Design-Build Services in the Bay Area
Design & Construction by M&M is a design build contractor serving homeowners across The Bay Area, including Palo Alto, the Peninsula, and the South Bay. We bring design, interior design, permitting, and construction together into a single guided process — so you have one team from your first idea to your final walkthrough.
Why Choose a Design-Build Contractor
In a traditional project, you hire someone to create architectural plans, then go find a separate contractor to build them. If the finished design turns out to cost far more than your budget allows, you’re often back to square one. A design-build contractor keeps design and construction under one all-in-one team, which keeps your project grounded and moving forward.
Here’s why many homeowners prefer this approach:
- One team, start to finish. You don’t have to coordinate between an architect, a designer, and a builder who each point at the other when something goes wrong.
- Custom designs that fit your budget. Because our designers and builders work side by side, we can price the work as we develop your custom designs — no expensive surprises after the plans are done.
- A more efficient timeline. Overlapping design and construction planning is more efficient and saves time compared to finishing a full set of plans and only then starting the bidding process.
- A streamlined, single process. One contract, one schedule, one streamlined point of contact responsible for the outcome.
The result is a project that stays realistic, communicative, and built around what you actually want to accomplish.
Room Additions
Sometimes the home you love just needs to be a little bigger. A well-planned addition can give a growing family the room it needs without leaving the neighborhood — a meaningful advantage in an area where the median home price in Palo Alto has recently sat near $3.5 million, well above the wider Bay Area. For many homeowners, expanding is more practical than moving.
As a design build firm, we plan additions so the new space feels like a natural part of your home, not an afterthought bolted onto the side. From matching your roofline and finishes to reworking how rooms connect, our goal is a seamless transition between the original structure and the new square footage.
Common room additions include:
- Primary suite additions
- Second-story additions (building up when the lot is tight)
- Family room and living space additions
- Kitchen expansions as part of a larger addition
- Full-home expansion projects
Because we handle both design and construction, we can tell you early whether it makes more sense to build up, build out, or take a different approach entirely — before you’ve invested in plans that may not fit your lot.
ADU Construction
An Accessory Dwelling Unit (ADU) is a separate, self-contained living space on your property — with its own kitchen, bathroom, and entrance. ADUs have become one of the most practical ways for Bay Area homeowners to add flexible space, and demand across California reflects that: state housing data shows the number of permitted ADUs jumped more than 300% between 2016 and 2022, and California accounts for roughly a third of all ADU permits in the country.
As an experienced ADU builder, we create custom designs shaped around your lot, your goals, and how you plan to use the space. ADUs work well for a range of situations:
- Detached backyard units for privacy and flexibility
- Attached ADUs connected to the existing home
- Garage conversions that repurpose space you already have
- Junior ADUs and in-law suites for multigenerational living
- Rental or guest units that can generate rental income
Every ADU starts with understanding what your property can legally support. Setback rules, utility connections, lot size, and city permits all shape what’s possible — and we guide you through each of those steps so the project is planned correctly before construction begins.
Home Remodeling
A thoughtful remodel can modernize an older Bay Area home, improve how it functions day to day, and add long-term value. We focus on major remodeling projects where design, structure, and layout all come into play — not quick cosmetic touch-ups.
Our remodeling work includes:
- Whole house remodels that reconfigure the layout and flow of the entire home
- Kitchen and bathroom remodels as part of a larger renovation or addition
- Opening up closed-off floor plans to create brighter, more connected living spaces
- Updating older Palo Alto homes and surrounding-area properties with modern systems and finishes
Whether you’re renovating before adding square footage or reworking the whole home at once, we approach home improvement as a strategic upgrade to how your home lives, not just how it looks. Because we manage design and construction together, structural changes, finishes, and permitting stay coordinated from the first meeting to the last.
Garage Conversions
If you rarely park in your garage, that space may be the easiest square footage to reclaim. When you convert your garage, you can turn an underused area into a home office, guest suite, family room, or income-generating ADU — often faster and more affordably than building new from the ground up, because the foundation and framing are already in place.
We also design above-garage additions, adding a second story over the garage to create bedrooms, a home office, or a private suite without expanding your home’s footprint.
Every conversion begins with practical designs built around your existing structure, your goals, and local requirements. Serving The Bay Area, we handle the planning, permitting, and construction so the finished space is fully livable, code-compliant, and a natural extension of your home.
