The cost of building an ADU is typically the most important factor for property owners considering such a project. Project cost varies by the size and type of structure, as well as the property characteristics and jurisdiction. In the Portland metro area, the average ADU now costs in excess of $200,000. In addition, as with many construction projects, the cost to build an ADU can increase significantly over the life of the project.

At Dweller, we believe that property owners should be able to purchase an affordable ADU at a predictable cost. We provide a fixed price that includes all aspects of an ADU project, including design, permits, construction, installation, utilities and landscaping. The only costs that aren’t covered by our fixed cost are improvements to the existing infrastructure on your property (e.g., sewer line, electrical wiring) and impact fees and system development charges imposed by local jurisdictions. With Dweller’s fixed cost pricing, you don’t have to worry about surprises during your ADU project.

Below you will find the estimated cost of building an accessory dwelling unit, along with the unexpected costs associated.