Prefab / Modular ADU

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 sustaina... read more

Virginia ADUs—backyard cottages, garage conversions, basement apartments—add living space or rental income. Premier Structures builds compliant ADUs statewide, navigating local zoning, permits, and size rules (250–1,200 sq ft).

JT Collective Tiny Homes, a licensed Clovis, CA dealer and manufacturer, builds custom tiny homes on wheels for ADUs, in-law suites, or primary residences, offering upgrades like SIPs, heated flooring, and ADA-compliant designs tailored to client ... read more

NW Finishing is a Seattle-area ADU contractor offering full-service accessory dwelling unit design and construction. Serving Bellevue, Kirkland, Redmond, Renton, and more, they handle permits, planning, and builds for detached, cottage, and prefab... read more

Alpine ADU builds custom & prefab ADUs, garage conversions, and tiny homes across Greater Denver, Boulder, Fort Collins & Colorado Springs. Services include design, permits, and full construction management on Colorado's Front Range.

MyADU4Less is a Southern California ADU builder specializing in prefabricated accessory dwelling units. Offering models from 160–1,200 sq ft, they handle design, permitting, and construction. CalHFA grants up to $40,000 may apply.

USModular Inc. is a Temecula, CA ADU builder specializing in modular, prefabricated construction. Units are up to 90% factory-built, completed in ~120 days, and comply with IRC and local codes. Services include feasibility studies, design, enginee... read more

Housetopia Inc. builds modular homes, ADUs, and tiny homes in North Carolina, serving Concord, Salisbury, and Lake Norman. Homes range from $90K–$350K. They offer off-site construction, transparent pricing, and flexible options for guest suites,... read more

Pratt Homes is a Texas-based modular home builder serving TX, LA, OK & AR since 1996. Offering customizable floor plans, energy-efficient construction, and models like The Barndo, Bourbon & Rosie. BBB A+ rated.

Paramount Manufactured Sales in Riverside offers Skyline Homes-built ADUs for Southern California homeowners in LA, Orange, Riverside, San Bernardino & San Diego Counties. Models range from 479–849 sq ft. California law now allows detached A... read more

ADU Custom Homes is a licensed California ADU contractor with 35+ years of experience serving LA, Orange & Riverside counties. They specialize in detached ADUs, garage conversions & additions, managing projects from permits to Certificate ... read more

Lake City Homes builds modular ADUs for multi-generational living, rental income, and more. Constructed indoors for quality control, these code-compliant units serve as backyard cottages, in-law suites, or guest spaces with 50+ years of building e... read more

Leland's Cabins offers site-built and modular prefab ADUs for rental income, family housing, or added property value. Options include accessible designs, custom finishes, and code-compliant stationary tiny homes suited to various local regulations... read more

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.

Level Up Contractor is an ADU builder in Los Angeles offering garage conversions, detached ADUs, and JADUs. Services include full permitting, design-build, and LADBS coordination. Costs range from $100K to $450K depending on project type.