DESIGN + BUILD UNDER ONE ROOF

From architectural plans and permits to final construction, one team, one contract.

✓ 20+ Years · ✓ CA Lic #1069819 · ✓ Licensed Architect on Staff · ✓ 5-Star Google Reviews

Architectural Services

At Concept Design Group, we specialize in innovative building design that harmonizes aesthetics with functionality. Our team collaborates closely with clients to create spaces that inspire and meet their unique needs.

Construction Services

Our construction services ensure that your vision is brought to life with precision and quality. We manage every aspect of the construction process, delivering projects on time and within budget while maintaining the highest standards.

Service for other Architects

We provide tailored services for architects, offering expertise in design development, 3d Renderings, Revit Drawings, project management.

Partner with us to enhance your projects and streamline your workflow.

People walking in a hallway
Mehdi Momen

 Concept Design Group

Southern California Design Build Firm


Concept Design Group,

With you every step of the way, from start to finish on your building project


Established in 2003 by Mehdi Momen, Concept Design Group is one of Southern California’s premier Design-Build firms.

With deep roots in both Architectural and construction management, we specialize in creating inspiring spaces residential and commercial that reflect the unique vision and lifestyle of each client.

From modern minimalism to classic elegance, our diverse portfolio highlights our commitment to exceptional craftsmanship, innovative design, and functional beauty.

We’ve successfully designed and built projects across Northern and Southern California, always with attention to detail, efficiency, and quality.

Our dedicated team ensures every phase from concept to completion is guided by thoughtful planning, budget-conscious solutions, and a deep respect for timelines. At Concept Design Group, we don’t just build structures we build trust, creativity, and lasting value.

 Just Finished.

9000 SF Custom Home

Under Construction Projects


New Construction

Los Angeles Fire Rebuild

3500 SF Custom Home


New Construction

12000 SF Custom Home

Floor plans

Why Design Build?

Our design-build approach offers a seamless experience by integrating both design and construction under one roof. From concept to completion, we manage every detail—ensuring clear communication, faster project delivery, and cost-effective results. This collaborative method eliminates the gap between architect and builder, delivering efficient, high-quality outcomes tailored to your vision.

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Idea

We bring ideas to life. That is both our goal, and our vision, so we make every effort to deeply envision your idea. 

Design

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The design process at CDG involves several stages, from initial sketches to 2D and realistic 3D modeling. 

Satisfaction

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Your opinion & satisfaction matter throughout the process. From the very first line drawn, to the last. 

Accuracy

The only rounded corners you'll find at CDG are the ones you want rounded. We take accuracy very seriously. 

Blogs

Construction worker in a white hard hat reviewing plans at a building site
October 15, 2026
Use a residential code compliance checklist to plan safer, permit-ready Southern California homes and prevent major corrections before construction begins.
Modern white stucco house with red tile roof, pool, and landscaped backyard in sunlight
October 12, 2026
Choose a custom home builder Orange County homeowners can trust for coordinated design, permits, budgeting, and construction from concept to completion.
Two construction inspectors in hard hats review plans outside a modern house
October 11, 2026
See how the benefits of design build delivery bring clearer budgets, faster decisions, permit-ready plans, and one accountable team to your complex project.
Team work Collaboration
May 10, 2026
Construction knowledge helps architects turn ideas into buildable plans, catch costly errors early, and create designs that work on site.

Our Happy Clients