New York’s # 1 Source For

Masonry Supplies
Construction Supplies
Bulk Materials

We’re here to consult at any level of municipal development,
commercial construction, hardscaping, and home
development projects.

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9 Brothers Building Supply is your Amityville masonry supply company! 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 and the 5 Boroughs of NYC.

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!



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Stop in or get in touch!

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