ADU Contractors near San Carlos, CA

Barzel Builders

4039 Transport Street, Palo Alto, CA 94303 10.5 miles

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SFBay ADU

111 North Market Street, San Jose, CA 95113 23.3 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.

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Element Homes

188 Acalanes Drive, Sunnyvale, CA 94086 15.5 miles

Element Homes is a California ADU contractor offering full-service design, permitting, and construction. They build detached ADUs, garage conversions, and in-law suites across the Bay Area, with in-house teams, warranties, and free estimates.

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Home WiP Construction Concierge

171 Main St 261, Los Altos, CA 11.7 miles

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Bayside Builders Group

1151 Harbor Bay Parkway, Alameda, CA 94502 15.8 miles

Licensed 25 years in business

Bayside Builders Group is a licensed Bay Area ADU contractor with 25+ years of experience. Services include detached ADUs, garage conversions, and in-law suites. Serving Oakland, San Jose, San Francisco, and surrounding counties.

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AKD Homes

3518 Arden Rd, Hayward, CA 94545 12 miles

20 years in business

AKD Homes is a Bay Area ADU contractor with 20+ years of experience. They offer full-service ADU design and build, including detached ADUs, custom designs, and conversions from Berkeley to San Jose.

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AKD Homes

3518 Arden Road, Hayward, CA 94545 12 miles

20 years in business

AKD Homes is a SF Bay Area ADU contractor with 20+ years of experience. They offer full-service ADU design, permits, and construction, including detached ADUs, granny flats, and custom builds ranging from 400–750 sq. ft.

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Home by Tom

1990 North California Boulevard, Walnut Creek, CA 94596 30.3 miles

Licensed 21 years in business

Home by Tom is a Bay Area ADU contractor with 21+ years of experience serving Walnut Creek. They build detached ADUs, attached ADUs, and garage conversions, managing design, permits, and construction for rental income or multi-generational living.

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American Builders

1105 Grand Teton Drive, Pacifica, CA 94044 12.7 miles

American Builders is a San Francisco ADU contractor specializing in garage conversions, detached units, in-law suites & basement conversions. They handle permits, zoning, and deliver code-compliant accessory dwelling units on time and on budget.

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Valley Home Builders inc.

3466 Edward Avenue, Santa Clara, CA 95054 20.8 miles

Licensed 19 years in business Eco-Friendly

Valley Home Builders Inc. is a Silicon Valley design-build contractor serving Santa Clara & San Mateo Counties. Founded in 2005, they specialize in kitchen remodeling, ADU construction, and home renovations across San Jose, San Mateo & beyond.

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Vought Construction

734 Gilman Street, Berkeley, CA 94710 26.4 miles

Imagine the possibilities that a beautifully crafted ADU (accessory dwelling unit) brings to your Berkeley or Bay Area property. Whether it’s creating a cozy retreat for guests, a comfortable living space for family members, or an additional source of income through rental, design your ADU to enrich your life.

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Geico Builders

1901 Harrison Street, Oakland, CA 94612 21.3 miles

Geico Builders offers ADU services including detached ADUs, attached ADUs, Junior ADUs, garage conversions, and home additions. Ideal for rental income, family housing, or maximizing space on your existing property.

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亞華建築YAHUA CONSTRUCTION

650Bfremont Ave, Los Altos, CA 94024 11.6 miles

Licensed 20 years in business Eco-Friendly

YAHUA Construction Inc. is a California-based licensed general contractor with 20+ years of experience. Specializing in ADUs, remodeling, MEP, roofing, and more, they serve the Bay Area with quality, sustainable construction.

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UDA ADU

Palm Avenue, Los Altos, CA 94022 12.1 miles

UDA ADU is a California ADU contractor specializing in detached ADUs, garage conversions, JADUs, and in-law suites. They handle design, permitting, and construction, offering homeowners a streamlined, full-service ADU building experience.

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ProStruct Engineering

450 Folsom Street, #1502, San Francisco, CA 94105 21.5 miles

ProStruct Engineering offers ADU structural engineering services across California, providing permit-ready plans and calculations for detached ADUs, garage conversions, granny flats, and more, with a 2–3 week turnaround.

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Other cities in California

• Agoura Hills
• Alameda
• Albany
• Anaheim
• Antioch
• Anza
• Aptos
• Arcata
• Atascadero
• Bakersfield
• Banning
• Bellflower
• Berkeley
• Beverly Hills
• Bonita

What you need to know

Building ADUs in San Carlos: A City That Embraces Smart Growth

San Carlos, California, often called the "City of Good Living," is a vibrant Peninsula community in San Mateo County that has embraced accessory dwelling units (ADUs) as a practical solution to the Bay Area's ongoing housing challenges. With its desirable location between San Francisco and Silicon Valley, San Carlos has seen strong demand for ADUs as homeowners look to add rental income, house family members, or increase property value. Working with experienced ADU contractors in San Carlos is essential to navigating the city's specific planning requirements and making the most of your investment.

San Carlos ADU Regulations and Permitting Requirements

San Carlos follows California state ADU law while also maintaining its own local guidelines through the Community Development Department. Homeowners and ADU builders in San Carlos must be aware of the following key regulations:

• Detached ADUs can be up to 1,200 square feet, depending on lot size and zoning.
• Attached ADUs are generally limited to 50% of the primary dwelling's square footage.
• Junior ADUs (JADUs) are capped at 500 square feet and must be within the existing structure.
• Setback requirements typically require a minimum of 4 feet from rear and side property lines for new detached ADUs.
• ADUs must comply with San Mateo County's fire safety standards, which may require sprinkler systems in certain cases.
• Owner-occupancy requirements were suspended under California state law, allowing more flexibility for investors and homeowners alike.

Why Hire a Local ADU Contractor in San Carlos?

Hiring a licensed ADU contractor familiar with San Carlos is one of the most important decisions you'll make during your project. Local contractors understand the nuances of the city's permitting process, know how to work efficiently with the San Carlos Building Division, and are familiar with the architectural styles common in neighborhoods like White Oaks, Howard Park, and Beverly Terrace. A knowledgeable contractor can help streamline approvals and avoid costly delays.

Types of ADUs Popular in San Carlos

Given the typical lot sizes and existing home styles in San Carlos, the most popular ADU types include:

1. Garage conversions – Many San Carlos homes have detached garages that are ideal candidates for conversion.
2. Detached backyard cottages – A popular choice for homeowners with larger lots.
3. Basement conversions – Some older homes in San Carlos have underutilized basement space perfect for ADU development.

Start Your San Carlos ADU Project Today

Whether you're looking to create a rental unit, a home office, or a space for aging parents, working with a qualified ADU contractor in San Carlos, CA ensures your project meets all local and state requirements. With rising property values and strong rental demand in the Peninsula, an ADU is one of the smartest investments a San Carlos homeowner can make. Reach out to a trusted local ADU specialist today to get started.