Detached ADU

We are H-1 Construction, one of the few local, family-owned, and operated home builders in Honolulu, Hawaii. We take pride in our work and the relationships we have fostered over the years.

BuildForm Design is a Los Angeles general contractor offering full-service ADU design, build, and value engineering. With 15 years of experience, they handle basement conversions, detached ADUs, garage conversions, and more across Southern California.

American Helical (CA LIC #1128975) is a full-service ADU contractor in California offering planning, design, permitting, and construction. A 3rd-generation builder, they provide pre-designed models, custom ADUs, and prefab installs across multiple counties.

Whether you’re thinking about an ADU home addition for a parent, guest space, or long-term tenant, we’ll help you plan and build without the usual delays or confusion. Our team handles permits, design, and construction while keeping you in the loop at every step. From the first walkthrough to final inspection, you’ll work with a reliable crew that shows up and gets the job done right.

Northwest ADU is a trusted ADU builder in Mill Creek, WA, offering full-service accessory dwelling unit construction, including detached ADUs, garage conversions, and basement conversions, with expert permit and zoning support.

Jones Urban Development Co, a division of Populace Homes of Memphis, specializes in ADUs, backyard cottages & small homes in Memphis & Shelby County. With 30+ years experience, they pioneer energy-efficient construction innovations.

HBC Construction, based in Fremont, CA, specializes in ADU building, garage conversions, new homes & additions across the Bay Area. Licensed, code-compliant, full-service from planning to completion.

reVision Charlotte is a Charlotte, NC ADU builder specializing in accessory dwelling units, including backyard cottages, garage conversions, and in-law suites. They offer expert design and construction for rental, multigenerational, or guest living spaces.

Woollard Construction is a family run general contractor specializing in ADUs and bathroom remodels. Formed over 25 years ago in Temecula, California, we deliver professional building projects with care and precision in Temecula and Murrieta.

Lehman Construction is a trusted ADU builder in Michiana, serving Goshen, Elkhart & more. Custom accessory dwelling units from $210,000. 30+ years of craftsmanship, 3D design, and full code compliance.

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.

OC Builders Group specializes in ADU construction in California, offering detached ADUs, garage conversions, granny flats & in-law suites. They help homeowners navigate permits, zoning & state regulations to add rental income or housing value.

Accuracy Remodeling LLC, serving Merced, CA since 2013, offers new construction, remodeling, and ADU contracting for residential and commercial clients. Licensed, insured, and free estimates available.

ResCom ADU is a full-service ADU builder in Walnut Creek, CA, offering design, permits, engineering, construction & hookups. With 100+ years of combined experience, they deliver custom, cost-effective accessory dwelling units using SIPs & Net-Zero technology.

Lapp Structures builds ADUs (Accessory Dwelling Units), including detached garages with living quarters. A 3-car Gambrel garage ADU costs $50K–$60K. ADUs offer flexible living, rental income, and family housing solutions.