Attached ADU near Montclair, CA

Katz Design & Builders Inc offers full-service ADU construction across Los Angeles and Orange County. Services include detached ADUs, garage conversions, attached ADUs, and JADUs, all built to California Title 24 and local zoning standards.

The ADU Pro® is a licensed ADU contractor in Chino, CA, serving Fontana and Southern California. Specializing exclusively in ADU construction, they offer detached ADUs, garage conversions, and granny flats with a lifetime transferable warranty.

South Land Remodeling is an LA-based ADU contractor with 20+ years of experience. They offer full-service ADU construction, garage conversions, room additions, and permit management across Los Angeles and the San Fernando Valley.

Landmark Building Inc is a Los Feliz-based general contractor serving Los Angeles neighborhoods including Hollywood Hills, Silverlake & Echo Park. They offer residential & light commercial remodeling, ADUs, garage conversions & free estimates.

Dobson Construction Inc. is a Bay Area ADU contractor with 16+ years of experience building home additions, detached ADUs, guest suites, and garage conversions. They handle design, permits, and construction for functional, value-adding residential spaces.

Willbii is a California ADU contractor specializing in granny flats, garage conversions, and in-law suites. They guide homeowners from consultation to construction, handling permits and design. ADUs can generate up to $5,000/month in rental income.

Milanco Building Group (MBG) is a certified general contracting company that offers extremely competitive prices while working under all the proper licenses and insurances.

We are a full turn-key company that performs projects in the commercial, residential, industrial markets and more. We have a management team that has 30+ years of experience to ensure a smooth project, such as full communication with the client, timely scheduling, great customer service and attention to details.

ADU's by Design is an Inland Empire ADU contractor serving Riverside & San Bernardino County. They offer full-service accessory dwelling unit design & construction, including detached ADUs, garage conversions, remodeling & architectural design.

Prefab vs. stick-built ADUs explained. Homeplex offers the Clever ADU, an HCD-certified modular unit built all-electric in a factory, saving 5–6 months vs. traditional construction. Costs vary based on site conditions.

Cornejos Builders offers ADU construction, garage conversions & home additions in LA & Orange County. 24 ADUs completed in 4 years. Costs range $80K–$250K. Licensed, insured, bonded. 1-year warranty included.

The ADU Guru is a full-service ADU contractor in Los Angeles & Orange County, specializing in garage conversions, detached ADUs & granny flats. With 100+ units completed, they offer $0 down, free 3D design & tenant placement.

New Birth Builders believes that a room addition or Garage Conversion is a great way to increase your home’s value and this new space can be used in a variety of ways. For most homeowners adding a room is less cost efficient and stressful than having to sell their home and move to a bigger home.

California Dream Builders specializes in ADU design and construction, offering end-to-end services including architectural design, permitting, and full construction management. They build detached ADUs, granny flats, in-law suites, and backyard cottages across California.

LPI Construction offers custom homes, ADU construction, and solar electric systems. Services cover hillside builds, detached/attached ADUs, garage conversions, and sustainable building practices, managing full project lifecycles from permits to completion.