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The Best Design Build Firms in Los Angeles, California

19 Min Read

Managing construction projects can be stressful, especially if you’ll have to deal with separate parties for the project’s architectural and construction requirements. Careful planning and extensive communication between all parties are both crucial to ensure proper execution and save yourself cost overruns and schedule delays. Hiring a design-build firm consolidates all the planning, design, and construction responsibilities into one hub. With in-house designers, architects, and builders, clients can entrust the whole process to just one builder.

On this list, you’ll find the best design-build firms serving Los Angeles. We’ve evaluated these firms based on the awards and recognition they have received, their industry affiliations, their years in business, and the overall quality of their projects. These design-build firms have demonstrated their expertise in both design and construction and have built and designed some of the area’s most impressive homes.

Addition Building and Design

4335 Van Nuys Blvd. Suite #354, Sherman Oaks, CA 91403

With over 30 years of residential construction experience, Mike Ross has built this family-owned business into one of the most recognized firms in the Los Angeles area. Because of the firm’s high-quality design-build projects and Healthy High-Performance Homes, Addition Building & Design Inc. has been nominated six times by Qualified Remodeling Magazine’s Top 500 national companies. The company’s expertise includes custom homes ranging from $500,000 to $20 million, major additions and remodels, outdoor living areas, hillside construction, and fire-resistant homes.

Mike Ross, CEO, is also a member of the American Institute of Architects (AIA), Building Industry of Southern California, (BIA), National Association of the Remodeling Industry (NARI), American Society of Interior Designers Industry Partners (ASID), National Kitchen and Bath Association (NKBA), and the National Green Building Council (NGBC). Since Ross founded the company, his team has completed hundreds of custom residential projects and received numerous five-star reviews from clients. Ross’ daughter, Christine has recently joined the firm and is heading up the healthy living division & business development.

Project by Addition Building and Design

One of the company’s most impressive projects is Mila Kunis’ parents’ condo renovation in West Hollywood. In a joint venture with Breeze Giannasio Interiors, Addition Building and Design renovated the condo into an open concept living space making the home more comfortable for large family gatherings.

Creative Builders

6820 La Tijera Blvd. Suite #111, Los Angeles, CA 90045

Creative Builders is a full-service design-build firm founded by Tomer Benyehuda in 2007. Specializing in custom home renovations, the company has completed over 120 projects since its founding and has won over a dozen awards as well as five-star reviews from its many satisfied clients. The firm’s excellent craftsmanship has also caught the attention of many publications including Dwell, Design Father, and the Oprah Winfrey Network. The company focuses on innovative design solutions tailored to each client’s needs and lifestyle.

Project by B&R Creative Builders

Among the firm’s notable projects is this modern home in Los Angeles. The home features an exterior wood accent wall and beautiful hardwood flooring throughout the home. A white and gray color palette was used for the interiors, exuding an elegant, classic vibe. An accordion glass door extends the living room to an outdoor seating area which leads to the pool.

C&C Partners Design/Build

508 N Pacific Coast Hwy, Redondo Beach, CA 90277

Established in 1987, C&C Partners has proven its expertise in designing and building various home styles throughout Los Angeles, Beverly Hills, Culver City, Manhattan Beach, and its surrounding areas. In its many years of being in the business, the company has been one of the most preferred design and construction firms for LA’s exclusive neighborhoods. Co-founder Patrick Cunningham focuses on the design phase; his brother Michael leads the company’s team of construction experts. The firm is a member of the National Association of Home Builders, the American Institute of Architects Los Angeles, and the BIA Baldy View Chapter. Many of the firm’s works have been featured in a variety of publications including the Southbay Home, Builder News, and Custom Home News.

Project by C&C Partners Design/Build

Among the company’s impressive projects is this Playa del Rey modern home. The exterior’s mixed-siding materials give the home a unique curb appeal. Other features of the home include a modern staircase with floor-to-ceiling glass windows, a spacious kitchen with an eat-in island, and a minimalist living room that opens up to an outdoor living area.

