LOS ANGELES CITY HOMEOWNERS:
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Explore ADU, SB 9 and home addition possibilities, with preliminary cost estimates and rental potential.
Fast, Modern, Affordable Architecture in Los Angeles
Since 2011
From ADUs and remodels to large-scale new construction, 121 Design Build delivers permit-ready designs faster than anyone in Los Angeles. With a transparent process, affordable pricing, and expertise in zoning and approvals, we help homeowners not only build beautiful spaces but also unlock hidden property value. Every project is approached with a clear focus: modern design, speed, and maximizing ROI.
Adding Space, Adding Value
At 121 Design Build, we don’t just design spaces, we help homeowners unlock new potential in their properties.. Our team specializes in additions, remodels, ADUs, and SB9 developments that increase living space while creating long-term financial and lifestyle returns.
We combine modern, minimalist design with deep technical expertise in zoning and permitting, giving homeowners peace of mind and profitable results. Whether you’re expanding for family, rental income, or future resale, our approach makes every square foot count.
Worldwide
Expertise
Annually
At 121 Design Build, we’re committed to building smarter, more resilient spaces. Through sustainable practices and efficient design methods, every project is crafted to stand the test of time, balancing aesthetics, safety, and investment value.
Delivering Beyond Expectations
At 121 Design Build, we specialize in creating spaces that add lasting value for homeowners across Los Angeles. From new construction to remodels, additions, and ADUs, our services are designed to maximize functionality, streamline approvals, and elevate everyday living. Explore how our team turns vision into reality—on time, on budget, and built to last.
See How We Bring Vision to Life
Explore a selection of our featured projects, each reflecting thoughtful design, precise execution, and lasting value. From hillside estates and custom homes to multi-family and commercial spaces, our portfolio highlights how we help clients maximize space, speed approvals, and elevate everyday living.
Insights for Smarter Building
Knowledge is power when it comes to building in Los Angeles. Our Insights section features articles on everything from the latest ADU regulations and SB9 opportunities to cost-saving remodel strategies. We share the tools and updates you need to plan smarter and maximize your property’s value.
Real Projects,
Real Results
Read what our clients share on Google, and explore the projects behind their experiences.
“Their architectural design services exceeded all expectations. Every detail was thoughtfully planned, and the final design perfectly matched our lifestyle.”
“Highly recommend for anyone looking for architectural consultation and home renovations. The process was efficient, transparent, and the results were amazing.”
“Had a really positive experience with 121 Design. The team was professional, responsive, and very detail-oriented...”
“Working with 121 Design Build was honestly a very smooth experience from start to finish. The team was responsive,...”
“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.”
“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.”
“Our renovation project went smoothly thanks to their clear communication and organised approach. The team handled every...”
“The team at Design Build Inc. went above and beyond to create a space that perfectly suits our lifestyle. They combined...”
“Design Build Inc. made our renovation completely stress-free. Their project manager kept us updated every step of the...”
“Design Build Inc. turned our vision into reality. From the initial consultation to the final walkthrough, their...”
“I had an amazing experience working with 121 Design Build! From start to finish, their team was incredibly professional,...”
“We’ve been working with 121 Design Build on 2x ADU projects, and we’re very happy with how everything is turning out....”
“121 Design build is one of the most reliable and trustworthy architectural companies that I worked with.”
“They know what they are doing. Extremely fast, very knowledgeable. I recommend them to all my friends and family.”
“121 Design Build helped us redesign our office space, and the results are amazing!”
“121 Design Build Inc. in Woodland Hills stands out as an exemplary construction company. Their commitment to excellence...”
5-star rating · No written review
Frequently Asked Questions
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Ready to build Smarter?
Book your free consultation today and discover how quickly we can turn your ideas into permits and long-term property value. Our team is here to guide you from the first sketch to final approval.