Second Dwellings

100 Higgins Canyon Road, Half Moon Bay, CA 94019 31.7 miles

9 Builders

9 Builders is a Bay Area ADU contractor offering full-service design, permits & construction. Specializing in detached ADUs, garage conversions & additions, costs range $150K–$350K, taking 8–14 months to complete.

LRL Builders, Inc.

1661 Botelho Drive, Walnut Creek, CA 94596 42.6 miles

Licensed Eco-Friendly

LRL Builders, Inc. is a licensed ADU contractor in Walnut Creek, CA, specializing in detached, attached, garage conversion, and junior ADUs. They handle design, permitting, and construction, serving Walnut Creek and surrounding Bay Area communities.

Apex Homes

10275 North De Anza Boulevard, Cupertino, CA 95014 10.3 miles

Licensed Eco-Friendly

SVW Designs

1106 Eagle Drive, Salinas, CA 93905 44.3 miles

Eco-Friendly

SVW Designs offers expert framing, electrical, and plumbing services for ADUs, garage conversions, and backyard cottages. Services include structural framing, smart home electrical systems, and PEX plumbing—all code-compliant.

Dwelling Lab

21 El Caminito, Walnut Creek, CA 94598 43.1 miles

Dwelling Lab is an Oakland-based ADU design firm offering full-service planning, schematic design, construction drawings, permitting, and construction oversight for detached ADUs, attached additions, and garage conversions.

Mendez and Son's Construction Inc

39647 Iolani Ct., Fremont, CA 94538 17.6 miles

Mendez and Son's Construction is a Bay Area ADU contractor offering design-build services in Palo Alto, Mountain View, San Mateo & Walnut Creek. They handle detached ADUs, garage conversions & JADUs, managing permits to final inspection.

Home WiP Construction Concierge

171 Main St 261, Los Altos, CA 15.7 miles

Atra Construction

San Jose, CA 95120 5.9 miles

Eco-Friendly

Atra Construction is a Bay Area ADU contractor offering full-service design and build. They handle permits, planning, and construction management. Floor plans range from 240 sq ft studios to 1,200 sq ft three-bedroom units.

Inspired ADUs

1940 Union Street, Oakland, CA 94607 42.8 miles

Licensed 20 years in business

Inspired ADUs is an architect-led ADU design firm serving the Bay Area and Southern California. With 20+ years of experience and 250+ ADUs permitted, they offer custom, panelized, and modular ADU solutions, plus interior design and SB9 lot split services.

Type Five

1336 Channing Way, Berkeley, CA 94702 45.6 miles

Licensed Prefab Specialist Luxury Builds

Type Five is a Berkeley, CA-based ADU builder offering custom backyard cottages, granny flats & in-law suites. They combine modular design, transparent pricing & streamlined construction for stress-free, high-quality detached ADUs built to last.

Collins Remodeling

2651 Blanding Avenue, Alameda, CA 94501 38.6 miles

Licensed

Collins Remodeling is a licensed ADU contractor in Alameda, CA, specializing in detached ADUs, garage conversions, JADUs, and granny flats. They manage permitting, design, and construction, helping homeowners add value and rental income.

Cajigas Construction Inc.

566 N Grant Ave, San Joaquin, CA 95336 49.3 miles

Licensed 35 years in business

Cajigas Construction Inc. is a licensed ADU builder with 35+ years of experience serving Sacramento, Stanislaus, and San Joaquin Counties. Services include detached ADUs, JADUs, garage conversions, new home construction, and REO property services.

Keller Williams Palo Alto

2825 El Camino Real, Palo Alto, CA 94306 18.2 miles

30 years in business Eco-Friendly

Acton ADU is a Bay Area ADU contractor founded by Stan Acton with 30+ years of experience. They offer full-service ADU design, construction, garage conversions, and permitting across San Jose and the broader Bay Area.

SFBay ADU

111 North Market Street, San Jose, CA 95113 3.6 miles

Licensed 25 years in business

SFBay ADU is a Bay Area ADU contractor offering full-service design, permitting, and construction. Specializing in 600–1,200 sq ft units, they offer studio, 2-bed, garden cottage, and in-law suite options, with projects completed in as little as 6 months.

Other cities in California

What you need to know

Building ADUs in San Jose: Navigating Silicon Valley's Housing Crisis

San Jose is the largest city in Northern California and sits at the heart of Silicon Valley, where skyrocketing housing costs have made Accessory Dwelling Units (ADUs) one of the most practical solutions for homeowners looking to add rental income or housing for family members. With the median home price consistently among the highest in the nation, hiring experienced ADU contractors in San Jose has become increasingly popular as residents look to maximize their property's value and contribute to the city's housing supply goals.

San Jose ADU Regulations and Zoning Requirements

San Jose follows California state ADU laws while also maintaining its own local guidelines. Working with a knowledgeable ADU contractor in San Jose is essential to navigating these rules successfully. Key regulations homeowners should be aware of include:

Types of ADUs San Jose Contractors Commonly Build

Experienced ADU builders in San Jose are well-versed in constructing a variety of unit types to suit different lot sizes and homeowner needs. The most common types include:

Why Hiring a Local San Jose ADU Contractor Matters

Choosing a local ADU contractor in San Jose means working with professionals who understand the city's specific permitting process through the San Jose Department of Planning, Building and Code Enforcement (PBCE). Local contractors are familiar with the city's pre-approved ADU plan program, which can significantly speed up the permitting timeline. They also understand the unique soil conditions, seismic requirements, and utility connection protocols specific to the South Bay Area.

Whether you're looking to generate rental income, house extended family, or simply increase your property value, partnering with a qualified San Jose ADU contractor is the smartest first step toward a successful build.

ADU Contractors near San Jose, CA