Newberg sits on 99W between the Portland metro and McMinnville, with George Fox University in town and Dundee next door. It’s close to Portland, but it isn’t a Portland permit. The City of Newberg is one of Yamhill County’s larger city halls, outside Metro, and it has different rules than McMinnville’s 800-square-foot cap.
Wolf builds in Battle Ground, in Clark County just north of Portland, and delivery runs I-5 / I-205 to 99W. We don’t have a recorded Wolf delivery in Newberg yet, but the city is inside our Washington-and-Oregon turn-key area, and we review lots here the same way we do across the rest of the Valley.
City of Newberg or Yamhill County first
Pull the parcel before you sketch a backyard. If the lot is inside city limits, Newberg Community Development handles it. If it isn’t, county land-use rules apply even when the mail says Newberg. Dundee is a separate incorporated city, and Sherwood is in Washington County. Edges toward Dundee can look rural and still be in the city, or the reverse, so check GIS first.
Oregon cities must allow ADUs, but the local packet still matters. Read the Oregon ADU rules guide and the Yamhill County ADU rules guide.
Inside Newberg, these are the ADU standards we use on evaluations (confirm the current NMC when you file):
- ADUs are outright permitted in R-1, R-2, R-3, RP, I, and AR, and they’re a conditional use in C-2 and C-3. Other zones don’t allow them.
- An ADU may be interior, an addition, or a freestanding accessory building.
- Size: may not exceed 50 percent of the primary unit, up to a maximum of 1,000 square feet.
- Occupancy of the unit follows the Oregon Residential Specialty Code.
- Owner occupancy of the primary or the ADU is not required.
- Site design review: Newberg has listed accessory dwelling units as Type I. Confirm 15.220.020 when you apply.
- The ADU can’t be partitioned off the primary parcel if water and wastewater lines are shared.
- Base-zone development standards still apply.
Unincorporated Yamhill County follows different rules. Rural parcels generally need at least two acres, the ADU has to sit within 100 feet of the existing house, the size cap commonly tops out around 900 square feet, and short-term rental of the ADU isn’t allowed. Resource-zone and wildfire setbacks can apply. Newberg’s 1,000-square-foot cap doesn’t apply on a county lot, and the county’s two-acre rule doesn’t apply on a city lot.
How Newberg handles a permit
Complete Type I files move through review, and incomplete site plans or open utility questions come back with comments. Here’s the path we use:
- Confirm the zone allows an ADU outright, or whether the lot is in C-2 / C-3 conditional-use land. If it’s conditional use, we sort that out before anyone orders a home.
- Draw the plot plan: existing house, proposed cottage, setbacks for that zone, utilities, and a truck path that works on 99W frontage or a residential cul-de-sac.
- Prepare the engineered modular plan set. Wolf homes are modular, built in Battle Ground under Oregon’s BCD prefabricated-structures program, delivered with a state insignia of compliance, and placed on a local foundation. They aren’t HUD (the federal standard for manufactured homes) manufactured homes and they aren’t on wheels.
- Submit to the city (or Yamhill County if unincorporated), including water and wastewater plans and the usual building, electrical, plumbing, and mechanical applications. Site prep is part of the job.
- Complete inspections as called, then get occupancy. Oregon BCD inspects the module in the factory, and Newberg inspects the foundation, placement, connections, and the Type I items. Keep approved drawings on site.
Parking language in older Newberg ADU text has changed over time. Some versions require one additional on-site space, and others require no on-site parking for the ADU. We ask planning which one is current the week we file.
SDCs and fees
The city’s fee schedule has used the same 50 percent / 1,000 square foot definition for ADU system development charges, and it has published a small-unit SDC incentive for dwellings of 1,000 square feet or less. SDCs, when they apply, are separate from permit fees. Fee policies change, so we confirm the current Public Works and master fee schedules once the permit is moving. Newberg doesn’t offer an ADU SDC waiver like Salem’s.
Newberg lots and access
The older grid around downtown and George Fox can be tight, with short lots, alleys, and houses close to the property line. Downtown has a main street with the college within walking distance, which is why people want a backyard unit there, and it’s also why a crane on a fully parked block takes planning. Lots on 99W bring access issues, noise, and driveways built for customers or tasting-room traffic rather than a module. South and west plats are often wider and HOA (homeowners association)-controlled, and they’re still subject to the 50 percent / 1,000 test. Toward Dundee, the two cities blend together on the drive but remain separate on paper.
