End-to-End ADU Construction in Southern California

Integrated architecture, engineering, permitting, and construction under one accountable team.

STG Design Build brings seven years of comprehensive design-build expertise to your accessory dwelling unit project. By unifying architectural design, structural and MEP engineering, permitting, and construction under one roof, we eliminate the friction and costly delays of managing multiple contractors. We deliver full-service, professional execution for homeowners and real estate developers seeking significant property expansions.

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End-to-End ADU Construction in Southern California

For homeowners, property owners, and real estate developers across Orange County and Long Beach who require comprehensive architectural design and full-service construction.

Why Choose Us

What sets us apart from the rest

Single-Source Accountability

We manage your ADU project from the initial concept through final construction, providing a single point of contact and eliminating conflicts between separate design and build firms.

Proven Track Record

Backed by over 400 completed projects and 100 plus clients served, our team brings a decade of specialized design-build experience to ensure your project is executed flawlessly.

Streamlined Permitting

Because our architects and engineers collaborate in-house, we produce highly accurate plans that minimize city revisions and accelerate the complex approval process.

Built for Serious Investors

We specialize in comprehensive design and construction for clients who require high-level engineering and structural integrity, ensuring your new unit maximizes long-term property value.

Ready to Get Started?

Book a consultation today and see how we can help grow your business.

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