Every summer we get the same question from Beaverton homeowners: "did the ADU rules change this year?" Here is the honest answer for July 2026 — the state legal framework that makes your ADU possible has been stable for years, and it is strongly in your favor. What actually changes each year is local: fee schedules, review workloads, and how Beaverton's middle housing code interacts with your specific lot. This post walks the law that protects your right to build, the myths that legally died years ago but still circulate, and the checklist worth running before you submit anything this summer.
The foundation: what Oregon SB 1051 actually did
Senate Bill 1051, signed in 2017, is the reason an ADU is a right and not a favor in Beaverton. It requires cities with more than 2,500 residents — and counties with more than 15,000 — to allow at least one accessory dwelling unit for each detached single-family home inside the urban growth boundary, subject to reasonable local siting and design regulations. A follow-up bill, HB 4031 (2018), cleaned up the drafting and confirmed the requirement applies inside urban growth boundaries. Beaverton is squarely covered. If you own a detached single-family home in Beaverton, the starting legal presumption is that you may add an ADU.
"Reasonable local regulations" is the operative phrase. The city still governs setbacks, height, lot coverage, design standards, and utility connections. That is where real projects are won or lost — not on whether an ADU is allowed, but on whether your ADU fits your lot. We covered the full permit sequence in our companion piece, ADU Permits in Beaverton 2026: Pathway, Timeline, and Cost.
HB 2001 and middle housing: the second layer
Two years after SB 1051, Oregon passed HB 2001 (2019) — the middle housing law. For larger cities like Beaverton it required zoning to allow duplexes, triplexes, quadplexes, townhomes, and cottage clusters in areas previously reserved for single-family homes. For ADU owners specifically, HB 2001 did two enormous things:
- It banned owner-occupancy requirements. Cities may not require you to live in either the main house or the ADU. You can rent both. That single change is what made the ADU-as-investment math work for many Beaverton owners.
- It banned added off-street parking requirements for ADUs. The city cannot condition your ADU permit on carving a new parking space out of your yard.
Beaverton implemented middle housing through its development code, and conforming ADUs in Beaverton go through ministerial review — a staff-level check against objective standards, not a discretionary public hearing. That is why a complete, code-conforming first submittal moves fast and an incomplete one does not.
So what is actually different in summer 2026?
Three practical things — none of them a new statute, all of them worth knowing before you submit:
- Fee schedules reset with the fiscal year. Like most Oregon cities, Beaverton updates its planning and building fee schedules around July 1. If you priced your project off last year's numbers, re-pull the current schedule from the city before you budget. We verify current fees as part of every feasibility check rather than quoting stale figures.
- The state is pushing production harder, not softer. SB 1537 (2024) created a state Housing Accountability and Production Office and a package of tools aimed at getting more housing approved and built. The policy direction in Salem for years has run one way: fewer barriers to units like ADUs, not more. Nothing on the books rolls back your SB 1051 or HB 2001 rights in 2026.
- Middle housing gives some lots a better option than an ADU. This is the conversation most homeowners have never had. On some Beaverton lots, what pencils best is not a backyard ADU — it is a cottage cluster, a duplex conversion, or an internal ADU plus a garage conversion. The right answer depends on your zone, lot dimensions, and utility capacity, and it is exactly the comparison we run in a free feasibility check.
Myths that are still costing Beaverton homeowners money
| Myth | Reality in 2026 |
|---|---|
| "I have to live on the property to rent the ADU." | No. HB 2001 barred owner-occupancy conditions. Both units can be rentals. |
| "The city will make me add a parking space." | No. Added off-street parking cannot be required for the ADU. |
| "ADUs need a public hearing and the neighbors can block it." | Conforming ADUs are reviewed ministerially against objective standards. Neighbors do not get a veto. |
| "The rules change so often it is not worth starting." | The core rights have been stable since 2017-2019. What changes annually is fees and workload — plan for those, then build. |
Your pre-submittal checklist for summer 2026
- Confirm your zone and overlay districts. Base zoning decides your setbacks, height limit, and lot coverage math.
- Size the unit to the standard. Most Beaverton R-5 and R-7 lots support a detached ADU under 800 square feet; the practical cap for your lot comes out of the setback and coverage math, not just the code ceiling.
- Verify utility capacity early. Sewer depth and location, water meter sizing, and panel capacity kill more ADU budgets than any design decision.
- Pull the current fee schedule. Budget off this year's numbers, not a blog post from two years ago — including ours.
- Compare the middle housing alternatives before committing to a detached ADU. Sometimes the better project is a different shape.
- Submit complete. A complete first package is still the single biggest timeline lever in Beaverton. Plan review corrections cost weeks each cycle.
Detached, attached, or internal: which pathway fits summer 2026
The legal rights above apply to all three ADU types, but the practical calculus differs, and summer is the right season to start each for a different reason. A detached ADU started now gets its land use and building review done during the fall so foundation and framing can land in the drier months — the sequencing that keeps a backyard build from turning into a winter mud project. An attached ADU shares the same logic on a smaller scale, since you are opening a wall of the existing house and want the envelope closed before the rains return. An internal conversion — typically a basement build-out with its own entrance — is the least weather-sensitive of the three and often the fastest permit, which makes it the strongest candidate if your goal is rental income by early 2027.
The honest way to choose is not preference but arithmetic: what does each pathway cost on your specific lot, what rent does each realistically command, and how many months of that rent does the added site work on a detached unit consume? We walk that comparison — including the middle housing alternatives — in every feasibility conversation, because the most expensive ADU mistake in Beaverton is not a permit problem. It is building the wrong type for the lot.
Where Green O fits
We build ADUs with the architect on our own payroll, three PE engineering firms on retainer, and our own excavation equipment — which means feasibility, drawings, engineering, permit, and construction run under one roof and one schedule. Start with the free lot feasibility check: we pull your zoning, walk the lot, check the utilities, and tell you honestly whether an ADU pencils on your property — and if a different middle housing option pencils better, we tell you that too. See the full pathway on our Beaverton ADU page, our Additions and ADUs service page, or our Beaverton service area page.
Veteran-owned. CCB #204939. Architect on payroll. Mon through Sat, 8 AM to 7 PM. Closed Sundays.