Custom ADU Builds & Garage Conversions Across the Bay Area

From modern accessory dwelling unit designs to complete garage conversions, we create functional, stylish ADU living spaces that expand your home’s value and flexibility.

Accessory Dwelling Units & Garage Conversions Designed for Bay Area Living

Create more space and increase property value with our modern ADU designs and custom garage conversions. As trusted ADU builders, we transform underused areas into private, fully functional living spaces tailored to your lifestyle.

ADU GARAGE

Custom-Built ADU Services – Designed for How You Live

At Design By M&M, we provide complete ADU design and construction services—tailored to your needs, property layout, and long-term goals. Whether you’re building a detached accessory dwelling unit, converting a garage, or expanding with a junior ADU, we handle it all from the ground up. Unlike many ADU builders who rely on prefab units, we construct every project on-site using high-quality materials and a true custom approach.

From ADU bathroom and kitchen design to maximizing living space and ensuring compliance with city regulations, our team ensures every detail is handled. We’re not just building space—we’re building long-term value for your property.

The Independent Suite

Design in 3 simple steps

01

Consult & Design

We start with a thorough consultation, creating custom designs tailored to your style and needs.

02

Expert Construction

Our skilled team manages every detail, from demolition to installation, ensuring precision and quality.

03

Enjoyment

We complete your project with meticulous attention, ensuring your complete satisfaction and a stunning new ADU.

/ FAQ

Frequently Asked Questions

If you don’t see your question answered here, please don’t hesitate to contact us directly – we’re always happy to help!”

An Accessory Dwelling Unit (ADU) is a self-contained living space built on the same lot as your primary home. A garage conversion is one type of ADU, where an existing garage is transformed into a fully livable unit with its own entrance, plumbing, and electrical systems.

Absolutely. A professionally built garage conversion ADU adds livable square footage and can significantly increase your property value. It also opens up rental income opportunities and multi-generational living solutions.

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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.

License number #1082131

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