Building Premium Homes That Stand the Test of Time
With over 20 years of experience, SI Builders delivers thoughtfully designed residential and commercial spaces built with precision, quality, and long-term value in mind.
About Us
With over 20 years of expertise across residential, commercial, and restoration projects, we work with precision and purpose to create homes that reflect lasting value and modern living.
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Years Experience
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Quality Commitment
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Projects Completed
Madeira
Active Builder
Our Featured Projects
Explore some of our recent work, including premium homes in the Madeira subdivision and other high-quality construction projects across the region.
Calle Cenizo Residence
A modern residential home designed with clean architecture, functional layout, and long-term living in mind.
Sold Out
Madeira
Lot 65
Premium spec home built in the Madeira subdivision, showcasing strong demand and high-quality construction.
El Cedro Apartment Space
A durable and efficient commercial project designed to support business operations and long-term performance.
E St. Charles
A refined restoration project preserving historic character while enhancing structural quality and long-term usability.
Calle Splendida Residence
Elegant residential home combining modern design with high-quality construction and attention to detail.
Sold Out
Madeira
Lot 91
Spacious and thoughtfully designed home built for comfort, functionality, and modern living.
Premium construction services
With expertise across multiple sectors, SI Builders offers a complete range of construction services tailored to meet the needs of homeowners, investors, and businesses.
Introduction
Meet Our Interior Designer & Co-Founder
Maria Esthela Valdez
Interior Designer & Co-Founder
Maria Esthela Valdez brings a unique blend of architecture, fine arts, interior design, and historic preservation experience to SI Builders. As Designer and Project Manager since 2011, she has guided projects with a focus on beauty, functionality, craftsmanship, and respect for architectural history.
Her background includes architecture studies at Universidad de Monterrey and a Bachelor of Fine Arts in Painting and Sculpture from UT Brownsville, allowing her to combine technical expertise with artistic creativity.
Maria has also served the Brownsville community through leadership roles in historic preservation, Main Street Brownsville, and as Founder of the Neutra Cultural Center.
Professional Credentials
- ASID Associate Member
- Member ID: 1945281
- Membership Expires: March 31, 2027
Sergio M. Izquierdo Cepeda
Administrator, Supervisor & Co-Founder
As the Co-Founder of SI Builders, Sergio M. Izquierdo Cepeda has played a key role in the company's growth and success since its founding. With decades of experience in business management, administration, and construction supervision, he oversees the day-to-day operations, project management, and quality standards that define every SI Builders project.
Sergio earned a degree in Business Administration from Tecnológico de Monterrey (ITESM) and has continued his professional development through leadership, management, and construction workshops. Before co-founding SI Builders, he held executive leadership positions with major financial institutions, including Banco Confía, Citibank, and Banamex, serving as a Branch Manager, Regional Manager, and Regional Director.
His background in business, finance, and operations, combined with more than 20 years of experience managing and supervising SI Builders, has helped establish the company as a trusted builder throughout the Rio Grande Valley. Sergio remains committed to delivering quality construction, operational excellence, and homes built to provide lasting value for families and communities.
Professional Credentials
- ASID Associate Member
- Member ID: 1945281
- Membership Expires: March 31, 2027
Discover living in Madeira
by SI BUILDERS
Premium Homes in Madeira.
Build your custom home or explore SI Builders' collection of spec homes in Madeira, a 1,300-acre master-planned community in central Brownsville.
Request Madeira InformationWith over 20 years of construction experience, SI Builders is bringing quality craftsmanship, modern design, and long-term value to one of Cameron County’s most desirable communities.
Why choose us
Why Homeowners Choose
SI Builders
We are SI Builders, a company specializing in new construction and historic preservation projects across Texas. We are dedicated to crafting exceptional and functional spaces for both residential and commercial clients. With nearly two decades of experience, we have successfully completed projects throughout the Rio Grande Valley, including Brownsville, South Padre Island, and Harlingen, as well as in Central Texas and other regions across the state.
It would be our privilege to collaborate with you on your upcoming project. Please don't hesitate to reach out to discuss your vision and learn how SI Builders can bring it to life, wherever your project is located in Texas.
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