Custom Design & Construction

2001 E. Mariposa Ave., El Segundo, CA 90245

For the past decades, Custom Design & Construction has been one of Los Angeles’ most reputable design-build firms, specializing in designing and constructing high-end residences across the area. Bill Simone, company founder, established the company in 1986 and he has built a reputation as an award-winning design-build firm. Simone has garnered multiple awards and recognition such as being a three-time winner of California Remodeler of the Year, an eight-time Qualified Remodeler Top 500 recipient, and a Chrysalis Remodeler of the Year.

Simone also served as the president of the National Association of Home Builders Los Angeles Remodelers Council, president of the Building Industry Association of Southern California, and is a Certified Graduate Remodeler, a Certified Aging in Place Specialist, and he is EPA lead-safe certified.

Project by Custom Design & Construction

In 2017, Custom Design & Construction remodeled a stylish transitional home in Los Angeles. The two-phase project featured a remodeled master suite, a kitchen, a laundry room, and an office space.


200 S Topanga Canyon Blvd #200, Topanga, CA 90290

Founded in 2002, GLYNNdesignbuild has specialized in design-build, traditional general contracting, and full architectural services for custom homes. Company founders Aaron and Britton Glynn both hold a Master’s degree in Architecture from the Southern California Institute of Architecture. Aaron, a licensed general contractor, and Britton, a licensed architect, lead the company with an extensive grasp of all phases of residential design and construction. From residential remodels, new custom homes, and site planning to sustainable design and construction, hillside expansions, and boutique retail spaces and office renovations, GLYNNdesignbuild can handle the overall process from design through construction.

Throughout the years, the company has received numerous recognitions from many publications including Dwell, Arc CA, Los Angeles Times, and Architectural Digest. Among the most impressive projects of the company is this extensive home remodel in Los Feliz. As the architect and general contractor of the project, the company used a gray concrete finish exterior with a wood plank accent wall and black trim. Floor-to-ceiling sliding glass doors surround one side of the home, which opens up to the pool area.

Greenworks Construction & Design

20301 Ventura Blvd. #222, Woodland Hills, CA 91364

Family-owned Greenworks Construction & Design continues to deliver top-rated design-build services to Southern California residents. Putting a premium on customer service, attention to detail, and high-quality workmanship, the company has repeatedly caught the eye of numerous publications as well as TV shows: HGTV House Hunters Renovation, Million Dollar Listing Los Angeles,, and Culver City: The Guide. With an in-house team of designers, contractors, plumbers, electricians, painters, and construction professionals, the company takes on projects of all sizes.

Project by Greenworks Construction & Design

In one of its projects, the company performed a complete interior remodel for a home in Davies Way. The remodel features beautiful light-colored hardwood flooring, an open-concept floor plan, and a modern white minimalist kitchen. One of the unique features of the project is the glass staircase with an under stairs wine cellar. An accordion floor-to-ceiling door also opens up to a balcony overlooking the city and enables more natural light to illuminate the living area.


300 S Raymond Ave. Suite #18, Pasadena, CA 91105

HartmanBaldwin is a full-service architecture, construction, and interiors company serving residents across Orange County and Los Angeles County. The company’s expertise lies in large-scale renovations and additions, historic restorations, and luxury custom homes. Bill Baldwin, company founder, has been in the architecture and construction industry for over three decades. Under his leadership—and with the help of a highly skilled and award-winning team of LEED-accredited architects, certified interior designers, project managers, craftsmen, and artisans—the company has been recognized as one of the leading design-build firms in the nation. In 2018, the company ranked among the Top 3 firms in California and the 15th among 550 remodeling companies in the U.S. by Remodeling Magazine’s Big 550.

Project by HartmanBaldwin

Among the company’s collection of impressive projects is the Padua Residence—a 1931 Old English home renovated into a rustic contemporary space. Upon completion, HartmanBaldwin was able to preserve the architectural integrity of the home while seamlessly blending the rustic and contemporary details.

