Who are we?

Empowering Your Projects
With Quality and Care

What is 9 Brothers Building Supply? No, nine brothers don’t actually run the business as the name suggests. Instead, it represents our founding family of our masonry and supply company in 1980. Located in Brentwood, it was started by five brothers who also had four other siblings. Implemented is a very fast technology system we have dearly invested in that allows us to check inventories of supplies and get supplies to job sites as fast, accurate, and smoothly as possible.


We Are

We have worked very hard to be as professionally customer oriented as possible and modernise the business. For us, the best part of being in business is watching our customers come find the item they’ve been searching for! Every day is different for us. It’s exciting because we get to help people fulfil their dream projects! 9 Brothers Building Supply is a State Certified Woman Business Enterprise designation, meaning it’s primarily owned and operated by women!

9 Brothers has been in the family business since 1980. In 2012, Ida Palmieri and her sons, Stephen Palmieri and Victor Palmieri purchased 9 Brothers Building Supply from her father-in-law and his four brothers. We are still a huge family affair; Ida’s husband Tony, and son-in-law Marco work here! When the purchase went through, we have had one determination to become the best building supply company of Long Island, the 5 boroughs, and NYC. The masonry and paver industry is a very specific business; when customers come in they know what they are looking for. And we have them! We are constantly updating our inventory to meet everybody’s needs. 9 Brothers purchased our Riverhead location in 2015 and focused on expanding the store’s offerings by adding new products and putting an even larger emphasis on customer service.


To serve with consistency and the best quality products for the best prices for years to come on Long Island. Our company is all family, and we are one!


By helping our customers and clients grow we know they will help us grow as well. We are committed to providing amazing service and our customers are everything! We will never dissapoint.


Meet our
amazing team

Ida Palmieri

President & Owner

Tony Palmieri


Stephen Palmieri


Victor Palmieri


Send us a Message

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