Construction Products

9 Brothers Building Supply is your source for construction products that we select for reliability and quality. We carry commercial-grade construction products that are harder to find than your local depot store.

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Brentwood Location

Brentwood9Brothers

1670 Islip Ave. 
Brentwood, NY 11717

CALL NOW: (631) 273-3323

Riverhead Location

Riverhead9Brothers

28 Mill Road
Riverhead, NY 11901

CALL NOW: (631) 208-1630

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.