Room Additions in Sunnyvale, CA
Design by M&M helps Sunnyvale homeowners expand their living space through carefully planned additions — managing design, permits, and construction from concept to completion.
Home Additions
Bedroom Additions
Add more sleeping capacity to the family or guests.
Dining Room Additions
Increase or develop classy eating and entertaining areas.
Family Room Additions
Make living spaces in the middle comfortable and cohesive.
Second Story Additions
Add a second story to maximize your living space
Home Office Additions
Special work areas to get work done.
Living Room Additions
More welcoming spaces to have in day-to-day life.
Bathroom Additions
Additional bathrooms as an addition to enhance convenience.
Kitchen Additions
increases or redesigns kitchen area to cook and hold meetings.
Mudroom Additions
These are practical entryways that are used to control clutter and storage.
Master suite Additions
Private, lavish retreats combined with your house.
Sunroom Additions
Well-lit areas of recreation and relaxation.
Laundry Room Additions
Roomy and neat areas to do laundry.
Home Additions
Design by M&M helps Sunnyvale homeowners create more functional living space through carefully planned room additions. As a design-build contractor serving Sunnyvale, Santa Clara County, and the greater Bay Area, we manage the entire process — from early design and feasibility through permitting, construction, and final walkthrough.
An addition lets you stay in the neighborhood, school district, and community you’ve invested in — while gaining the space your household actually needs. As an experienced room addition contractor, Design by M&M helps homeowners expand your living space in the way that fits the property, the structure, and the budget best.
Common addition projects we take on in Sunnyvale include:
- Rear additions — extending the back of the home for a larger kitchen, family room, or primary suite
- Second story additions — doubling usable space on a standard Sunnyvale lot while preserving the yard
- Side additions — expanding into available side yard space where setbacks allow
- Primary suite and family room additions — creating the spaces growing households need most
Accessory Dwelling Units (ADU)
ADUs are increasingly popular across Sunnyvale — for aging parents, adult children saving for their own home, visiting family, or long-term rental income. As an experienced ADU builder in Sunnyvale, Design by M&M guides homeowners through every stage, from confirming what the lot can legally support to final inspection.
We design and build all types of ADUs, including:
- Detached ADUs — standalone backyard units with their own entrance and utilities
- Attached ADUs — additions connected to the main home with independent living space
- Junior ADUs and in-law suites — smaller conversions within the existing home, ideal for multigenerational living
Before starting an ADU, homeowners need to understand where utilities will connect, how the unit will fit on the lot, and what local and state ADU rules allow. We handle that groundwork so the project moves forward with clarity instead of guesswork.
Garage Conversions
We specialize in turning underused garages into comfortable, fully permitted living space. Serving Sunnyvale and nearby communities, our team helps homeowners expand what their property can do — without changing the footprint of the home.
Popular garage conversion projects include:
- Converting a garage to an ADU for rental income or family use
- Creating a home office or studio for remote work
- Adding a guest suite or flexible bonus room
Garage conversions often look simple from the outside, but they involve real construction and compliance work: insulation, electrical upgrades, plumbing (for ADU conversions), egress requirements, and city permitting. We manage those details from the start, so the finished space is safe, legal, and built to last.
Design Build
Design by M&M is a design build contractor, which means one team manages your project from concept to completion. Instead of coordinating separate architects, designers, engineers, and builders, you work with a single team responsible for the entire outcome.
Our design-build approach includes:
- Consultation and property review
- Custom designs shaped around your goals, lot, and budget
- Architectural planning and engineering coordination
- Permitting and city approvals
- Construction scheduling and project management
- The build phase, through final walkthrough
This approach keeps design decisions and construction realities connected. Thoughtful design means little if it can’t be built within your budget — and quality construction depends on planning that was realistic from day one. When one team owns both, the process stays clear and accountable.
Home Remodeling
As a remodeling company in Sunnyvale, we focus on larger renovation projects that improve how a home functions — not just how it looks. Many Sunnyvale homes still carry their original layouts: galley kitchens, closed-off dining rooms, and living spaces that don’t connect. Our home remodeling services help homeowners open up those floor plans, modernize aging systems, and improve flow throughout the home.
Our remodeling services include:
- Whole house renovation — comprehensive updates to layout, systems, and finishes
- Kitchen remodels — typically as part of larger layout improvements or expansions
- Major renovations — reworking floor plans, removing walls, and modernizing older homes
- Renovation paired with additions — improving the existing home while adding square footage
Our remodeling process follows the same design-build structure as our additions and ADU work: feasibility first, then design, budget alignment, permitting, and construction — all managed by one team with clear communication throughout.
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 new kitchen.
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!”