ADU Contractors

Harjo Construction builds AADUs & DADUs in Seattle with 300+ projects since 2010. Costs range $275K–$650K, max 1,000 sq ft, 4–6 month build time. Seattle removed owner-occupancy rules, boosting ADU rental potential.

Global Arch Construction builds ADUs in Sacramento, offering detached units, garage conversions & in-law suites. Licensed design-build contractor managing permits, zoning & full construction. Projects completed in 4–8 months.

More Concrete Inc. is a licensed, bonded ADU contractor in San Diego specializing in concrete foundations for detached ADUs, in-law suites, and home offices, helping homeowners expand living space and increase property value.

Unlimited Construction & Remodeling (UCR), a licensed Beverly Hills contractor, serves LA, Orange & Ventura Counties. Specializing in garage conversions, ADUs & home remodeling, this family-owned firm delivers budget-conscious, code-compliant residential & commercial renovations.

BLD House is a design-build ADU contractor offering fully in-house prefab accessory dwelling units. Their modular, off-site construction method ensures quality and cost efficiency. Starting at $299,000 for a 500 sq ft 1bed/1bath unit.

Martin Squared Contracting builds custom ADUs in Austin, TX. Services include garage conversions, detached units, guest houses, and rental spaces. They handle design, permitting, compliance, and turnkey project management for residential and investment properties.

First Choice Home Builders is a licensed San Diego ADU contractor with 15+ years of experience. They offer full-service ADU construction, including detached ADUs, garage conversions, and JADUs, with permit handling and flexible financing options.

IHS is a Boise home builder specializing in ADU construction. Their Darlington Place project features six homes with basement Accessory Dwelling Units, offering flexible living for rentals, in-law suites, or multi-generational families.

SE Builders Inc completed an ADU project in Fullerton, CA, transforming a structure into a modern living space. Features include updated framing, durable finishes, eco-friendly materials, energy-efficient systems, and low-maintenance landscaping.

Giudice Builds is a Colorado Springs ADU contractor specializing in accessory dwelling units. Projects range from $250K–$400K+, with planning from $5K. A recent 640 sq ft ADU was completed in 6.5 months for $230K.

Queen Boss Construction builds ADUs in Charlotte, NC—detached cottages, attached suites, and garage or basement conversions. With 20+ years of experience, they handle design, permits, and construction for rental units, in-law suites, and more.

All Under One Roof builds ADUs, granny flats, garage conversions & in-law suites. Licensed, insured, 31+ years experience. Full-service ADU contractor handling design, permits & construction with a lifetime workmanship warranty.

Backyard ADUs is a full-service ADU builder serving New England, specializing in backyard cottages, granny flats, and in-law suites. They offer feasibility studies, design, permitting, and zoning research across Massachusetts, Maine, and New Hampshire.

Jet Development is a Las Vegas-based design-build contractor with 20+ years of experience specializing in ADUs and Casitas. They manage design and construction in-house, helping homeowners add valuable living space with a client-focused approach.