Custom ADU Builders in Santa Clara & San Mateo Counties

High-quality ADU design & construction delivered with precision, transparency, and award-winning craftsmanship.

Custom ADU Design and Construction in Santa Clara & San Mateo Counties

Building an ADU is one of the smartest ways to increase property value, create additional living space, or generate long-term rental income.
At Dream Builders, we specialize in custom ADU design and construction for homeowners across Santa Clara County and San Mateo County. With over 25+ years of experience, our design-forward team delivers modern, functional ADUs built to California codes — with clear communication, detailed planning, and exceptional craftsmanship from start to finish.

Whether you’re planning a detached ADU, attached ADU, garage conversion, or multi-unit layout, we bring innovation and precision to every project.

ADU Construction Services We Offer

We handle your entire ADU project — concept to completion:

Custom ADU Design & Architectural Planning

Detached ADUs (Backyard Units / DADUs)

Attached ADUs & Home Extensions

Garage Conversions

Basement ADUs & Lower-Level Apartments

Prefab / Modular ADU Integration

Full Permitting & Site Surveys

3D Renderings & Virtual Walkthroughs

Plumbing, Electrical & Structural Work

Smart Home & Energy-Efficient Integration

Why Homeowners Choose Dream Builders for ADUs

Transparent Estimates & Timelines

Bringing Silicon Valley precision to every ADU build.

Full Design-Build Firm

Architecture, engineering, project management — all under one roof.

Permit & Compliance Experts

We navigate city requirements in Santa Clara & San Mateo for you.

Transparent Pricing

Clear, itemized estimates with no hidden fees.

High-End Craftsmanship

Premium materials, sustainable building, and modern design principles.

Faster Turnaround Times

Efficient scheduling and expert project management keep your ADU on track.

Custom, Luxury Finishes

Tailored to your style — cabinetry, lighting, smart home, flooring & more.

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What Homeowners Are Saying

“Dream Builders delivered our ADU exactly as promised — beautiful design, amazing craftsmanship, and great communication throughout the entire process.”

“We converted our garage into a stunning ADU for my mother-in-law. Dream Builders handled the design, permits, everything. Couldn’t be happier.”

“The ADU came out better than we imagined. Sleek, modern, and super functional. Their attention to detail is unmatched.”

See Our Work

Serving Homeowners Throughout

Santa Clara County

San Mateo County

For Further Inquiries Call

818-213-2663

Dream Builders • Custom Homes & ADUs

Serving Santa Clara County & San Mateo County

Ready to Build Your ADU?

Increase your home’s value and create functional, beautiful living space.