Who We Are
MC ADU Builders is a family-owned construction company based in
Sacramento with a primary focus on accessory dwelling unit construction. We help homeowners create thoughtfully built ADUs for family, rental income, additional living space, and long-term property use.
Our experience extends beyond ADUs into custom homes, remodeling, and residential construction. That broader construction background gives our team the hands-on knowledge needed to manage ADU projects from planning and permits through construction and completion.
Today, MC ADU Builders is led by Armando Martinez and Carlos Lubiano, who remain directly involved in the work. We are builders first, not a sales-driven company, and we take pride in delivering clear communication, consistent workmanship, and a well-managed construction experience.
Our Story
MC ADU Builders grew from a foundation of hands-on residential construction. What began with smaller handyman and home improvement projects developed over time into larger renovations, additions, custom construction, and eventually a licensed General B construction operation
That broader experience now supports our primary focus on ADU construction. The skills developed across different types of residential projects allow us to understand how structures, layouts, finishes, and construction phases work together when creating a complete secondary living space.
Today, we bring that experience to homeowners looking to build ADUs for family, additional space, rental opportunities, and long-term property use, while staying committed to the same values that shaped the company from the beginning.
The People Behind MC ADU Builders
At MC ADU Builders, our work is supported by a team with years of hands-on construction experience. From our original foundation to the leadership managing projects today, we share a commitment to quality work, clear communication, and taking responsibility for what we build.
Built on Vision
Silvina Cornejo Martinez
Founder | Original Visionary
MC ADU Builders was built on the foundation created by Silvina Cornejo Martinez. Her vision, work ethic, and commitment to helping homeowners laid the groundwork for what the company is today.
She represents the original values behind the business: honesty, reliability, and taking pride in every project. That foundation continues to guide how the company operates and grows.
Leadership You Work With Directly
Armando brings over 20 years of hands-on construction experience. He leads projects with a focus on quality, accountability, and making sure every build is completed the right way. His direct involvement ensures consistency and strong results across every project.
Armando Martinez
Chief Executive Officer (CEO)
Carlos Lubiano
Chief Operations Officer (COO)
Carlos brings over a decade of experience managing projects and client relationships. He focuses on execution, communication, and making sure every client has a clear and smooth experience from start to finish.
Built by Our In-House Team
Behind every project is a dedicated in-house team that handles the work from start to finish. We do not rely heavily on outside crews, which allows us to maintain full control over quality, timelines, and execution.
Our team is made up of skilled builders who take pride in their craft. Every detail matters, and every project is approached with consistency, care, and accountability.
What Sets Us Apart
We Build It Ourselves
Unlike many contractors, we do not rely heavily on subcontractors. Our in-house team handles the work, allowing us to maintain quality, consistency, and control throughout the project.
Direct Communication
You work directly with the owners. This means clear answers, faster decisions, and a more personal experience from start to finish.
Transparent Approach
We believe in being upfront about costs, timelines, and expectations. No surprises, no confusion, just honest communication.
Built With Purpose
We focus on creating spaces that are not only visually appealing but also functional, durable, and valuable over time.
Our Mission
Our mission is simple: to deliver high-quality construction with a smooth, stress-free experience for every homeowner we work with.
We aim to transform spaces, bring ideas to life, and create results that our clients are proud of. Every project is approached with care, attention to detail, and a commitment to doing the job right.
Our Vision
We are building toward becoming a full design-build construction company, with a dedicated office and showroom where clients can explore materials, finishes, and layouts in person.
As the demand for ADUs continues to grow, our goal is to become a trusted leader in ADU construction across Sacramento and the Bay Area.
Who We Work With
We work best with homeowners who:
- Value quality over shortcuts
- Trust professional guidance
- Want a smooth and well-managed process
- Are planning for long-term property value
Our clients are typically homeowners who understand the importance of doing things right the first time.
Our Service Areas
We proudly serve Sacramento and surrounding areas, along with select Bay Area markets, including:
We focus on high-value markets where quality construction and strong communication matter most.
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A Team You Can Rely On
At MC ADU Builders, we treat every project like it matters because it does. We understand that your home is a major investment, and we take that responsibility seriously.
Our goal is not just to complete a project, but to build something that lasts and to create an experience that makes you confident in your decision to work with us.
Let’s Build Something That Lasts
If you are planning an ADU, remodel, or custom home, our team is ready to help you move forward with clarity and confidence.
Work directly with builders who care about the outcome.
Frequently Asked Questions
1. Who owns MC ADU Builders?
MC ADU Builders was founded by Silvina Cornejo Martinez and is operated by Carlos Lubiano and Armando, who are directly involved in every project.
2. Are you a licensed contractor?
Yes. We are a licensed General B contractor operating in California.
3. Do you handle projects in-house?
Yes. We perform most of the work with our in-house team to ensure quality and consistency.
4. What types of projects do you specialize in?
We specialize in ADU construction, custom home building, and full home renovations.
5. Do you work with homeowners only?
Yes. Our focus is on residential construction and working directly with homeowners.
6. What areas do you serve?
We serve Sacramento and select Bay Area cities within a 2 to 2.5-hour radius.
7. What makes your company different?
Our hands-on approach, direct communication, and commitment to quality set us apart from larger, sales-driven companies.
8. Do you offer design services?
Yes. We assist with planning, layout development, and guiding the design process for your project.
9. How do you communicate during projects?
You communicate directly with the owners, ensuring clarity and quick responses throughout the process.
10. How do I start working with MC ADU Builders?
You can contact us to schedule a consultation and discuss your project goals and next steps.