About STG Design Build

Our Story

Who We Are

At STG Design Build, we deliver end-to-end design-build solutions that transform visions into reality. From concept to completion, our integrated team of architects, structural engineers, and MEP specialists works under one roof — eliminating the fragmentation that slows down traditional projects.

We serve residential homeowners, commercial developers, and institutional clients across Southern California, bringing deep expertise in architectural design, structural engineering, mechanical, electrical, and plumbing (MEP) systems, permitting, and construction management. Every project benefits from our commitment to precision engineering, code compliance, and creative problem-solving.

Headquartered in Los Alamitos, we serve clients throughout Orange County, Long Beach, and the greater Southern California region. From custom home renovations and ADU additions to commercial tenant improvements and ground-up construction, STG Design Build brings the full scope of design and engineering expertise to every engagement.

What Drives Us

Our Core Values

These principles guide every project we take on and every relationship we build.

Integrity

We do what we say and say what we mean. From honest cost estimates to transparent project timelines, our clients trust us because we earn that trust on every project. If something is not right, we fix it — no excuses.

Excellence

Good enough is never good enough. Our architects, engineers, and builders hold themselves to the highest professional standards — delivering designs that pass plan check the first time and construction that stands the test of time.

Collaboration

Great buildings are built by great teams. We foster open communication between every discipline — architecture, structural, MEP, and construction — so problems are solved early and the final result exceeds expectations.

Innovation

We combine proven engineering methods with forward-thinking design strategies — from energy-efficient MEP systems to modern construction techniques — ensuring every project is as efficient and sustainable as it is well-built.

Leadership

Rober Khalil

Founder & CEO

With over a decade of experience leading complex design-build projects, I founded STG Design Build to bridge the gap between visionary architecture and rigorous engineering. My hands-on approach means I'm involved from the first sketch to the final walkthrough.

I believe great buildings start with great relationships. Every project is a collaboration — with clients, with communities, and with the talented engineers and designers on our team. Whether it's a custom home renovation or a ground-up commercial build, I bring the same level of precision, creativity, and personal commitment.

Learn More About Me

Rober Khalil - Founder and CEO of STG Design Build

400+

Projects Done

100+

Happy Clients

Our Approach

We Are More Than Engineers — We Are Problem Solvers

Our approach blends traditional engineering expertise with innovation to deliver practical, reliable, and energy-efficient designs tailored to every project. We combine technical precision with creative vision to solve complex challenges and exceed expectations on every build.