Finding the right building supply company in NYC for your needs isn’t easy. at 9 Brothers Building Supply, we provide everything you need for masonry, construction, hardscapes, and many other projects. Whether you’re running a construction company, ready-to-hire homeowner, or you’re a DIYer, we have all the products you’re looking for. Our staff is friendly, knowledgeable, and ready to help you. Whether you already know exactly what type of building supply products you need or you want us to help you choose, we’re here to serve you in the Long Island area. We carry a variety of products including concrete mixes, pavers, outdoor living products, and so much more. When you want to find the top brands for your specific needs, we carry all the best carefully chosen brands at both our locations.

Long Island & NYC’s Building Supply


9 Brothers carries an extensive range of construction & building supplies. We’re here to consult at any level of municipal development, commercial construction, hardscaping, and home development or improvement projects. With over 40 years of experience in the Building Supply industry, we have streamlined only the best products and logistics available for a fast and easy experience. The right building supply products combined with our guidance makes everything easier. From concrete forming, to chemicals and compounds, structural reinforcement, the widest selection of masonry, for various applications gives you endless choices for your next project. At 9 Brothers Building Supply, we provide all the necessary construction and masonry products for contractors and construction companies throughout the Long Island NYC area. We even supply homeowners looking to handle their own. Our team will help you choose the right products, no matter what type of project you’re trying to complete.

Masonry & Hardscapes

Creating the right patios, driveways, walkways, and other hardscapes can be difficult with all of the various technologies and options between different brands. Attaining quality projects to create desired looks can require using multiple brands and products with different installation techniques. Our knowledge can help make any combination of products possible. Our masonry products are all quality manufactured or natural stones sourced from leading brands. Along with our bulk material offerings, compliment or change your newly created hardscape with landscaping materials, such as bulk mulch, sand, rocks, and more!

Outdoor Living

We also carry everything you need to create an outdoor living space, swimming pool deck, retaining wall, outdoor fire features, and dining spaces. Our outdoor living products can be mixed or matched to create a space everybody is sure to remember. Create a euphoric outdoor space to you can always feel comfortable in and entertain family or guests. Let us help you create the perfect combination of hardscapes and outdoor living for you or your clients, call or stop in one of our two locations today!

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Make Plans Reality

Realize your visions with 9 Brothers Building Supply’s premium product categories. In the realm of masonry, discover a range that blends timeless craftsmanship with modern design, ensuring lasting beauty. Elevate outdoor spaces with resilient hardscapes, from elegant stone veneers to durable pavers.

For construction projects, find top-quality materials meeting the highest standards. Whether you’re a contractor or DIY enthusiast, our construction materials provide a foundation for success.

Transform landscapes with our bulk materials—mulch, topsoil, rocks, and sand. Tailor your outdoor space with precision, cultivating gardens, crafting pathways, or constructing structures. At 9 Brothers, we go beyond products; we’re your partner in turning plans into reality.

Make Plans Reality with us—your trusted catalyst for bringing visions to life. Explore possibilities, embrace potential, and experience excellence in every step of your project journey.

Outdoor Living Products

9 Brothers Building Supply is one of the largest suppliers of Outdoor Living products and Hardscapes on Long Island, NYC, and the 5 Boroughs. Transform your outdoor space with our best collection of quality products and wide variety of options to suit your taste. Let us help deliver your dream project today!



Outdoor Living Brands

Our Partners

Construction Product Brands


Projects Become Reality

Expert Knowledge

Your trusted source on Long Island and NYC, 9 Brothers Building Supply combines expertise with top-notch service.

Logistics & Procurement

Seamless logistics and top-tier procurement make 9 Brothers Building Supply the go-to choice for Long Island and NYC.

Large Inventory

Explore endless possibilities with 9 Brothers Building Supply—your go-to for construction needs, featuring an extensive inventory.

We’ll help you through the process

Product to Jobsite Service

Let us do the heavy lifting and ensure a smoother delivery with our equipment and expertise.

Babylon Building Supply

Delivery Service

Our fleet of ready to haul trucks regularly performs job site and home delivery to Long Island, and the 5 boroughs of NYC.


Our knowledgeable staff can consult your dream outdoor spaces, or guide product recommendations based on your individual needs and wants.

We Are...

9 Brothers Building Supply! A passionate family affair serving since 1980; offering the best outdoor living, masonry supplies, and bulk landscape supplies. We serve and deliver to Long Island, NYC, and the 5 boroughs.

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Plainview Building Supply

1670 Islip Ave. Brentwood, NY
11717 Phone: (631) 273-3323

Rockville Centre Building Supply

28 Mill Road Riverhead, NY
11901 Phone: (631) 208-1630


70 Comsewogue Rd SUITE 9 Setauket-East Setauket, NY 11733 Phone: (631) 928-4665