Inhance Interiors

7257 Beverly Blvd. Suite #205, Los Angeles, CA 90036

Based in Los Angeles, InHance Interiors provides high-end residential design-build services throughout Los Angeles, including Bel Air, Beverly Hills, Burbank, and Culver City. The company was founded by Bre Hance, whose fascination with home design started at an early age as she spent time on job sites in model homes with her father, a residential painting and drywall contractor, and mother, a project manager for a custom home building company. Her exposure to the design and construction industry has resulted in her expertise with wide-ranging designs: Craftsman, Cape Cod, Modern Zen, Tudor, Mid-Century, Spanish, and California Ranch homes.

Project by Inhance Interiors

This modern farmhouse in Sherman Oaks is among the firm’s notable projects. To create an open floor plan suited for entertaining, this home was designed with tons of space, featuring wide hallways, large closets, custom built-ins, and numerous windows. Matte black and brass elements were incorporated into the design finishes to blend with the traditional cape cod features of the home. Completed in 2018, this project cost around $1,500,000 to $2 million.

Levi Design Build

21118 Vanowen St., Canoga Park, CA 91303

Levi Design Build strives to create functional, customized living spaces for each client. With the help of a professional team of designers and builders, the company covers the whole design-build process from the budgeting, design, and planning stage to the permit approval and construction phase. Avi Levi, company founder, was a business partner of a commercial construction company. After years in a corporate setting, Avi decided to build a business that focuses more on a personal approach and quality of service over profit. Ester Levi, the firm’s lead designer, completes the company’s husband-and-wife team that has earned the trust of many clients by consistently delivering successful projects and impressive results.

Project by Levi Design Build

One of the firm’s unforgettable projects was an extensive remodeling work for a mid-century modern home in Studio City. Built on a 9,600-square-foot lot with around 3,000-square-feet of interior space, the project is a perfect example of Ester’s design prowess and Avi’s expert building techniques. The home features an open concept floor plan, a great room with vaulted ceilings, a spacious kitchen, and high-tech smart home technology. For more information on Levi Design Build, you can visit their website here.

Marmol Radziner

12210 Nebraska Ave., Los Angeles, CA 90025

From interior design, landscape design, and construction to custom furniture design and fabrication, Marmol Radziner has repeatedly proven its extensive design-build capabilities. Led by architects, the company has built a reputation for high-quality craftsmanship and design expertise since its inception in 1989. The company has a team of architects, in-house designers, landscape designers, metal fabricators, carpenters, furniture makers, and construction crews: the firm is in a strong position to guide clients from the design phase to completion. Many of the firm’s projects have garnered prestigious awards including awards from the American Institute of Architects and American Society of Landscape Architects. The company has also been featured in various publications including Elle Decor, Interiors, Belle, and Home + Design.

Project by Addition Building and Design

Among its list of award-winning projects is this home in Mandeville Canyon. Situated between a canyon road and a hillside in the Santa Monica Mountains, the home follows the land’s gradual slope, with the eastern end of the home floating three feet over the canyon floor. Floor-to-ceiling windows surround the property, allowing access to the magnificent outdoor views of the home. This project was featured in Architectural Digest, GA Houses, Elle Decor UKMarie Claire Maison Italia, and  HÄUSER, and it received the Merit Award from the AIA California Design Awards.

Racing Green Group

3873 Berry Dr., Studio City, CA 91604

Offering general contracting, design-build, and home improvement services throughout Los Angeles, Racing Green Group has a proven track record in both architectural and interior design. Dougal Murray, company CEO, is a licensed contractor and realtor specializing in luxury real estate development. Jonathan Waud, chief operations director, is a licensed realtor and contractor and has worked as a design consultant to some of Hollywood’s biggest names. Waud has received international recognition for his exceptional design projects, many of which have been featured in Architectural Digest and other design publications.

Project by Racing Green Group

In 2019, the company completed this Dona Lola Contemporary Mid-Century home. This luxurious property features a light wood flooring, a unique black front door, high ceilings, floor-to-ceiling glass windows, a two-sided plaster fireplace, a minimalist modern kitchen, and a modern pool.

