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Concept Design group

Reliable Design Build Company

Consider it Done.

Building Design

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

Welcome to Concept Design Group


Concept Design Group,

Great spaces. Great people. From start to finish.

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

With deep roots in both Design 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

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.

A black and white drawing of a light bulb on a white background.

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

A black and white drawing of a fountain pen on a white background.

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

Satisfaction

A black and white icon of a cube and a piece of paper.

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

Mission Viejo Lake
By Mehdi Momen June 24, 2025
Transform your Mission Viejo home with modern upgrades, sunlit patios, and energy-saving features for lasting comfort, style, and value in every detail.
A Contractor Cheking the leveling of the wall
By Mehdi Momen June 24, 2025
I guide every step as your Home Builder - General Contractor, managing permits, schedules, and teams to turn your dream project into a finished home.
A Home burning in palisades - Los Angles Fire 2025
By Mehdi Momen June 23, 2025
Find reliable design build contractors for post-fire home rebuilding after the Los Angles Fire, Palisades Fire, or Malibu Fire. Rebuild smarter in 2025.
Construction field
By Mehdi Momen June 22, 2025
Discover key insights on selecting project delivery methods for construction. Learn about various types, characteristics, and factors influencing choices for improved project management success.

Our Happy Clients