2 Best ADU Builders in Lake Oswego, Oregon
Verified ADU contractors and builders in Lake Oswego, OR
Showing 1–2 of 2 listings
Boss PDX
Transform your underutilized garage into functional living space with expert conversion services throughout Lake Oswego and the surrounding Portland metro area. Our experienced team specializes in garage-to-living-space conversions, handling everything from structural modifications to finishing touches.
Pro Metal Buildings
Transform your underutilized garage space into functional living areas with expert metal building conversions in Lake Oswego. Our specialized garage-to-living-space conversion services maximize your home's potential while maintaining structural integrity and aesthetic appeal.
Frequently Asked Questions — ADU Builders in Lake Oswego
How much does it cost to hire an ADU builder in Lake Oswego?
ADU construction costs in Lake Oswego, Oregon vary widely depending on size, type, and site conditions. Detached ADUs typically range from $150,000–$400,000+, while garage conversions and attached ADUs can be more affordable. Contact multiple builders in Lake Oswego to get accurate quotes for your specific project.
How long does it take to build an ADU in Lake Oswego?
In Lake Oswego, the ADU construction timeline typically ranges from 6 to 18 months from permit application to move-in. Permitting alone can take 2–6 months depending on Oregon local regulations. Prefab and modular ADUs often have faster timelines than site-built units.
Do I need a permit to build an ADU in Lake Oswego?
Yes, a building permit is required for ADU construction in Lake Oswego, Oregon. Your ADU builder will typically handle the permit application as part of their service. Oregon has adopted streamlined ADU permitting laws in recent years, which may reduce wait times.
What types of ADUs can be built in Lake Oswego?
Common ADU types in Lake Oswego include detached ADUs (backyard cottages), attached ADUs, garage conversions, basement conversions, and prefab/modular ADUs. The best type for your property depends on lot size, zoning, and budget. A local Lake Oswego ADU builder can advise on what's allowed on your specific parcel.