requirements and regulations for ADU development

As of July 1, 2018, ADUs are allowed by right on all residential properties within most Oregon cities and counties. The right to build an ADU is still subject to local regulations and codes regarding the size and location of the accessory structure.

The most common ADU codes administered by Oregon cities and counties regulate the:

• size of the ADU;

• location of the ADU; and

• design guidelines or architectural consistency with the primary residence.

In addition, each jurisdiction has its own process for permitting ADUs and can assess its own fees for permits and development impact. In particular, impact fees or system development charges (SDCs) vary widely among local communities, with some communities waiving these fees entirely and others charging fees of $20,000 or more per ADU.

Dweller handles the entire permitting process, and can provide guidance on feasibility and cost for a Dweller ADU in your jurisdiction. Below are the ADU permitting requirements for various Oregon communities. Contact Dweller at info@dweller.com if you don’t see your community listed below.