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ADU Contractors near San Rafael, CA
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Sigura Construction, Inc.
1290 Reamwood Avenue, Sunnyvale, CA 94089 49.7 miles
Licensed
24 years in business
Sigura Construction, Inc. builds ADUs & garage conversions in Silicon Valley. Licensed, A+ BBB rated, Diamond Certified 18+ years. Serving Menlo Park, Palo Alto, Atherton & more. Free estimates available.
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Harmony Design & Development
5880 3rd Street, San Francisco, CA 94124 15.6 milesHarmony Design & Development builds custom ADUs across the San Francisco Bay Area, including detached units, garage conversions, and in-law suites. They manage permits, design, and construction from start to finish.
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Lion ADU Builders
456 Cavour Street, Oakland, CA 94618 18.7 milesLion ADU Builders is an Oakland ADU contractor offering detached ADUs, garage conversions, in-law suites, and custom builds. They manage design, permits, and construction, helping homeowners add space and property value across the Bay Area.
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Build My Casita
652 Gilman Street, Palo Alto, CA 94301 42.6 miles
Collins Remodeling
2651 Blanding Avenue, Alameda, CA 94501 22 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.
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DeBrus Construction LLC
820 Arguello Boulevard, San Francisco, CA 94118 15.3 miles
Licensed
DeBrus Construction LLC is a San Francisco general contractor specializing in seismic retrofits, foundation repair, ADU construction, and home remodeling. Led by Malcolm DeBrus, the company handles mandatory soft story retrofits, garage conversions, and full remodels with transparent pricing.
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Red White & Blue Construction
1080 Carol Lane, Lafayette, CA 94549 23.8 miles
Licensed
RWB Construction is a Lafayette, CA-based ADU contractor serving the Bay Area. They build detached ADUs, garage conversions, granny flats & in-law suites, managing design, permitting, and construction from start to finish.
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ADBC Architecture
460 Mandana Boulevard, Oakland, CA 94610 19.4 milesADBC Architecture completed an 800 SF detached ADU in East Bay, CA in 2025, designed for multigenerational living. Built with thermally modified wood and steel, the backyard cottage features high ceilings and large windows for a spacious feel.
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Perpetual Homes ADU
4115 Blackhawk Plaza Circle, Danville, CA 94506 35.3 miles
40 years in business
Prefab Specialist
Eco-Friendly
Perpetual Homes is a Northern California ADU builder with 40+ years of experience. They offer customizable prefab ADUs, a 10-step process, no site work markup, Energy Star insulation, a 7-year warranty, and an A+ BBB rating.read more
Kyvos Construction
430 Railroad Avenue, Pittsburg, CA 94565 34.5 miles
Luxury Builds
Kyvos Construction offers home remodeling & ADU construction in Concord, CA. Services include kitchen & bathroom renovations, room additions, garage conversions, detached & attached ADUs, granny flats, and in-law suites.
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Anura Design
367 Civic Drive, Pleasant Hill, CA 94523 24.5 miles
Luxury Builds
Anura Design specializes in ADU design, offering styles from modern farmhouse and contemporary steel to Mediterranean stucco. Their interiors feature open-concept layouts, natural wood tones, and refined finishes tailored to compact, functional living spaces.
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Barzel Builders
4039 Transport Street, Palo Alto, CA 94303 45.3 miles
Wellmade
2371 Verna Court, San Leandro, CA 94577 27.4 miles
Licensed
5 years in business
Prefab Specialist
Wellmade is a California prefab ADU builder specializing in panelized accessory dwelling units. Founded in 2020, they've completed 200+ projects, reducing construction waste by 85%. Serving CA, OR, and WA with all-inclusive pricing.
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Tiny House Basics
5433 Clayton Road, Clayton, CA 94517 31.2 milesTiny House Basics designs custom tiny house trailers with insulated floors, no thermal bridging, and build-ready delivery. Models range from 10–50ft, up to 12ft wide, in bumper pull or gooseneck styles. Lifetime consulting included.
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Other cities in California
- North Highlands
- Sacramento
- North Hollywood
- Agoura Hills
- Encino
- Los Angeles
- Tarzana
- Long Beach
- Hollywood
- Glendale
- Valley Village
- Pasadena
- Burbank
- Downey
- Beverly Hills
What you need to know
Building ADUs in San Rafael: Navigating Marin County's Unique Landscape
San Rafael, the county seat of Marin County, presents a distinctive set of opportunities and challenges for homeowners looking to build an Accessory Dwelling Unit (ADU). Known for its hillside terrain, historic neighborhoods, and strict environmental protections, San Rafael requires experienced ADU contractors who understand the city's specific zoning codes, fire safety requirements, and design standards. With the Bay Area's ongoing housing shortage, ADUs in San Rafael have become an increasingly popular solution for homeowners seeking rental income or multigenerational living arrangements.
San Rafael ADU Regulations and Zoning Requirements
San Rafael follows California state ADU law while also enforcing its own local ordinances. Homeowners and ADU contractors in San Rafael must navigate regulations set by both the City of San Rafael Community Development Department and, in some cases, Marin County guidelines. Key regulatory considerations include:
- Maximum ADU size: Detached ADUs can be up to 1,200 square feet, while Junior ADUs (JADUs) are capped at 500 square feet.
- Setback requirements: A minimum 4-foot rear and side yard setback is typically required for new detached ADUs.
- Height limits: Detached ADUs are generally limited to 16 feet in height, though this can vary by zone.
- Fire safety compliance: Given San Rafael's proximity to high fire hazard severity zones, ADU contractors must adhere to strict fire-resistant construction materials and defensible space requirements.
- Historic district considerations: Neighborhoods like the Canal District and areas near downtown may have additional design review requirements.
Why Hire a Local ADU Contractor in San Rafael?
Working with a local ADU contractor in San Rafael is essential for a smooth permitting and construction process. Local contractors are familiar with the City of San Rafael's Building Division permit process, plan check timelines, and the specific inspectors who review ADU projects. They also understand the challenges of building on Marin County's hilly, sometimes unstable terrain, which may require additional geotechnical assessments and specialized foundation work.
Types of ADUs Popular in San Rafael
San Rafael homeowners commonly pursue several types of ADU projects, depending on their property layout and goals:
- Garage Conversion ADUs: Converting existing attached or detached garages is a cost-effective option popular in San Rafael's older residential neighborhoods.
- Detached New Construction ADUs: Ideal for larger lots, these standalone units offer maximum privacy for tenants or family members.
- Junior ADUs (JADUs): Created within the existing footprint of a single-family home, JADUs are a budget-friendly option with a streamlined permitting process.
Start Your San Rafael ADU Project Today
Whether you're looking to add rental income, house a family member, or increase your property value, partnering with a qualified ADU contractor in San Rafael, California is the first step. Make sure your contractor is licensed by the California Contractors State License Board (CSLB), carries proper insurance, and has verifiable experience with ADU projects in Marin County. A well-built ADU in San Rafael can be a long-term investment in one of the Bay Area's most desirable communities.