Bay Area Design-Build Contractors
Since 2005, Design & Construction by M&M has helped Bay Area homeowners plan, permit, and build home additions, ADUs, custom homes, and major renovations with clear guidance, quality craftsmanship, and a lifetime labor warranty.
CSLB #1082131 | Licensed, Bonded & Insured | 100+ Projects Completed
About Design by M&M
Design & Construction by M&M is a licensed, bonded, and insured Bay Area design-build contractor helping homeowners expand, renovate, and reimagine their homes with confidence.
Since 2005, our team has completed more than 100 residential projects across the Bay Area, including home additions, ADUs, garage conversions, custom homes, full-home renovations, and larger remodeling projects. As a third-generation construction company, we bring hands-on building knowledge, careful planning, and long-term pride in craftsmanship to every project.
From the first consultation through design, permits, construction, and final walkthrough, our goal is to make complex home projects feel clear, organized, and well-managed.
CSLB License #1082131 | Bonded & Insured | Workers’ Compensation Coverage | Lifetime Labor Warranty
Why Choose Us
When homeowners choose Design & Construction by M&M, they are choosing a company with deep construction roots and a strong commitment to doing the job properly.
Our company is licensed by the California Contractors State License Board, bonded, and insured with liability and workers’ compensation coverage. We also stand behind our work with a lifetime warranty on labor, giving homeowners added peace of mind long after the project is complete.
Over the years, our work and customer service have helped us build strong ratings and recognition across platforms such as Angi, Thumbtack, Houzz, Yelp, and BuildZoom. We are also Google Guaranteed and recognized by BuildZoom as one of the top-rated contractors in California.
Interior Inspiration
We specialize in meaningful residential projects where planning, communication, and craftsmanship matter. That includes room additions, ADU construction, garage conversions, custom homes, whole-home remodeling, kitchen expansions, structural layout changes, and major renovations designed to improve how a home works for the people living in it.
As a design-build company, we help homeowners bring the design and construction process under one roof. That means our team can help guide the project from early ideas and feasibility through permitting, scheduling, material selections, construction, and final details.
We understand that a major home project can feel overwhelming. Our role is to help you understand what is possible, what needs to be planned carefully, and how to move forward with a clear process.