Prefab / Modular ADU

Victory Home Remodeling builds detached, attached, garage conversion, Junior, and above-garage ADUs in Los Angeles. Benefits include added property value, rental income, and multi-generational living. Timelines range from 2–10 months depending on ADU type.

ADU Company San Diego County specializes in off-site ADU construction, offering efficient, affordable accessory dwelling units. From granny flats to detached ADUs, their expert team guides clients from concept to Certificate of Occupancy.

Red's Construction & Renovation serves Federal Way & South King County, WA, specializing in ADU construction including detached, attached, garage conversions & basement units. Costs range from $50K–$300K+. Licensed, insured, transparent pricing.

Nunley Custom Homes builds ADUs in Greenville, SC—detached units, garage conversions, basement & attic ADUs. Costs range $150–$400/sq ft. Full permitting, zoning, and construction management included. 34+ years experience.

Elite Construction builds ADUs in Santa Cruz County, offering detached units, garage conversions & addition ADUs. Projects range 250–1,200 sq ft, cost $115K–$450K, and take 6–9 months. Free estimates available.

ADU Building Systems LLC builds factory & site-built ADUs in Massachusetts, including detached, attached & converted units. Offering 10-year structural warranties, cost savings up to 50%, and full-service design to turnkey construction.

Cali ADU is a top Los Angeles ADU builder offering custom and pre-designed accessory dwelling units, garage conversions, and granny flats. Fixed pricing, fast permitting, and expert project management ensure stress-free builds from design to move-in.

Studio Home is a Colorado-based prefab ADU builder serving all 50 states. With 18+ years experience and 6,000+ projects, they offer panelized ADU kits, backyard studios, granny flats, and in-law suites with fixed pricing and full project management.

Heritage Homes of Nebraska builds custom modular homes since 1978, meeting IRC standards. Factory-built in ~6 weeks, homes earn 5 Star Plus energy ratings. Offering single-story, two-story, ADU, and multifamily plans with guaranteed pricing.

Post and Beam Barns (Country Carpenters, Hebron CT) offers handcrafted post and beam kits ideal for ADUs, backyard cottages & in-law suites. With 50+ years experience, models include The Sterling, Hemingway & Barrett. Timeline: 4–12 months.

An Accessory Dwelling Unit (ADU), also known as a granny flat or in-law suite, is a self-contained living space that boosts property value by 20–30%, generates rental income, supports multigenerational living, and promotes environmental sustainability.

Prefab vs. stick-built ADUs explained. Homeplex offers the Clever ADU, an HCD-certified modular unit built all-electric in a factory, saving 5–6 months vs. traditional construction. Costs vary based on site conditions.

Dan Boyle Construction offers expert ADU construction in Santa Rosa & Sonoma County. With 30+ years experience, they handle site evaluation, permits, design & full builds for detached ADUs, granny flats & backyard cottages.

SnapADU is San Diego's largest detached ADU design-build company, completing 100+ builds with a 4.9+ rating. They offer in-house design, permitting, and construction with fixed pricing across San Diego County.