Prefab / Modular ADU

New England Outdoor, a family-owned business in Methuen, MA, builds custom sheds, garages, pavilions, and ADUs across New England. Specializing in ADU construction, garage conversions, and in-law suites, they handle design, permits, and zoning guidance.

Urban ADU builds energy-efficient accessory dwelling units in Colorado Springs, CO. Featuring spray foam insulation, solar options, Zero Energy Ready certification, and 3D planning tools, they simplify ADU construction from permits to placement.

New Frameworks builds high-performance ADUs and Casita homes using natural Vermont materials. Six models range from 314–1,200 sq ft, featuring R-38+ insulation, ERV/HRV ventilation, all-electric systems, and optional Passive House certification.

TinyMod® offers turnkey ADU solutions in Omaha, NE, including custom plans, prefab & site-built construction. Designs range from studios to 2-bedroom units, built for local zoning compliance, affordability, and energy efficiency.

Regency Construction & Remodeling BA is a San Francisco ADU contractor offering new builds, space conversions, and prefab ADU solutions. They handle design to completion, manage permits, and ensure compliance with local zoning laws.

Integrity Timber Frame offers custom prefabricated timber frame home, cabin, and ADU kits in South Dakota. Using their TruFit™ System and SIPs panels, they deliver strong, energy-efficient, sustainable structures with faster assembly and potential cost savings.

CityPaks is a minority & woman-owned ADU builder in the San Francisco Bay Area specializing in affordable, sustainable backyard cottages & detached ADUs using SIP panels. No crane needed, no sales tax, pre-approved in San Jose.

MassDwell Solutions builds modular ADUs for homeowners, investors & developers. Models range from 470–892 sqft, starting at $164,500. Factory-built steel frame units include full warranties, energy-efficient features & 8–12 week installation.

KW Tiny Homes offers Florida-based prefab tiny homes & ADUs from $29,999. Models include granny flats, in-law suites & smart homes up to 1,074 sqft. Pre-installed electrical & plumbing included.

Crest Backyard Homes is San Diego's trusted ADU builder, specializing in prefab, detached ADUs, granny flats & garage conversions. Their all-inclusive team guides homeowners from design to completion, ensuring code-compliant, high-quality accessory dwelling units.

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, engineering, permitting, and installation.

Fabmac Homes builds custom manufactured homes on Maui with 20+ years experience. Factory-built at Clayton Homes, shipped to Maui in 6–8 months. Features include hurricane-rated construction, energy efficiency, and permanent foundations. Ideal for ADUs, granny flats, or in-law suites.

Studio Home by Studio Shed offers custom & prefab ADUs across Texas, including San Antonio, Austin, Dallas & Houston. Units range from studios to full living spaces. Permit costs vary: Dallas $3K–$8K, Houston $2.5K–$7.5K.

Zook Cabins is a trusted ADU builder offering A-Frame Modern and Sonoma ADU models in 1-2 bedroom layouts. As a certified detached ADU builder, they provide granny flats, in-law suites, and backyard cottages with regulatory guidance included.

Turnkey ADUs is a Leominster, MA ADU contractor offering modular, prefabricated accessory dwelling units across New England. Models range from $119K–$249,900. Massachusetts' 2024 Affordable Homes Act now allows ADUs up to 900 sq. ft. by right.