rv-park
Roamer's Rest RV Park
Tualatin, OR (~10 mi SE of Hillsboro)
Year-round Washington County RV park with electric and water hookups, located near Wine Country, Intel, and Nike WHQ; supports long-term stays.
Friendly
Tiny Homes in Hillsboro, Oregon
Hillsboro tiny home zoning, ADU rules, THOW parking, and builder costs for Washington County, Oregon.
Last researched May 2026
$85,000 – $170,000
Builder cost range
6
Builders serving area
106,894
Population
Friendly
Tiny-home friendliness
Why Hillsboro
Hillsboro anchors Oregon's Silicon Forest with strong tech employment, higher median incomes, and good MAX light rail connectivity to Portland. The Pacific Northwest climate means wet winters; builders here often focus on foundation-based ADUs and cottage clusters more than THOWs. Washington County's rural edges offer additional options.
Zoning & Placement
Hillsboro follows Oregon's statewide ADU baseline under ORS 197A.425 and implements HB 2001 middle-housing rules through the Hillsboro Community Development Code. ADUs are permitted on detached single-family lots, and duplexes are allowed in most residential zones. THOW placement as a primary dwelling is not explicitly legalized; RV-classified tiny homes must be accessory to a permanent home. Always confirm specifics with Hillsboro Planning before siting.
Verify current requirements with your local planning department.
What to verify locally
- • Confirm whether your tiny home will be treated as an ADU, a site-built dwelling, or a recreational vehicle.
- • Ask about utility hookup requirements, especially sewer, electrical service, and emergency-access setbacks.
- • Check whether long-term occupancy is allowed on the lot type you are considering.
- • Verify minimum square footage requirements for your zone classification.
ADU & Backyard Tiny Homes
ADUs are permitted statewide under ORS 197A.425, which Hillsboro implements. As of May 2026, detached and attached ADUs up to 800 sq ft are allowed on most single-family lots with no owner-occupancy and no additional off-street parking requirement for the baseline unit. Standard residential setbacks and the underlying zone's lot-coverage limits apply, and detached ADUs must meet building code separation and access standards. A building permit is required, and System Development Charges may apply for water, sewer, and parks; consult Hillsboro Planning before final design to confirm any zone-specific limits.
Where to Park
Communities, RV parks, and parking options in and near Hillsboro.
Hillsboro treats tiny houses on wheels as RVs. Placement on a residential lot requires a primary dwelling, proper utility hookups, and compliance with Hillsboro's parking and setback codes. The city has no Portland-style explicit occupied-RV allowance, so verify with Hillsboro Planning before placing.
rv-park
Hillsboro RV Village
Hillsboro, OR
RV park within Hillsboro offering nightly, weekly, and seasonal rates with a posted park map showing both RV and tent sites.
co-housing
Trillium Hollow Cohousing
9601 NW Leahy Rd, Portland 97229 (~10 mi east of Hillsboro)
28-unit multigenerational cohousing community on 4 wooded acres in the Cedar Mill area, the closest established cohousing community to Hillsboro.
Builders Serving Oregon
Seattle Tiny Homes
Buckley, Washington
Buckley-based builder and one of Washington's first to embrace L&I factory inspection. Builds ANSI 119.5 certified THOWs, park models, and modular tiny homes. CEO Todd McKellips also serves as executive director of the Washington Tiny House Association.
THOW Park models Modular homes ANSI 119.5 certified
Service areas: Washington, Oregon, California
Tiny Heirloom
Portland, Oregon
Portland-based luxury tiny home builder featured on national television. Family-owned company offering fully custom THOWs, park models, ADUs, and commercial builds. Signature Series starts at $129,900. Builds designed for Oregon's climate with moisture resistance and thermal insulation.
Luxury custom THOW Park models ADU Commercial tiny home projects
Service areas: Oregon, Washington, California
Tru Form Tiny
Eugene, Oregon
Eugene-based luxury tiny home builder with over 300 handcrafted homes delivered. Family-owned company with PHIUS and LEED backgrounds emphasizing sustainable building practices. Offers both signature models and fully custom builds with financing starting at $697/month.
Luxury THOW Custom builds RVIA certified Sustainable materials
Service areas: Oregon, Washington, California
Wolf Industries
Battle Ground, washington
Battle Ground factory builder producing modular tiny homes, ADUs, and single-family homes. Over 500 homes placed in five years. New 21,000 sq ft factory doubles production capacity to two homes per week.
Modular homes ADU focused Prefab / factory-built IRC compliant
Service areas: washington, oregon, california, montana, idaho
DC Structures
Damascus, Oregon
Oregon-based pre-engineered building kit manufacturer offering prefab cabin kits (including the 495 sq ft Mazama model) and backyard ADU kits shipped nationwide. Founded in 2002 alongside sister company DC Builders; maintains Delaware-specific design and pricing resources for cabin and ADU projects.
Prefab / modular ADU
Service areas: Delaware, Maryland, Virginia, Pennsylvania, New Jersey, New York, Oregon
Dweller
Portland, Oregon
Portland-based prefab ADU specialist offering turnkey modular accessory dwelling units with fixed pricing. Handles all aspects from site planning and permitting to utilities, installation, and landscaping. Rent-ready units delivered in under five months.
Prefab ADU Modular construction
Service areas: Oregon
Costs
A comparison between tiny-home living and conventional homeownership in Hillsboro.
Tiny home path
Builder cost range $85,000 – $170,000
Estimated monthly total
Traditional home path
Median home price
Estimated monthly total
Potential monthly savings
Common Questions
Can I live full-time in a THOW in Hillsboro?
Not as a standalone primary dwelling. THOWs are treated as RVs and must be accessory to a permanent residence on the lot.
Are ADUs allowed in Hillsboro?
Yes. Under ORS 197A.425 and Hillsboro's code, detached and attached ADUs up to 800 sq ft are permitted on most single-family lots.
Is Hillsboro more expensive than other Oregon cities?
Yes. Tech-driven demand pushes land and builder costs higher than Salem or Eugene, though still below central Portland.
What about rural Washington County?
Unincorporated Washington County often allows more flexibility for RV-classified tiny homes on larger acreage, subject to septic, setback, and access rules.
Guides for Oregon Buyers
Guides, zoning explainers, and financing articles related to this state.
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