Portland has the easiest backyard tiny home rules on the West Coast
Portland Has the Easiest Backyard Tiny Home Rules on the West Coast
A Park Model RV on wheels fits Portland's city rules, skips the ADU permit process, and creates a comfortable second home you can use for family, rental income, or yourself.
If you live in Portland, you have one of the cleanest legal paths in the country to add housing in your backyard. Most cities make this hard. Portland made it deliberate. The reason is a single classification in the zoning code, and once you understand it, the whole path opens up.
This post is your Portland-specific overview. Our Buyer's Guide picks up where it leaves off and walks you through everything from financing to delivery day.
What People Use a Backyard Park Model For
What Portland Allows in 2026
Portland treats tiny homes on wheels and Park Model RVs as occupied recreational vehicles, not ADUs. That single classification is what makes this path so much easier. The rules sit under Title 33, Section 33.266.150 of the city zoning code:
- One home on wheels per lotYou can host one occupied RV or tiny home on wheels on a residential lot that already has a primary home (house, attached house, or manufactured home).
- Behind the main houseThe home on wheels has to sit behind the front face of the primary house. No parking it in the front yard.
- At least 5 feet from the main housePortland requires a minimum 5-foot separation between the two structures.
- Stays mobileThe wheels stay on. You level the home on blocks or piers and add skirting for a finished look.
- Needs an existing main homeYou can't put a Park Model on a vacant lot, and the tiny home doesn't count against your normal residential density.
- Long-term living is allowedYou can occupy it year-round. Long-term rentals are fine. Short-term rentals (Airbnb, VRBO, anything under 30 days) are not allowed.
- It's not an ADUIt's an occupied RV built to ANSI A119.5 standards. That's how you avoid the full ADU permit set and System Development Charges.
Portland offers free 15-minute appointments with a city planner if you want to confirm your specific lot. We recommend taking them up on it before you buy.
Park Model RV vs. ADU
Most people who land here are choosing between a Park Model and a stick-built ADU. Here's the side-by-side:
You give up two things going Park Model: permanent foundation status (which affects financing options and resale category) and the absolute privacy of a fully separate building permitted as housing. You gain about two-thirds of the capital, three-quarters of the time, and a path that's measurably less complicated. Schedule a showroom visit and we'll run the math on your specific lot.
Outside Portland? SB 1013 May Apply
If your land is in Oregon but outside Portland city limits, the rules change by county. Oregon's Senate Bill 1013 (2023) created an opt-in path for counties to allow tiny homes on wheels as long-term dwellings on rural residential property.
So far, three counties have opted in: Clackamas, Deschutes, and Lane. If you're in one of those, you can place a tenant-owned Park Model RV on a property with an owner-occupied primary home. For the full picture across Oregon and Washington, see our Zoning & Permits page.
Hookups You'll Need
Portland's rules are built around standard RV-style hookups. If your Park Model has plumbing (almost all do), here's what your contractors will install:
Power
- Dedicated outdoor electrical connection sized for the home (most Park Models need 50-amp RV-style service)
- Pedestal or panel-mounted RV receptacle
- Licensed electrician handles breaker, wire, and pedestal
Water
- Potable water connection near the home (frost-free hose bib or campground-style spigot)
- Drinking-water-rated hose to the home
Sewer
- RV-style sewer tie-in to your main house sewer line, typically through a permitted cleanout
- Licensed plumber pulls the permit and ensures it passes inspection
Gas (if used)
- Most Park Models use propane or natural gas for the range, water heater, washer/dryer
- Above-ground or buried propane tank, filled on-site
When you buy from us, we share typical hookup diagrams and connect you with electricians and plumbers who already know what these homes need. That alone saves most buyers a few weeks of false starts.
Why This Path Works So Well in Portland
Portland is one of the few major U.S. cities where tiny homes on wheels are clearly legal as backyard housing, with specific city code that says so.
- Faster setup, lower costNo full ADU permit set, no foundation, no design review. Most owners just prep a pad and add RV hookups.
- Real flexibilityHost family, run a long-term rental, or downsize into the tiny home and rent out your main house.
- A clear legal path, not a loopholePortland Title 33 explicitly addresses occupied RVs. You're not bending a rule.
Your Path to a Backyard Tiny Home in Portland
- Confirm zoning and fitVerify your lot qualifies and that you have room to deliver and place the home. A free 15-minute call with a Portland planner removes most of the guesswork.
- Visit our Portland lot and pick your homeSchedule a tour at NW Tiny Homes to walk through models, compare layouts, and choose your floor plan.
- Lock in paymentPay cash or finance through a Park Model RV-friendly lender like 21st Mortgage. Our loan calculator gives you a quick monthly estimate.
- Plan utilities and pad prepCoordinate an electrician and plumber for power, water, and sewer connections, plus a gravel or concrete pad.
- Schedule delivery and setupWe coordinate transport, help place the home on its pad, and review warranty items once it's on site.
- Move in or host long-termOnce hookups are inspected and insurance is in place, you or your tenant settle in.
Mini FAQ
Is this an ADU?
No. It's an occupied RV / Park Model RV on wheels. That distinction is what keeps the process faster and simpler than a traditional ADU build.
Can I remove the wheels?
No. The wheels stay on. Level it on blocks or piers, add skirting for a clean look, and the home stays classified as an RV.
Can I rent it out?
Long-term rentals are allowed. Short-term rentals (Airbnb, VRBO, anything under 30 days) are not allowed for occupied RVs in Portland.
Do I need a big building permit?
No full ADU permit set. You will still need standard permits for the electrical and plumbing hookups your contractors install.
How long does delivery take?
Most of our Park Models build in 8 to 12 weeks. Add 2 to 4 weeks for site prep and hookup work depending on your lot.
Can I live in it full-time year-round in Portland weather?
Yes. Park Model RVs are insulated and weather-rated for year-round PNW use. Skirting and proper hookups handle the rest.
What about insurance?
You'll insure it as a Park Model RV. We can connect you with agents who write these policies in Oregon. See our guide to insuring a Park Model RV.
Ready to See One in Person?
Walk through Willow and Alder at our Portland showroom, 11 to 6, every day. We're at 1110 NE Columbia Blvd. and we'll answer every question your contractor will ask.
