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.
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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.
We discuss your goals and identify the best approach for creating beautiful designs and adding maximum value to your property, with no hidden fees or surprises.
Once the contract is signed, we conduct a detailed survey to collect all necessary measurements and site information to ensure accuracy from the start.
Our team collaborates with you to shape your vision into a feasible design, refining layouts until we reach a practical and inspiring plan.
We prepare complete technical drawings that fully comply with Los Angeles city requirements and codes, minimizing delays in review.
We work directly with all relevant city departments, coordinating submittals and responses to accelerate the approval timeline.
You receive a city-stamped set of plans that are ready to build, giving you confidence to move forward with construction or resale.
Construction begins with our trusted team or your chosen contractor. We provide ongoing support to ensure flawless execution.
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
Los Angeles homeowners and developers trust 121 Design Build to turn ideas into profitable realities. From unlocking rental income with ADUs to maximizing property value with SB9, our clients see tangible returns on their investments. These stories highlight what’s possible when design, permits, and construction support come together under one roof.
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Professional, reliable, and extremely skilled, 121 Design Build Inc. delivered outstanding results on our kitchen and bathroom remodel. They communicated clearly and always showed up on time. We’re so glad we chose them.
The team at 121 Design Build Inc. transformed my vision into reality. Their creativity and professionalism made the entire process enjoyable and stress-free.
121 Design build is one of the most reliable and trustworthy architectural companies that I worked with.
After interviewing multiple companies, we chose 121 Design Build because of their design expertise and transparent process. They delivered exactly what they promised a beautiful, high-quality renovation completed on time and within budget. We especially appreciated how responsive they were to our questions and ideas.
They know what they are doing. Extremely fast, very knowledgeable. I recommend them to all my friends and family.
Frequently Asked Questions
Can’t find the answer you’re looking for? Please contact with our customer service.
Can’t find the answer you’re looking for? Please contact with our customer service.
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.