Snow Construction

6647 Orion Avenue, Los Angeles, CA 91406 26.6 miles

Snow Construction is an LA-based ADU and granny flat builder offering planning, design, and construction services. They help homeowners add secondary units, navigate permits, and understand parking rules under California's 2017 ADU legislation.

Socal Upgrades ADU

1288 North Verdugo Road, Glendale, CA 91206 16.8 miles

Licensed Free Consultation In-House Architect

SoCal Upgrades is a full-service ADU contractor in Los Angeles & Glendale, specializing in detached ADUs, garage conversions, JADUs & granny flats. They handle design, permits, construction & financing for a seamless, turnkey experience.read more

Daniel's Development Group

22025 San Miguel Street, Woodland Hills, CA 91364 30.6 miles

Daniel's Development Group builds ADUs in Los Angeles, including attached, detached, garage conversions & JADUs. Permits cost ~$6,000. Rental income averages $2,500/month. Free consultations available.

Willbii

2158 Huntington Drive, San Marino, CA 91108 13.2 miles

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.

Cornejos Builders

8909 Elmont Avenue, Downey, CA 90240 2 miles

Licensed 4 years in business Luxury Builds

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.

Romano Builders

14407 Gilmore Street, Van Nuys, CA 91401 25 miles

Eco-Friendly

Romano Builders specializes in ADU construction in Los Angeles, offering detached, attached, garage conversion, and junior ADUs. Costs range $300–$600/sq ft, with rental income potential of $1,500–$4,000+/month.

Other cities in California

What you need to know

Searching for top Junior ADU (JADU) ADU Contractors in Downey, California? Our directory highlights trusted local professionals who specialize in designing and building accessory dwelling units (ADUs).

Working with a qualified Junior ADU (JADU) ADU Contractor in Downey ensures your ADU project meets local building codes, zoning laws, and permit requirements. Whether you're planning a detached ADU, garage conversion, or backyard cottage, experienced Junior ADU (JADU) professionals can guide you through every step.

Downey homeowners are increasingly investing in ADUs to create additional living space, generate rental income, or support multigenerational living. The Junior ADU (JADU) experts featured here bring local expertise and proven experience to help make your project a success.

Browse our listings to find the best Junior ADU (JADU) ADU Contractors in Downey, California, and get started today.

Junior ADU (JADU) near Downey, CA