About Us | GNL Granite Design – Expert Countertop Fabrication & Installation
Our Story: 17+ Years of Excellence in Custom Countertops
The beginning
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.
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.
Why Choose GNL Granite Design?
Serving Louisiana, Mississippi & Alabama for 17+ years.
150+ 5-Star Reviews
1-Acre Showroom & Yard – Largest Selection in the Region
100% Sustainability Commitment – Eco-Friendly Fabrication
Luxury Granite, Quartz, Marble & Dolomite Countertops
Fast Installation for Homeowners & Contractors
Cutting-Edge Technology for Precision & Quality
Craftsmanship & Technology: The Perfect Blend
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.
We work with top-tier materials, including:
✔ Granite, Quartz, Quartzite, Marble, Dolomite
✔ Premium Quartz Brands: Vicostone, Silestone, Caesarstone, Cambria, MSI
Who We Serve: Trusted by Homeowners & Contractors
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
Visit Our Showroom & Get a Free Estimate
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
