About Keystone

Our mission


Keystone Construction is committed to offering the highest-quality home building experience available in the Rio Grande Valley. From exceptional craftsmanship to dedicated 24/7 customer service, it’s our mission to work closely with our valued clients to execute their vision for their custom home.

Our history


Keystone Construction was established in 2000. Based in Mission, TX and servicing clients all throughout South Texas, the homebuilders specialize in the construction of custom homes and investment properties. Keystone Construction’s founder has nearly two decades of experience in the industry and prioritizes superior customer service and a commitment to the highest quality construction.

Our team

Glenda Gaona

Glenda Martinez-Goana is owner and co-founder of Keystone Construction. Specializing in real estate administration since 1998, Glenda is committed to ensuring each Keystone client receives the custom home they have always envisioned. Raised in McAllen, Texas, Glenda graduated with a Bachelor’s degree in Business Administration from the University of Texas-Pan American, and has been helping families realize their dreams of home ownership for nearly 20 years.

Delfino Gaona

Delfino Gaona co-founded Keystone Construction in 2000. A long-time McAllen resident, Delfino has been working in real estate since 1998 after graduating from the University of Texas-Pan American in Edinburg. Today, it is his mission to help homeowners in the Rio Grande Valley experience the benefits of exceptional construction in their custom home.

customer testimonials

“Great work, I am very happy with the end result. Overall such a great experience. Everyone I encountered were knowledgeable and friendly. I most definitely will recommend!”Cristina Nikkole Atilano (via Facebook)
“When we moved here looking for a home to buy no Builder was able to impress us. I fell in love with all their homes. They worked with our budget and the deal was a total success. Even after the sale they have been there for us with any concerns.”Gloria Lopez (via Facebook)
“Excellent experience with Keystone Construction. Awesome customer service, they attend to their customers every need made the process of purchasing my home stress free and enjoyable! Keystone’s homes are beautiful, the detail and quality of their homes are breathtaking! Overall recommended this construction company to anyone who is looking forward to investing in a great quality home.”Tisha Martinez (via Facebook)
“Overall wonderful experience, nice and friendly staff, met all and more of my expectations! Thank you.”Melanie Fabela-Fregoso (via Facebook)

Get started on your dream home.

About Keystone

Keystone Construction is committed to offering the highest-quality home building experience available in the Rio Grande Valley.


Address: 600 N Shary Rd, Mission, TX 78573
Phone: (956) 239-0487


Monday - Friday: 8:30 AM to 5 PM; Saturdays by appointment only


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