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About Us
GNL Granite Design started its journey as GNL Contractors and was founded in the owner’s backyard. In 2010, this family-owned business invested in a larger building at 195 Commercial Square, located in the heart of the east side of Slidell, Louisiana.
The owners, Neivair Castilho and his wife, Cristina Dellarrosa, came up with GNL as a symbolic way to show their love to their children: Gustavo, Natalia, e Leticia.
Since then, we have built loyal and long-term customer and partner relationships and are very proud to have the best reputation in our area, accumulating 133 Google Reviews that only grow daily.
GNL works with big contractors and partners with reseller stores, but it’s with our neighbors that we are proud of doing business with! We have fabricated and installed thousands of projects with a beautiful variety of granite, quartz, quartzite, and marble hand-selected by our owner.
GNL provides material from quartz suppliers, including Vicostone, Silestone, Caesarstone, Cambria, and M.S.I. GNL has the most extensive inventory of all the fabricators in the area!
We use the most sophisticated technology in the industry at every step in the process, from laser to installation.
Our fabrication and installation teams have extensive experience integrating technology and artistry to create the perfect countertop for each client. We treat each project like a work of art, striving to help our clients realize their vision for their countertops promptly and at a competitive price.
Our sales representatives assist each client through each step of the process to ensure consistent communication and a smooth experience. We take great pride in providing positive overall customer experience, and we are continuously improving to guarantee that all our customers are always happy!