Spazio LA

10620 W Magnolia Blvd., North Hollywood, CA 91601

Spazio LA is a one-stop-shop design-build company specializing in high-end designs and remodels. With a highly experienced team comprised of architects, interior designers, project managers, and builders, the company can assist clients throughout the whole renovation process. From traditional and modern styles to Spanish and contemporary finishes, the team provides exceptional design and construction services cost-effectively and efficiently. In less than two decades in the industry, the firm has established itself as one of the premier design-build firms serving Los Angeles. The company has also amassed numerous features and recognition from various publications including Interior Collective, Voyage LA, HGTV, and Dwell, among many others. For more information about Spazio LA, visit

Project by Spazio LA

One of the company’s projects in 2019 is this complete home remodel in East Los Angeles featuring an open floor plan and all new hardwood floors, custom windows, and doors. The remodeled kitchen features semi-custom shaker cabinets and quartz countertops, with a bar area that doubles as a laundry area.


1424 4th St. Suite #501, Santa Monica, CA 90401

Santa Monica-based SweisKloss is a full-service design + construct firm offering building design, interior design, and construction services. The company was founded on the mission of blurring the line between indoor and outdoor spaces and transcending architecture norms. Abeer Sweis, design partner, received her Bachelor of Architecture degree from Woodbury University. In 1998, Sweis started her design firm. In 2006 she partnered with her husband Jeff Kloss—a licensed general contractor and also a Bachelor of Architecture graduate from Woodbury University, creating the construction side of the company. The company employs a holistic approach in order to provide clients with a creative and collaborative process from conception through completion.

Project by SweisKloss

This Bel Air home was originally designed by Paul Williams in 1937, SweisKloss did a complete renovation of the exterior in 2017, including all exterior landscape and hardscape, a new pool, and the addition of a new pool house and pergola. There were four specific elements that drove the design: staying true to the Paul Williams architecture, outdoor living, the utilization of natural light and maintaining privacy. To allow the property to flow, SweisKloss designed a pool and pool house that are parallel to the main residence. The pool house completely opens up to the pool and pergola areas creating a dramatic space for entertaining and outdoor dining.

Tellus Design + Build

2020 Placentia Ave. Suite B, Costa Mesa, CA 92627

Founded in 2005 as Orange County’s first green design and build firm, Tellus Design + Build has provided top-quality residential and commercial design and construction services throughout Orange County, Los Angeles, and Santa Barbara. Under Jesse Fowler’s leadership, the company has completed numerous stunning projects, many of which have been featured in publications including OC Metro, Discovery Channel, and Los Angeles Times. What sets the company apart from others is its focus on sustainable building practices and high-quality design solutions. From traditional, contemporary, and modern design to Mediterranean and green homes, Tellus Design + Build’s team can handle custom home projects from start to finish.

Project by Tellus Design + Build

Among its notable projects is this mid-century modern home featuring timeless hardwood floors, skylights, and minimalist decor. This project required structural modifications and a full-house renovation to achieve an open floor plan.

Trinity Builders and Design, Inc.

7022 Darby Ave., Unit A, Reseda, CA 91335

Family-owned and operated Trinity Builders & Design has been serving the Los Angeles and San Fernando Valley areas since 2013. Company founder Tamir started as a pool maintenance man over two decades ago. He then obtained his contractor’s license in constructing swimming pools and later on went to obtain his general contractor’s license after years of experience in the industry. Tamir’s brother, Asi, also joined him and together they established Trinity Builders and Design. From its humble beginnings, the company has grown into one of LA’s recognized design-build companies—with various awards and recognitions including being named among Qualified Remodeler’s Top 500 Remodelers for three years in a row.

Project by Trinity Builders and Design, Inc.

Over the years, the firm has worked on home interiors, bathrooms and kitchens, exteriors, and swimming pools. Among its projects is this luxurious contemporary home in Tarzana Hills. Completed in 2019, this magnificent property features a gray exterior with various-sized windows, a pool area overlooking the city and mountains, high ceilings, a glass staircase, and a minimalist open concept floor plan. Numerous floor-to-ceiling windows are also placed throughout the home, framing the city’s breathtaking views.