ADU Construction in Newberg, Oregon — What You Need to Know
Jenson General Contracting works with homeowners in the Newberg, Oregon area on accessory dwelling unit projects. Whether you're considering a detached ADU builder for a backyard cottage, a garage conversion contractor, or an in-law suite builder for a family member, understanding local requirements is an important first step before breaking ground.
ADU requirements in Newberg and the surrounding Oregon communities can vary depending on the zone and property type. Below is a general overview of the key regulations that typically apply to accessory dwelling unit construction in this region.
Size Restrictions
The size of an ADU is generally limited based on the size of the primary dwelling on the lot. In some areas, detached ADUs must be 800 square feet or less, while other jurisdictions allow up to 900 square feet or 85% of the primary dwelling's floor area — whichever is less. Jenson General Contracting can help homeowners navigate these limits during the planning phase.
Height Limits
Height restrictions for ADUs vary by zone. As a reference point, in nearby Tigard, the maximum allowable height for a detached ADU is 25 feet. Local zoning rules will determine what applies to a specific property in Newberg.
Setback Requirements
Setbacks — the required distance between a structure and property lines — also differ by zone. In Tigard, for example, a detached ADU that is 15 feet or less in height may be placed within 5 feet of a rear property line. These rules can significantly affect where on a lot an ADU can be built.
Lot Coverage
Local regulations typically include lot coverage maximums. In Tigard's R-7 and R-12 zones, adding an ADU cannot cause total lot coverage to exceed 80%. This is an important consideration when planning the footprint of a granny flat, Casita, or backyard cottage.
Required Features for an ADU
Regardless of the specific zone, most ADUs in Oregon must include certain features to qualify as a legal accessory dwelling unit:
- A dedicated bathroom
- A dedicated kitchen
- No direct interior connection to the main house
These requirements help define an ADU as a self-contained living space, separate from the primary residence. This applies whether the unit is a detached ADU, a JADU (junior accessory dwelling unit), or a converted garage.
Working with Jenson General Contracting on Your ADU Project
Jenson General Contracting has experience working through the regulatory landscape that comes with ADU construction in Oregon. Because requirements vary by zone and municipality, having a knowledgeable ADU contractor involved early in the process can help avoid costly mistakes or delays.
If you're exploring options for a detached ADU, an in-law suite, or another type of accessory dwelling unit on your property in the Newberg area, Jenson General Contracting is available to discuss your project and help determine what may be feasible given your specific lot and zoning conditions.