Delivery from Battle Ground takes a morning when the last mile is clear. Overhead lines, firs, and a 24-foot street with parking on both sides decide whether a single-wide is straightforward or a two-piece plan needs a traffic plan. Highway work on 99W and the college calendar go on the schedule too.
Models that fit 50 percent / 1,000
Wolf doesn’t sell HUD-code manufactured homes.
- Model K (~432 sq ft). A one-bedroom ADU under 1,000 square feet and under 50 percent of most houses.
- Model E / Model F (~616 sq ft). Two bedrooms when 50 percent of the primary still allows it.
- Model L (~984 sq ft), only when 50 percent of the house and the 1,000 cap both work. A 1,600-square-foot primary doesn’t allow an L.
If the house is 1,200 square feet, 50 percent is 600, so measure first. If you’ve already picked a model, we still check it against 1,000 square feet and 50 percent of the primary. Model I at about 1,232 square feet is over the city’s 1,000 cap for an ADU, and county rural lots use the county’s roughly 900-square-foot cap. In McMinnville, the published cap is 800 / 40 percent.
ADU versus vacation rental
If it has a kitchen and a bath, Newberg treats it as a dwelling. Family occupancy and long-term rental are the usual uses. Vacation home rentals and bed-and-breakfasts go through separate Newberg processes, often as a conditional use or Type II depending on the zone. Yamhill County prohibits short-term rental of the ADU on county lots. An ADU permit doesn’t cover Airbnb use.
Cost and timeline
The model gives us a reliable starting home price. We price trenching, electrical capacity, Type I review requirements, and any available SDC incentive after reviewing the property. Factory construction protects the home from Valley rain, while city review and site preparation still affect the schedule.
The Model K starts at $85,500 for the home itself. Permitting, delivery, installation, and site work are listed separately in your property-specific proposal. We confirm current fees for your property before preparing the proposal. A 99W backyard and a south-side plat won’t cost the same, so we quote after a property evaluation.
Financing is usually a HELOC, a cash-out refinance, or a construction-to-permanent lender familiar with factory-built ADUs. See financing.
Climate, soils, and utilities
The Willamette Valley is wet from fall through spring, so the house is built indoors. On the lot, silts and winter water change the excavation and erosion control plan. Summer is the easier set window, and winter sets need tighter site control.
Most in-city lots are on city water and sewer. That still leaves laterals, a cleanout, and whether the electrical service can handle a second dwelling. Under the code, shared lines can block a later partition. Outside the UGB, lots are often on a well and septic, and rural ADU rules plus septic design usually decide those parcels. If you don’t know which applies to your lot, that’s the first thing we check.
Site work and set
Foundation excavation, trenching, grading, and minor tree work so the home can sit are part of a normal Newberg job. A 99W frontage driveway or a street near George Fox with parking on both sides is why we measure access before we lock in a model.
A standard delivery trailer, and a crane when the swing needs it, get the home onto the foundation. We weather-seal the same day when we can, then handle the mechanical and plumbing tie-ins. Two-piece plans add a day to join the halves.
This is turn-key Oregon work: permitting support, site work, production, delivery, and setup as one job. Punch-list and warranty visits come from the same field crews that set the home, a drive from Battle Ground down I-5 and 99W.
After the set
Next come inspections, a walk-through, the punch list, keys, and warranty. Newberg inspectors control occupancy on city lots, so keep the approved drawings on site until they sign off.
Other cities nearby run their own permits. McMinnville is down 99W with its own city hall and its 800-square-foot cap, Dundee is next door, and Portland is up the highway with a completely different permit process.
What to send
Include the things you want to keep using outside, too: a garden bed, a parking space, or a path between the two homes. Those details belong on the property-review notes alongside the proposed building area.
An address is enough to start. Useful extras include a survey, a tax-lot and zoning printout, the square footage of the existing house (needed for the 50 percent test), a Type I pre-application note if you have one, photos of the backyard and the street approach, and whether the home is for family, a long-term rental, or a cottage you might live in. Vacation rental is a separate process, so tell us if that’s the plan. We check city versus county, the size cap, Type I versus conditional use, and whether a truck can reach the pad. If the lot won’t clear 50 percent of the house or can’t take a truck, we’ll tell you up front.
Send the address. Tell us city or county, where the building would sit, and how you’ll use it, and we’ll match a model to the cap that applies.
