9 Brothers Building Supply is your leading slabpatio slabwalkway slab supply company!

Brentwood Slabs

9 Brothers Building Supply carries an assortment of quality Brentwood slabs from leading brands like Nicolock, Techo-Bloc, and elegant natural stone slabs from MS International. These slabs come in a large variety of colors and styles that will be sure to match the visions of our customers. Visit one of our locations in Brentwood or Riverhead to see the full selection of slabs in person and let us help bring a dream to life!

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Brentwood Location


1670 Islip Ave. 
Brentwood, NY 11717

Riverhead Location


28 Mill Road
Riverhead, NY 11901


We’ll help you through the process


Forklift & Boom Service

a mini crane service for tight or hard to reach delivery spots!

Delivery Service

with our fleet of ready to haul trucks anywhere on Long Island, NYC & 5 Boroughs

Consult Us

to build your dream backyard, driveway, landscape, pool, or patio!

Delivery across Long Island, NYC, and the 5 boroughs

Construction Site Delivery

Local Pickup

Home Delivery

Contractor & Local Business Deliveries