Prefab / Modular ADU

An ADU (accessory dwelling unit) is a small secondary living space on the same property as a primary home. Also called granny flats or in-law suites, ADUs offer flexibility, affordability, and multigenerational living solutions.

New Frameworks builds prefab ADUs and small homes using natural, locally sourced Vermont materials. Their Casita models range from 314 to 1,200 sq ft, featuring high R-values, all-electric systems, and optional Passive House certification.

Everlife Home offers ADU packages with 1-2 bedroom floor plans, full kitchens, and standard finishes. As a full-service ADU contractor, they manage the entire build, with optional upgrades, decks, and storage add-ons available.

Core ADU is an accessory dwelling unit builder offering energy-efficient, accessible, low-maintenance detached ADUs. Featuring a prefabricated core module, flexible 460–750 sq ft plans, net-zero capability, zero-VOC materials, and full Omaha zoning compliance.

Joy Line Homes offers the ADURA ADU Series — factory-built backyard cottages and granny flats featuring modern design, high-end finishes, and durable materials. An affordable, plan-based ADU solution for homeowners seeking quality detached accessory dwelling units.

BuildLabs is a design-build company specializing in ADU construction across all 50 states. They offer custom and pre-approved plans, sustainable materials, and a streamlined 16-week build process covering planning, permitting, and final inspection.

Affordable Portable Housing Hawaii is a design-build company specializing in shipping container homes, offices, and structures. They offer drafting, permits, and full project development with financing options available.

DEN Outdoors offers modern house plans & prefab kits since 2020, including 40+ designs like cabins, A-frames & ADUs. Their 3-step process starts at $999, with building packages from $1,999 or prefab kits from $133K.

Bastion Structures offers modular concrete masonry homes, ADUs, and tiny houses that are fire-, mold-, and termite-resistant. Models range from 305 SF studios to 3,955 SF homes, ideal for California properties seeking durable, weatherproof living solutions.

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 ADUs.

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.

Type Five is a Berkeley, CA-based ADU builder offering custom backyard cottages, granny flats & in-law suites. They combine modular design, transparent pricing & streamlined construction for stress-free, high-quality detached ADUs built to last.

Forge ADU Builders is a Birmingham-based contractor specializing in accessory dwelling units (ADUs), including backyard cottages, garage conversions, and in-law suites. They handle design, permits, and turnkey construction across Jefferson County.

Ghousetechnologies is a California ADU contractor offering steel frame accessory dwelling units. Models range from 360–1,200 sq ft. Builds are fire, flood, earthquake, and hurricane-resistant, eco-friendly, and completed faster than traditional construction.

LADU is a full-service ADU builder in Los Angeles managing design, permits, and construction end-to-end. Serving LA, Orange, San Diego & more counties, they offer custom and prefab ADUs with transparent pricing and free on-site evaluations.