10 Best ADU Construction Companies In Paramount, CA
In Paramount, California, life happens in both the backyard and the living room. Summer means firing up the grill with family, and when winter rolls around, you’re reminded why having a cozy indoor space matters so much. Building an ADU here means making room for real life.
Maybe your kids are starting families of their own and need a place nearby. Maybe your parents are getting older, and you want them close, but with their own space and independence. Or maybe you’re thinking practically about rental income that can help with mortgage payments or retirement down the road.
Paramount isn’t fancy, but people here care about things working well and lasting long. From Paramount Park to the neighborhoods lining Paramount Boulevard, homeowners want spaces that fit how they actually live.
When you’re choosing a contractor, you need someone who knows how to navigate Los Angeles County permits without the runaround, who respects your neighbors during construction, and who uses materials that won’t buckle under the Southern California sun and the occasional storm.
You need someone who listens, shows up, and helps you create a space that actually fits your life, one your whole family will use and appreciate for years to come.
Cornejos Builders – Featured Contractor
We are Cornejos Builders, and building ADUs is what we do. Seriously, it’s one of our core specialties. When you call us, you’re talking with a team that treats your home like ours. We know you’re thinking about functionality, comfort, and how your property performs long term. On our ADU page, we show that we manage everything from permits and architecture to construction and follow-up, so you don’t have to juggle subcontractors.
Here’s what sets us apart:
- We deliver a turn-key ADU solution—you get a living unit ready to move into, not just a shell.
- We offer a workmanship warranty because we build it right, we check it, and we stand behind it.
- We use quality materials and premium finishes so your ADU doesn’t feel like an afterthought—it feels like a full, comfortable home.
- We keep communication simple and clear. You’ll know who is doing the work, when they’ll show up, and what’s next.
- We operate locally, so we understand the Los Angeles County rules, the city of Paramount’s zoning nuances, and we help streamline approvals so you don’t wait forever.
We’ve built ADUs and remodels across Southern California, each one shaped around what the homeowner actually needs. If you have extra lot space, are thinking about multi-generational living, or want to increase rental income without moving, we’ll walk you through what makes sense for your situation.
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.
We focus on finding the right project for your lifestyle and budget. If you’d like to talk through your vision, call us at (562) 319-3178, and we’ll arrange a time to meet, walk your site, and plan something that works.
Choosing the Right ADU Partner
1. THE ADU BUILDER
THE ADU BUILDER is a Southern California construction firm focused almost entirely on Accessory Dwelling Units and garage conversions.
They position themselves as true ADU specialists, guiding homeowners through design, permitting, zoning, and full construction with an emphasis on compliance and efficiency.
Their messaging reflects a purpose-driven approach, highlighting how ADUs can support rental income, multigenerational living, or flexible housing solutions.
The company invests heavily in educational content, helping clients understand timelines, regulations, and financing options before committing to a build.
They manage the complexities of city approvals and inspections, reducing stress and potential delays for homeowners.
Their project portfolio includes detached backyard units, attached ADUs, and legal garage conversions, all designed to integrate seamlessly with the primary residence. Overall, they present as a process-oriented, knowledgeable builder that prioritizes transparency, city coordination, and long-term value.
Jenae Green
Jimmy NG
2. ADU Homes
ADU Homes is a design-build firm dedicated exclusively to ADU development across Los Angeles and Orange County. They promote a streamlined, all-in-one service model that includes design, engineering, permitting, and construction, supported by fixed pricing and completion-date guarantees. Their brand targets homeowners who want structure, predictability, and minimal stress throughout the build process.
The company offers a wide variety of floor plans and custom design options, with an in-house design studio and a strong visual portfolio of completed units.
Their messaging highlights practical use cases such as housing family members, creating guest suites, or generating rental income. ADU Homes emphasizes feasibility assessments, code compliance, and realistic budget planning, reinforcing their image as a process-driven and highly organized ADU specialist.
They come across as reliable, methodical, and focused on delivering consistent quality that matches initial design promises.
Marc Van Enck
3. Esco Builders Inc.
Esco Builders Inc. is a Downey-based general contractor with a strong concentration on ADUs and legal garage conversions.
They serve Downey and surrounding communities, positioning themselves as a local, reliable builder known for quality workmanship and efficient project timelines.
Their service model bundles design, planning, and permitting, helping clients navigate regulatory requirements while keeping projects code-compliant and organized. Much of their messaging emphasizes speed, clear documentation, and practical solutions for converting existing garage space into functional living units.
