Professional ADU Builders You Can Trust
At MM General Builders Inc., led by Jose Martinez, we specialize in the design and construction of Accessory Dwelling Units (ADUs) throughout the North Bay. We understand the local building codes and zoning requirements necessary to turn your backyard into a functional living space.
Whether you need a detached guest house, a garage conversion, or an attached junior ADU, our team provides the Reliable, Honest, and Professional service needed to increase your property value.
Specialized ADU Solutions
Our team specializes in high-quality Accessory Dwelling Unit construction
Detached ADUs
Stand-alone backyard cottages perfect for rental income or guest houses.
Garage Conversions
Transform your underused garage into a modern, fully-equipped living studio.
Attached ADUs
Seamlessly integrated home extensions that provide private living quarters.
Junior ADUs (JADU)
Creative conversions of existing space within your home’s primary footprint.
Permit & Code Compliance
Expert guidance through the complex California ADU permitting process.
Utility Integration
Professional plumbing, electrical, and HVAC solutions for independent living units.
Serving the Entire Bay Area
MM General Builders Inc. is proud to offer professional construction and remodeling services across the entire North Bay and San Francisco Bay Area.
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Sonoma County
Santa Rosa, Petaluma, Sonoma, Rohnert Park, Windsor, Cotati and Healdsburg.
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Napa County
Napa, American Canyon, St. Helena, Calistoga, and Yountville
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Marin County
San Rafael, Novato, Mill Valley
Sausalito, Larkspur, Corte Madera, San Anselmo, Tiburon, Fairfax, Belvedere and Ross.
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The Greater Bay Area
San Francisco, Oakland (East Bay,
San Jose (South Bay/Silicon Valley)
Ready to Start Your Project?
Join our growing list of satisfied clients across the Bay Area.