10 Best ADU Construction Companies In South Gate, CA
Looking for the best ADU builder in South Gate? Compare our list of the top 10 local ADU construction companies, including Cornejos Builders, and find your perfect fit.
Building an Accessory Dwelling Unit, or ADU, here in South Gate is a massive decision, and frankly, it feels a little different than other construction projects.
It’s not just adding square footage, is it? It’s about building a space for a family member, creating a private retreat, or securing a steady rental income that helps keep things comfortable when the cost of living keeps climbing.
You want a beautiful, long-term asset that adds real value, not a headache that takes twice as long and costs you sleepless nights. Especially with our Southern California weather, you need a unit built to last, that stays cool in the summer and holds up when that rare, heavy rain hits.
Choosing the right contractor means getting a partner who really understands the local landscape, from the unique soil conditions that affect foundations to navigating the City of South Gate’s permitting requirements.
We’ve worked near South Gate Park for years, and we know exactly what it takes to blend a new unit seamlessly into our established neighborhoods. When you see your friends or neighbors complimenting your new ADU, you’ll know you chose wisely.
1. Cornejos Builders: The Clear Choice for Your South Gate ADU
Look, we know you’ve got options for ADU construction companies, but let me tell you why Cornejos Builders stands apart, not with sales talk, but with how we actually work.
We’re a local crew. This is a personalized firm, not a huge, impersonal company operating out of an office downtown. We’ve completed 24 ADUs and counting, and that track record gives us confidence that’s grounded in real, local experience.
We’ve seen everything from garage conversions to brand-new, detached units, and we approach every one with a 1:1 approach because your project deserves our full attention. When you hire us, you’re looking for high quality and no surprises. We tackle both head-on.
First, quality: You get a 1-Year Workmanship Warranty on every new ADU we build. That covers the major items, structure, electrical, and plumbing, because we stand behind our crew and our craft.
Materials warranties can range from 2 to 50+ years, depending on what you choose. We use premium materials, ensuring durability and value.
Second, clarity: We know construction timelines and budgets can cause stress. We aim to build most ADUs in as quickly as 90 days from the start of construction, though we’ll always give you a precise, honest timeframe after our on-site visit.
What we quote you, we stick to. Transparency is our core value; there are no hidden costs or sudden, baffling price jumps. We even provide 3D renderings as part of our design-build process, so you can see exactly what you’re getting before we break ground.
We handle the entire process from planning to construction, delivering a turnkey ADU that’s ready to use the day we finish. We want you to feel heard, understood, and genuinely excited about this project.
As our owner, Alexsander Cornejos, says, “My goal with this company is to give back to the community I grew up in.” That kind of care changes the entire building experience. We deliver a beautifully crafted space built by local, trusted tradesmen who treat your home like their own.
What Homeowners Say About Cornejos Builders
Wendy Nuno
It was a pleasure to have this company do my company remodel. From the initial call to the finished product, the company was professional and communication was excellent.
They understood the needs of the project and executed it way past my expectations. I would highly recommend them for remodel
Daisy Tapia
Highly observant to detail or changes that others often over look. Gives various options on products and communicates in a professional manner.
I really admire the work ethic.
Our roots are right here in the area, and we take our projects personally. When you call us at (562) 319-3178 or message us through our contact page, you’ll be talking to a team that’s invested in this community.
2. Bay Cities Construction
Bay Cities Construction is a full-service design-build firm specializing in home remodeling and new construction, with a significant portfolio dedicated to Accessory Dwelling Units (ADUs) across Southern California, including the South Gate region.
They emphasize a streamlined, all-in-one approach that covers initial architectural design, permitting, and final construction, aiming to minimize client stress. The company highlights its dedication to custom solutions, transparent communication, and efficient project management.
Their ADU focus includes garage conversions, detached new construction, and attached additions, providing diverse options for homeowners looking to maximize their property’s potential for rental income or multi-generational living.
Their process is built on delivering high-quality craftsmanship backed by experience.
Chris B.
3. A-List Builders
A-List Builders is a licensed and insured general contracting company serving the Greater Los Angeles area, with a strong focus on high-end remodeling, home additions, and ADU construction.
They pride themselves on handling complex projects from concept to completion, managing everything from architectural drawings to final inspections.
The company promotes itself as a client-focused service provider, prioritizing customer satisfaction through clear scheduling, competitive pricing, and quality assurance. Their website showcases expertise in maximizing usable space, which is critical for ADU projects in densely populated areas like South Gate.
They position themselves as experts in efficient execution and securing the necessary permits promptly.
Alex B.
4. All Services Construction Inc.
All Services Construction Inc. is a remodeling and construction company that offers specialized services in Accessory Dwelling Unit construction throughout the Los Angeles County area.
