GNL Granite Design began as GNL Contractors, a family-owned business built from the ground up. Founded in our owner’s backyard, we expanded in 2010 to a larger facility at 195 Commercial Square, Slidell, Louisiana.

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Owners Neivair Castilho and Cristina Dellarrosa named GNL after their children — Gustavo, Natalia, and Leticia — as a tribute to their family values. Over the years, we have earned a reputation for excellence, amassing 188+ 5-star Google reviews and becoming a trusted partner for homeowners, contractors, and designers across Louisiana, Alabama, and Mississippi.

✅ Luxury Granite, Quartz, Marble & Dolomite Countertops
✅ Fast Installation for Homeowners & Contractors
✅ Cutting-Edge Technology for Precision & Quality
✅ 1-Acre Showroom & Yard – Largest Selection in the Region
✅ 17+ Years of Experience & 150+ 5-Star Reviews
✅ 100% Sustainability Commitment – Eco-Friendly Fabrication

At GNL Granite Design, we combine state-of-the-art CNC cutting technology with the artistry of skilled craftsmen to create stunning countertops for kitchens, bathrooms, fireplaces, and outdoor spaces. Every project is a work of art, customized to match each client’s vision while ensuring durability, elegance, and precision.

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We work with top-tier materials, including:
✔ Granite, Quartz, Quartzite, Marble, Dolomite
✔ Premium Quartz Brands: Vicostone, Silestone, Caesarstone, Cambria, MSI

We are proud to serve a diverse clientele, including:
🏡 Homeowners: Looking for elegant & durable countertops
🛠️ Contractors & Builders: Reliable fabrication & installation for projects
🏢 Resellers & Design Showrooms: Premium materials & wholesale partnerships

Transform your space with a custom countertop from GNL Granite Design. Visit our 1-acre showroom in Slidell, Louisiana, or contact us today for a FREE consultation!

📍 Address: 195 Commercial Square, Slidell, LA
📞 Call: (985)718-1158

🌎 Serving: Louisiana, Alabama, Mississippi