ADU Construction in Beaverton, Oregon
Jenson Contracting works with homeowners navigating the ADU requirements in Beaverton, Oregon and the surrounding areas. As an experienced ADU contractor, they understand that local regulations can vary significantly depending on the zone and municipality, and that getting the details right from the start is essential to a successful project.
Whether the goal is a detached ADU, a garage conversion, or an in-law suite, understanding the local code requirements is a critical first step. Below is a general overview of the key requirements that typically apply to accessory dwelling units in the Beaverton area.
Size RestrictionsADU size limits depend on the specific jurisdiction. In some areas, detached ADUs must be 800 square feet or less, while other zones allow up to 900 square feet or 85% of the primary dwelling's floor area — whichever is less. Jenson Contracting helps clients understand which limits apply to their specific property before any design work begins.
Height and Setback RequirementsHeight limits for accessory dwelling units vary by zone. As a reference point, in Tigard, the maximum height for a detached ADU is 25 feet. Setback rules also differ by location — for example, a detached ADU that is 15 feet or less in height may be permitted within 5 feet of a rear property line in certain zones. These are the kinds of specifics that a knowledgeable ADU builder like Jenson Contracting keeps track of when planning a project.
Lot Coverage and Unit Requirements
Lot coverage is another factor that must be considered. In zones such as R-7 and R-12 in Tigard, the addition of an ADU cannot cause total lot coverage to exceed 80%. This affects how large a backyard cottage, granny flat, or Casita can realistically be on a given property.
Regardless of size or style, all ADUs in this region are required to include a dedicated bathroom and kitchen. This is what distinguishes a true accessory dwelling unit from other types of additions. Additionally, the ADU must not have a direct interior connection to the main house — it functions as a separate, self-contained living space.
Jenson Contracting brings practical knowledge of these local requirements to each project, helping homeowners move through the planning and permitting process with a clearer understanding of what is involved. Their experience as an accessory dwelling unit builder in the Beaverton and greater Portland metro area means they are familiar with the nuances that can affect project timelines and outcomes.