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Lake Oswego, OR
5.0(14)
ADU ConstructionDesign-Build ADUGranny Flat
Specializing in ADU construction and related services in Lake Oswego, OR.
Looking for the best backyard cottage builders in Lake Oswego, Oregon? Our directory features 1 vetted backyard cottage builders serving the Lake Oswego area. Whether you're planning a new ADU construction, garage conversion, or backyard cottage, find the right builder for your project.
Specializing in ADU construction and related services in Lake Oswego, OR.
Lake Oswego is one of the top markets for accessory dwelling units in Oregon. With growing demand for affordable housing, ADU construction in Lake Oswego offers homeowners an excellent opportunity to add living space, generate rental income, or house family members. Our curated list of backyard cottage builders in Lake Oswego helps you find experienced professionals who understand local building codes, zoning regulations, and permit requirements.
ADU construction costs in Lake Oswego typically range from $150,000 to $350,000 depending on size, design, and finishes. Garage conversions are generally less expensive ($80,000–$150,000), while custom-built detached ADUs can cost more. Get free quotes from our listed backyard cottage builders to compare prices.
Yes, ADU construction in Lake Oswego requires building permits. Oregon has specific ADU regulations, and local zoning laws may have additional requirements. Our listed builders can help you navigate the permitting process.
ADU construction timelines in Lake Oswego typically range from 4–12 months, depending on the project type. Prefab ADUs can be installed in 2–4 months, while custom builds may take 8–12 months including design and permitting.