parent, or a renter. At 12 feet wide, it’s the easiest fit for a narrow westside side yard.
- Model E and Model F (~616 sq ft) when you need two bedrooms.
- Model L when the zone and coverage allow a larger cottage.
- Model I when someone wants a small primary-scale home and the lot has room beyond a typical infill backyard.
We’ve set Model E, F, J, and I homes on Vancouver streets. Owners use them as rentals, parent dwellings, and guest cottages. See Vancouver-area projects in our case studies, including work in Vancouver and nearby Salmon Creek, Fargher Lake, and Brush Prairie.
Uses: family, rental, or guest cottage
“Tiny home,” “mother-in-law unit,” and “guest house” often describe the same building. If it’s a dwelling with a kitchen and bath, Vancouver will treat it as a dwelling.
Vancouver owners build for parents, for adult children moving back, for a quiet office that can host a guest, and for long-term rentals. Washington bans owner-occupancy requirements inside UGAs, so a rental ADU is an option for a lot of owners. Short-term rental rules are still local and separate from the ADU permit. Check them before you plan on nightly rental income.
Cost and time
The model sets the starting home price. Trenching, electrical capacity, foundation work, and other property conditions set the rest of the total project cost. The Model K starts at $85,500 for the home itself. Permitting, delivery, installation, and site work are listed separately in your proposal.
Start with a free property evaluation. Once the site details are worked out, we’ll give you a complete proposal. See our Washington ADU cost guide for the full picture.
Close to the factory
Battle Ground is up I-205 and SR-503 from most of Vancouver. We walk lots, set homes, and come back for warranty work without an overnight trip. For most Vancouver projects, distance is the easy part. The jurisdiction and the site conditions take more work.
After the set come inspections, a walk-through, the punch list, keys, and the warranty packet. Because the factory is nearby, a missing piece of trim is a quick trip instead of a two-week wait for parts. Punch-list visits are ordinary field work.
Nearby cities
Washougal and Camas are close and have their own city halls. So do Ridgefield and Battle Ground, our factory town, to the north. A lot in one of those cities follows that city’s code. If you’re not sure which side of the line you’re on, Clark County GIS shows the city limits.
What to send us
If you already have a survey or a prior permit on Clark GIS, send it. If you only have an address and a rough idea of where the home would go, that’s enough to start.
Photos help us judge delivery before a site visit. Send the backyard, the side yard the home would pass through, and the street out front. If the lot is in an HOA, the CC&Rs tell us early whether design review applies. If you know your electrical panel size, or that you’re on septic, include that too. If the lot won’t work, we’ll tell you early, before you commit to a floor plan that can’t be delivered.
Send the address for a free property evaluation. We’ll match a model to your zone and to the side yard it has to pass through.