Their offerings span from custom home building to specialized ADU solutions, including full design and build packages. They highlight their commitment to providing honest, up-front pricing and working closely with clients to realize their specific vision, whether for a rental unit or a space for extended family.
The company emphasizes delivering high-quality workmanship while adhering to strict project timelines and budget controls. Their approach is rooted in utilizing quality materials and maintaining strong communication to ensure a smooth construction experience for South Gate homeowners.
Maria Lopez
5. Dream Builders ADU
Dream Builders ADU is a company focused exclusively on the design and construction of Accessory Dwelling Units across Southern California.
This singular focus allows them to concentrate their expertise on navigating the specific regulatory landscape and design challenges unique to ADUs. They offer several pre-approved ADU models for faster execution, alongside fully custom design-build services.
The company emphasizes efficiency, transparency in cost estimation, and maximizing the return on investment for homeowners.
Their website highlights a comprehensive service that manages all aspects, including architectural plans, engineering, permitting, and construction, making the process straightforward for homeowners in the South Gate area seeking to add value and functionality to their properties.
Jennifer K.
6. ADU Building Pros
ADU Building Pros specializes in designing and constructing custom and pre-fab Accessory Dwelling Units throughout Los Angeles County.
They offer a comprehensive service designed to take the homeowner from the initial design concept all the way to a move-in-ready unit. The company is committed to using high-quality building materials and ensuring that every ADU meets local South Gate building codes and design standards.
They market their service as a reliable path to generating passive income or creating flexible living spaces. Their process focuses on transparent cost breakdowns and predictable timelines, aiming to deliver a product that exceeds client expectations while managing the entire regulatory and construction lifecycle.
Sarah Chen
7. My Space Remodeling
My Space Remodeling is a fully licensed and insured building contractor specializing in the design and construction of Accessory Dwelling Units (ADUs) and general remodeling, serving South Gate and the surrounding areas.
They emphasize their use of an in-house team, asserting that by not relying on subcontractors, they maintain superior control over project quality, timelines, and budget, which translates to a more reliable experience for the homeowner.
The company focuses on transparent pricing and effective communication, ensuring clients are involved at every stage. They aim to deliver ADUs that meet high industry standards using modern techniques and materials, ensuring a valuable and long-lasting addition to the property.
Jose Sanchez
8. Supreme Remodeling Inc.
Supreme Remodeling is a well-established contractor with over 20 years of experience in the industry, focusing on comprehensive ADU construction and design services for South Gate residents.
They specialize in creating Accessory Dwelling Units that seamlessly blend with the existing property’s aesthetic while fully adhering to all local building codes and zoning laws.
The company prides itself on its expertise in navigating the often-complex permitting process efficiently. They offer a complete spectrum of services, from the initial consultation and custom design to the final build and inspection, offering customization options that include modern styles, energy-efficient features, and smart home technology.
Monica Reyes
9. Los Angeles Advanced ADU Builders
Los Angeles Advanced ADU Builders specializes in guiding homeowners through the entire ADU development process in the highly populated South Gate community, where housing solutions require specialized expertise.
They offer comprehensive, professional, and reliable ADU construction services, focusing on solutions tailored to local properties.
The company makes a point of prioritizing quality craftsmanship and maintaining clear communication, with a team local to South Gate that understands regional building codes and the city’s character.
They strive to offer competitive and affordable pricing by recommending cost-efficient materials, ensuring that the finished ADU adds significant value and complements the existing neighborhood homes.
Steven D.
10. American Pride Builders Co.
American Pride Builders Co. is a local, family-owned company specializing in home additions and Accessory Dwelling Units across Los Angeles and nearby communities.
They emphasize providing experienced design and build services for homeowners looking to expand their living space, either by building out their existing home or adding a detached ADU.
The company highlights its extensive experience in coordinating the necessary subcontractors and minimizing disruption to the homeowner’s life.
They are committed to high-quality workmanship, and they provide every client with access to an assigned project manager who is available to answer questions and offer support throughout the entire ADU project, from consultation to completion.
Michael C.
Choosing the Right ADU Partner
Taking the time to compare your options, weighing out the claims, and checking references is just plain smart. You’re making a significant investment in your home and your family’s future, and you deserve a contractor that feels like a trusted neighbor, not a distant corporation.
That feeling of relief, of knowing the job was done right—that’s what we deliver. We focus on building ADUs that stand the test of time and that you can be truly proud of, leading to those wonderful moments of quality family time or the quiet satisfaction of a reliable rental income.
When you see how smoothly the process went, how quickly we finished, and how clean we kept the site, you’ll feel that sense of confidence you deserve. We’re here to be the clear, confident choice.
Ready to talk about your vision for a new ADU? Give us a call at (562) 319-3178 or send us a message through our website. Let’s make this happen, the right way.