KD Builders LLC
Philadelphia, PA
5.0(4)
ADU ConstructionCustom ADU
Specializing in ADU construction and related services in Philadelphia, PA.
Looking for the best custom ADU builders in Philadelphia, Pennsylvania? Our directory features 1 vetted custom adu builders serving the Philadelphia 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 Philadelphia, PA.
Philadelphia is one of the top markets for accessory dwelling units in Pennsylvania. With growing demand for affordable housing, ADU construction in Philadelphia offers homeowners an excellent opportunity to add living space, generate rental income, or house family members. Our curated list of custom adu builders in Philadelphia helps you find experienced professionals who understand local building codes, zoning regulations, and permit requirements.
ADU construction costs in Philadelphia 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 custom adu builders to compare prices.
Yes, ADU construction in Philadelphia requires building permits. Pennsylvania 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 Philadelphia 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.