Top 10 Home Addition Companies in Cupertino, CA
From ground-floor master suites to full second-story builds, find the right design-build team to handle your specific expansion needs.
Cupertino homeowners have a particular problem: the location is hard to leave and impossible to replicate. The schools, the proximity to major employers, the neighborhoods, all of it makes moving feel like a losing trade. When a home stops fitting the family inside it, the practical answer for most people here is to build out rather than move on.
Home additions in Cupertino range from a ground-floor master suite or room expansion to full second-story builds, and the city has its own set of zoning ordinances, FAR limits, and permit procedures that can slow down or derail a poorly managed project.
The ten companies below are contractors who either operate directly in Cupertino or explicitly include it in their documented service area, and who build home additions as a defined part of their work.
1. MA Legacy Remodeling
When it comes to home additions in Cupertino, we put ourselves at the top of this list because we built our practice around exactly this type of work. MA Legacy Remodeling, operating as MA Legacy ADU Construction & Remodeling, focuses on large-scale residential builds, with home additions and ADU construction forming the core of what we do across Silicon Valley.
We take a design-build approach, which means we carry the project from initial site assessment through permits, structural work, and final inspection without handing it off between teams. Our familiarity with Cupertino’s building department, setback requirements, and zoning rules translates directly into fewer delays and cleaner permit approvals for our clients.
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Room additions, second-story builds, in-law suites, master suite expansions, we handle all of it. If you’re planning to add square footage to a Cupertino property and want a team that treats it as a serious construction project from day one, view our work and get started here. Call us at (408) 545-8413 or contact us here.
2. Greenberg Construction
Greenberg Construction is a Palo Alto-based design-build firm with Cupertino explicitly in their service territory. Founded by Maor Greenberg and operating under CA License #996834, the company handles everything in-house, architecture, structural engineering, permits, and construction, which keeps projects moving without the coordination gaps that come from hiring separately. They carry eight Best of Houzz Service awards, an Inc. 5000 designation, and a BuildZoom score in the top 1% statewide.
For home additions specifically, Greenberg works on room additions, second-story builds, full home expansions, and major renovations. Their Palo Alto Design Gallery gives clients hands-on access to materials before selections are finalized.
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3. Done Right Builders and Remodeling
Done Right Builders and Remodeling is a Cupertino-rooted general contractor with over 15 years of local experience and a specific home addition offering that covers bump-out expansions, room additions, second-story builds, and in-law suite construction. The team handles permit acquisition and works with an in-house designer, keeping the design and construction under one contract rather than splitting it across vendors.
Their project managers stay as the homeowner’s single point of contact through completion, and their portfolio includes recorded permits for additions ranging from bedroom-and-bath suites to open-concept reconfigurations that involved structural wall removal.
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4. W&W Builders Group
W&W Builders Group is a Santa Clara-based design-build firm operating since 2002, with Cupertino listed in their service area. They run a family-owned operation led by Gil and Magen, who serve as the project management backbone across all jobs. Their home addition process covers design, permit filing, structural work, and material sourcing, with dedicated project managers assigned per job. They’ve completed second-story additions, room expansions, and full-home renovations across the South Bay.
W&W also emphasizes environmental efficiency in their builds, positioning themselves as green builders who factor energy performance into new addition designs.
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5. Ingenuity Construction Group
Ingenuity Construction Group is owner-operated by Edgar Fernandes, with over 20 years building across Santa Clara, San Mateo, and Alameda counties. Their Cupertino presence is well-established, and they offer home additions as a clearly scoped service alongside ADU construction and full remodels. The team handles the permit process internally and draws on established relationships with local subcontractors and city officials that they’ve built over two decades of Bay Area work.
Their addition work covers room additions, second stories, and structural expansions, with a structured four-phase process from initial consultation through final walkthrough.
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6. ELS Home Builders
ELS Home Builders explicitly lists Cupertino in their service territory and brings a designer and architect with 20 years of Bay Area experience to every project. Their home addition approach covers the full cycle, from planning and permit navigation to construction and finish selection, with materials purchased at direct cost and those savings passed to the client. They handle second-story additions, in-law suites, room additions, and master suite builds for both owner-occupied properties and investment-oriented expansions.
The team leans heavily on experience when unexpected site conditions arise, drawing from a broad network of trade professionals in the Bay Area.
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7. Wise Builders
Wise Builders carries a dedicated home addition service page for Cupertino and assigns a project manager to each job who stays on as the homeowner’s primary contact from permitting through final walkthrough. Their process covers the full scope of a Cupertino room addition, from city permit applications to material selection to construction, and they are transparent about cost expectations from the initial consultation.
They are listed among Yelp’s top-rated ADU and room addition contractors near Cupertino and have consistently drawn positive feedback on project communication
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8. DreamHome Remodeling
DreamHome Remodeling serves the Cupertino market with a full home addition program that spans room additions, second-story builds, kitchen extensions, sunroom construction, and in-law suite additions. The company has a specific Cupertino service page that addresses the city’s permitting requirements and architectural character directly, and their team is experienced with local zoning compliance.
They work under a design-to-build model, handling the full project from architectural planning through final inspection, with an emphasis on matching the new addition to the existing home’s structure and finish.
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9. Valley Boutique Builders
Valley Boutique Builders is a Bay Area design-build firm with a dedicated Cupertino home addition page and a process built around understanding the city’s specific energy efficiency standards and zoning constraints before a permit application is filed. They work on room additions, sunrooms, additional stories, and flexible living spaces, handling everything from architectural drawings and 3D renderings through construction and final inspection.
The company describes a collaborative approach, working closely with clients during the design phase to ensure the addition fits both the structure and the lifestyle of the household before groundbreaking begins.
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10. Prada Builders
Prada Builders is a design-build firm founded by Eshed and Avia Dahan, covering the Bay Area including Cupertino. Their home addition services include second-story additions, master suite builds, kitchen extensions, sunrooms, in-law suites, and basement conversions. The company uses 3D rendering technology to show clients a detailed visualization of their addition before a single wall is touched, and assigns a dedicated project manager to each job.
With over 15 years in the Bay Area market, Prada Builders brings permit experience across multiple Santa Clara County jurisdictions and a personalized approach to each project.
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Ready to Add Space to Your Cupertino Home?
See our home addition work, call us at (408) 545-8413, or contact us here and we’ll walk through what your project needs.
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