9 Brothers Building Supply is your leading bulk rockgravelpebble supply company!

Bay Shore Rocks

9 Brothers Building Supply carries an assortment of quality Bay Shore rocks ranging in sizes and colors. Our Brentwood location carries Bluestone screenings and dust while our Riverhead location is the main source for crushed bluestone gravels, pea gravels, red crushed gravels, and beach pebbles from MS International. These rocks will be perfect for permeable pavement solutions, driveways, and walkways. Stop in today and you will find what you need!

Stop in or get in touch!

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

COVID-19 Essential Businesses New York
COVID-19 Essential Businesses New York

Update 6/17/20

Essentially, we will not be coming into contact with clients.

Our stores are open for business. We are allowing customers inside, but we ask that you please wear a mask - and follow social distancing guidelines. We would love to help.

If you have any questions, please ask. We urge you to visit NY Governor Cuomo’s Issues Guidance on Essential Business List.