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Custom Room Addition Contractors in the Bay Area
From seamless home extensions to beautifully designed room additions, Design & Construction by M&M enhances your living space with precision and care.
Beautiful Room Additions for Your Lifestyle
Whether you need extra space for a growing family, a new home office, or a private guest suite, Design & Construction by M&M provides complete room addition services tailored to your needs. From initial planning and permits to construction and final detailing, we handle every stage with precision and care.
Our experienced team ensures your new addition blends seamlessly with your existing home — matching materials, finishes, and architectural style for a natural, cohesive look. With high-quality craftsmanship and attention to detail, we create spaces that feel like they’ve always been part of your home.
ROOM ADDITION
Room Addition Services
Running out of space? Our room additions integrate seamlessly with your home — both structurally and stylistically — while increasing value and livability. Ideal for expanding bedrooms, creating home offices, or adding guest suites.
- Single Room Additions
- Master Suite Additions
- Second-Story Expansions
- Living Room / Family Room Extensions
- Garage-to-Living Conversions
- Structural & Foundation Work
- Finish Matching to Existing Home
your personal sanctuary
Design in 3 simple steps
Consult & Design
We start with a thorough consultation, creating custom designs tailored to your style and needs.
Expert Construction
Our skilled team manages every detail, from demolition to installation, ensuring precision and quality.
Enjoyment
We complete your project with meticulous attention, ensuring your complete satisfaction and a stunning garden
/ 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!”
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.
- 100 South Murphy Ave STE 200 Sunnyvale CA 94086
- +1 (650) 899-8968
- 50 California St, San Francisco, CA 94111
- +1 (650) 269-1376
- design@designbymm.pro
License number #1082131