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Home Addition Contractor in Palo Alto & the Bay Area
Design by M&M helps Palo Alto homeowners create more functional living space through carefully planned home additions, ADU’s, custom homes and large scale remodels — from early design and permitting through construction and the final walkthrough.
Our Services
As a Palo Alto design-build company, we help homeowners plan and build meaningful additions to their property — from home and room additions to ADUs, garage conversions, and ground-up custom homes. Our team manages the full process under one roof, from early design and permitting through construction and final walkthrough. Explore our services below.
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Why Design and Construction by M&M?
Design & Construction by M&M is a licensed general contractor based in Palo Alto, proudly serving the South Bay, San Francisco, the Peninsula, and surrounding Bay Area communities. We specialize in custom home construction, home remodeling, full renovations, and high-quality additions, including ADU construction, garage conversions, basement remodeling, kitchen remodeling, and bathroom remodeling services. Our team combines strategic design expertise with precise construction execution to deliver functional, modern, and personalized living spaces. Whether you’re planning a contemporary kitchen remodel, a complete home renovation, or a seamless home addition, we are committed to superior craftsmanship, dependable project delivery, and long-lasting results.
/ DESIGN & CONSTRUCTION BY M&M
Custom Homes, Additions & Design-Build Construction in Palo Alto
Design and Construction by M&M is a licensed design-build general contractor in Palo Alto, serving homeowners across the Bay Area. We specialize in the larger residential projects where planning and craftsmanship matter most — home and room additions, ADUs, garage conversions, custom home builds, and full-scale remodeling. By combining design insight with build precision under one roof, we create living spaces that are tailored to your property, your goals, and how you actually live. We don’t just build — we manage the full process from design through construction, and deliver craftsmanship that lasts.
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Projects Completed
Consultation & Planning
We begin with a detailed consultation to understand your vision, goals, and priorities. This includes a walkthrough, scope discussion, and budget alignment to set the foundation for a smooth project.
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Design & Material Selection
Once the scope is defined, our team guides you through the design process, from layout planning to selecting finishes, fixtures, and materials that reflect your style and functional needs.
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Permits, Scheduling & Pre-Construction
We manage all permitting and coordinate timelines, vendors, and site prep so you’re never left in the dark. Our goal is a seamless pre-build phase with clear expectations and zero surprises.
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Construction & Final Delivery
Our skilled crew handles every aspect of the build with precision, safety, and professionalism. After completion, we conduct a thorough walkthrough to ensure everything meets our standards, and yours.
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Our Featured Projects
Our work speaks for itself. These projects highlight the quality, planning, and craftsmanship we bring to every build — from ADUs and garage conversions in Palo Alto to home additions and custom homes across the Bay Area. Explore what sets our design-build approach apart.
FAQ
What does Design by M&M do?
Design by M&M is a design-build general contractor in Palo Alto serving homeowners across the Bay Area. We handle both the design and the construction of larger residential projects under one roof — home and room additions, ADUs, garage conversions, custom homes, and full-scale renovations — guiding you from the first consultation through the final walkthrough.
What areas do you serve?
We’re based in Palo Alto with an additional office in San Francisco – and work with homeowners throughout the Peninsula, South Bay, San Francisco, and surrounding Bay Area communities, including Menlo Park, Atherton, Mountain View, Los Altos, Redwood City, and San Mateo.
What types of projects do you specialize in?
We focus on substantial residential projects where planning, permitting, and craftsmanship matter: home additions and room additions, ADU construction, garage conversions, custom home builds, and major whole-home renovations. These are the projects where having design and construction managed by one team makes the biggest difference.
What is design-build, and why does it matter?
Design-build means one team handles your project from design through construction, instead of you hiring a separate designer, architect, and contractor and coordinating between them. It keeps your design, budget, permitting, and build aligned from day one — which usually means fewer surprises, clearer communication, and a smoother project.
What kinds of projects do you typically not take on?
Our process is built around larger, design-driven projects, so we’re usually not the right fit for small handyman tasks, cosmetic-only updates, or minor standalone repairs. If you’re planning a meaningful investment in your home — adding space, reworking a layout, or building something new — that’s where we do our best work.
Are you licensed?
Yes. Design by M&M is a fully licensed general contractor (License #1082131).
What does the process look like?
We start with a consultation and property walkthrough to understand your goals and budget. From there we move through design and material selection, permitting and scheduling, and finally construction — ending with a walkthrough to make sure everything meets your standards and ours.
Do you handle permits?
Yes. We manage permitting and city approvals as part of the project, coordinating timelines, inspections, and paperwork so you’re not navigating the process on your own.
What should I have ready before contacting you?
Just a general sense of what you’re hoping to accomplish — more space, a better layout, an ADU, a new home — along with a rough budget range and timeline if you have one. We’ll help fill in the rest, including what your property and local permitting will realistically allow.
We love design
Hear from our satisfied clients: real stories of transformed homes.
Start Your Project with Us
Ready to build, remodel, or expand? Fill out the form and our team will be in touch to discuss next steps.
Straightforward, professional, and on your terms.
- 2100 Geng Rd Ste 210 Palo Alto, CA 94303
- +1 (650) 899-8968
- 50 California St, San Francisco, CA 94111
- +1 (650) 269-1376
- design@designbymm.pro
License number #1082131