121 Design Build CEO

121 Design Build started in Los Angeles with one clear mission: create modern, affordable architecture that adds measurable value to every property. Deeply rooted in LA’s neighborhoods and building codes, we’ve become a trusted local partner for homeowners navigating additions, ADUs, and remodels. What began as a small studio has grown into a name with global reach, designing over 5M+ sqft worldwide, while maintaining a strong Los Angeles presence and reputation. Our foundation is built on efficiency, transparency, and a results-driven mindset, helping homeowners unlock the true financial and lifestyle potential of their properties. Every project is proof that thoughtful design is both beautiful and profitable.

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On-Time
Permits

Building Smarter,
Building Value

At 121 Design Build, our mission is to make every square foot count. Whether it’s an ADU for rental income, a remodel that increases resale value, or a ground-up build, we ensure your investment works harder for you. With a focus on speed, affordability, and return on investment, our team combines design innovation with deep knowledge of zoning and permitting in Los Angeles. The result: smarter projects, faster approvals, and spaces that grow both your lifestyle and your property’s worth.

Mehdi Ghasemi
Principal | Director of Design
Kayarash Karami
Design Professional III
Sima Keyvani
3D Visualizer
Shima Milani
3D Visualizer
Simin Ghasemi
Architectural Drafter
Naghme Nazar
AI Programmer (Dev.)
Mark Sheibani
Architectural Drafter
Farzin Darvish
Field Surveyor | Civil Drafter

Built on Strong Values, Driven by Results

At 121 Design Build, our values are the foundation of every project. From fast approvals and innovative design to transparent communication, we focus on creating spaces that are modern, affordable, and profitable. More than just a construction company, we are your partners, guiding you from the first sketch to the final build. With our full-service design-and-build approach, you won’t need to juggle multiple contractors or worry about delays. Every detail is handled with precision and creativity, ensuring your project not only reflects your style but also maximizes long-term value and peace of mind. Let us turn your vision into reality.

Fast Project Turnaround

We secure permits in months, not years, streamlining the approval process so your project moves forward without costly delays.

Experienced & Innovative

With over 5M+ sqft designed worldwide, our team blends proven expertise with modern, creative solutions that elevate every project.

Transparent Process

No hidden fees and no surprises. Just clarity, respect, and accountability at every stage of design and construction.

Affordable Design Solutions

We deliver smart, cost-effective approaches that maximize ROI while maintaining high quality and modern design standards.

High Attention to Details

From precision in compliance to long-term durability, our designs are built with care that adds value well beyond the build.

Commitment
‍

We stand by you at every step, offering full guidance, transparency, and support whether you build with us or your own contractor.

Real Projects,
Real Results

Read what our clients share on Google, and explore the projects behind their experiences.

5.0 ★★★★★ · 19 Google reviews
See all reviews on Google ↗
★★★★★

“Their architectural design services exceeded all expectations. Every detail was thoughtfully planned, and the final design perfectly matched our lifestyle.”

Baskar
Google review ↗Palm Desert Remodeling project
Palm Desert Remodeling ↗
★★★★★

“Highly recommend for anyone looking for architectural consultation and home renovations. The process was efficient, transparent, and the results were amazing.”

Inès Beaudoin
Google review ↗Hatteras Street Home Addition project
Hatteras Street Home Addition ↗
★★★★★

“Had a really positive experience with 121 Design. The team was professional, responsive, and very detail-oriented...”

arezoo kayal
Review excerpt · Google ↗Elkwood Street Two-Story ADU + SB9 project
Elkwood Street Two-Story ADU + SB9 ↗
★★★★★

“Working with 121 Design Build was honestly a very smooth experience from start to finish. The team was responsive,...”

Naghmeh Nzr
Review excerpt · Google ↗Tasmania Cir Resi project
Tasmania Cir Resi ↗
★★★★★

“The architectural consultation was very detailed, and the team provided excellent guidance throughout the project. Their interior design recommendations made our home look elegant and modern.”

Elia Durand
Google review ↗Strawberry Estate project
Strawberry Estate ↗
★★★★★

“Working with 121 Design Build Inc. was a stress-free experience. Their team stayed on schedule, maintained great communication, and the final outcome was beautiful.”

Desmond Patterson
Google review ↗Packard Center project
Packard Center ↗
★★★★★

“Our renovation project went smoothly thanks to their clear communication and organised approach. The team handled every...”

Trena Hockensmith
Review excerpt · Google ↗Burbank Addition project
Burbank Addition ↗
★★★★★

“The team at Design Build Inc. went above and beyond to create a space that perfectly suits our lifestyle. They combined...”

Nicolai Martins Schiong
Review excerpt · Google ↗The Crescent project
The Crescent ↗
★★★★★

“Design Build Inc. made our renovation completely stress-free. Their project manager kept us updated every step of the...”

MOHD NOOR AZAM ISMAIL
Review excerpt · Google ↗Par Residence project
Par Residence ↗
★★★★★

“Design Build Inc. turned our vision into reality. From the initial consultation to the final walkthrough, their...”

Jesús González Silva
Review excerpt · Google ↗Otis Avenue Second-Story Addition and Remodel project
Otis Avenue Second-Story Addition and Remodel ↗
★★★★★

“I had an amazing experience working with 121 Design Build! From start to finish, their team was incredibly professional,...”

Amir Mofidian
Review excerpt · Google ↗812 Fuller Avenue Affordable Housing project
812 Fuller Avenue Affordable Housing ↗
★★★★★

“We’ve been working with 121 Design Build on 2x ADU projects, and we’re very happy with how everything is turning out....”

Vala Javahery
Review excerpt · Google ↗West 36th Apartments project
West 36th Apartments ↗
★★★★★

“121 Design build is one of the most reliable and trustworthy architectural companies that I worked with.”

AF Construction, Inc.
Google review ↗Louisiana Residence project
Louisiana Residence ↗
★★★★★

“They know what they are doing. Extremely fast, very knowledgeable. I recommend them to all my friends and family.”

Ahmad Hosseinkhani
Google review ↗Grand View project
Grand View ↗
★★★★★

“121 Design Build helped us redesign our office space, and the results are amazing!”

vahid arad
Review excerpt · Google ↗Lyons Equity Fire-Damage Restoration project
Lyons Equity Fire-Damage Restoration ↗
★★★★★

“121 Design Build Inc. in Woodland Hills stands out as an exemplary construction company. Their commitment to excellence...”

Michael Mah (MIKE MAH)
Review excerpt · Google ↗Oak Residence project
Oak Residence ↗
★★★★★

“Thank you for professional ethics and excellent results. Recommended to everyone”

ramin Ghoujeghi
Google review ↗
★★★★★

5-star rating · No written review

Corby Building
Google review ↗
★★★★★

5-star rating · No written review

Vafa Ansari
Google review ↗Hatteras One-Bedroom ADU Conversion project
Hatteras One-Bedroom ADU Conversion ↗

Frequently Asked Questions

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What makes 121 Design Build Inc. different from other design/build firms?
Are you licensed architects, or a design/build service?
How is 121 Design Build Inc. different from a traditional architecture firm?
Does 121 Design Build Inc. provide construction services?
Can I use my own contractor with 121 Design Build Inc.?
Still Have Questions?

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