Their content reflects familiarity with regional zoning regulations and construction standards, suggesting a hands-on, experienced approach. Esco Builders presents as a smaller, focused operation that values professionalism, communication, and dependable execution. They appear well-suited for homeowners seeking straightforward ADU solutions with a balance of speed and structural integrity.
Alex Williamson
Jane Lapham
4. NEO Builders
NEO Builders is an ADU-focused contractor serving the Los Angeles area, specializing in garage conversions and ground-up ADU construction.
They present themselves as a full-service ADU development team handling everything from design and permitting to final inspection. Their website is rich in educational content, explaining timelines, zoning rules, financing options, and common homeowner concerns. This positions them as a knowledgeable guide through a complex process, particularly for first-time ADU builders.
They emphasize structured project management, clear planning, and efficient coordination with city departments and inspectors. NEO Builders highlights experience working with diverse lot sizes and neighborhood conditions, reinforcing their ability to adapt designs to real-world constraints.
Their brand comes across as process-driven, organized, and focused on delivering predictable outcomes with minimal homeowner stress.
Leslie
I connected with Joseph and NEO builders as part of an initial inquiry. The consultation call was more than I expected; Joseph is extremely knowledgeable and forthcoming and understands the ADU business. I definitely look forward to working with him and his team in the future.
Andres Martinez
5. Go ADU Construction
Go ADU Construction is a family-owned company specializing in the design and construction of ADUs, garage conversions, and backyard homes throughout the Los Angeles area.
Their branding centers on craftsmanship, durability, and creating ADUs that feel like permanent, high-quality residences rather than temporary add-ons. They offer both pre-designed plans and customized layouts, tailoring each project to fit specific site conditions, privacy needs, and homeowner goals.
Their process includes feasibility analysis, design consultation, permitting, and full construction services. Messaging highlights trust, responsiveness, and long-term structural integrity, appealing to homeowners who value attention to detail.
Go ADU Construction positions itself as a reliable, client-focused builder with a strong commitment to communication and build quality.
Maya
Randy Hui
6. Better Built ADU
Better Built ADU is a Los Angeles-based construction company specializing in turnkey ADU and garage conversion projects.
They focus on providing a clear, structured process that guides homeowners from feasibility and design through permitting and final construction. Their messaging emphasizes transparent timelines, realistic budgeting, and navigating the city approval process with clarity and efficiency.
Their portfolio showcases detached ADUs, attached units, and garage conversions designed for rental income, guest housing, or multigenerational living.
Visual consistency and modern finishes are hallmarks of their work, ensuring new structures blend naturally with existing homes. Better Built ADU presents as a dependable, practical contractor committed to smooth project flow, communication, and meeting expectations without unnecessary complications.
7. Pacific Green Homes
Pacific Green Homes operates as a design-build contractor specializing in ADUs, garage conversions, and sustainable residential construction throughout Southern California.
Their approach blends environmental consciousness with functional design, emphasizing energy efficiency, durable materials, and modern layouts.
Their ADU division offers customization based on lot size, homeowner goals, and local zoning requirements, ensuring each unit meets both aesthetic and functional standards.
They provide a structured process that includes consultation, engineering, permitting, and construction, with careful attention to detail and regulatory compliance.
Their portfolio includes a range of unit types, from compact studios to multi-bedroom ADUs. Pacific Green Homes positions itself as a professional, quality-driven builder with a strong focus on craftsmanship, sustainability, and efficient project execution.
8. HSO Construction
HSO Construction is a Los Angeles-based contractor offering ADU construction, garage conversions, and residential additions. Their ADU services focus on maximizing limited lot space while maintaining strict compliance with city regulations.
They present themselves as a hands-on team closely involved throughout every phase of the project, from planning to completion.
Messaging highlights efficiency, transparency, and practical design solutions suited to Southern California neighborhoods. They emphasize organized scheduling, consistent communication, and responsive project coordination, appealing to homeowners who value reliability and clear timelines.
Their work often includes functional layouts ideal for rental use or extended family living. HSO Construction comes across as a dependable choice for homeowners looking for straightforward execution and steady oversight.
Conclusion
With Cornejos Builders you get a contractor who knows the area, knows the process, and knows how to deliver. If you’re ready to make your property work harder for you and your family, give us a call at (562) 319-3178 or visit our contact page to set up a conversation.