I highly recommend this business! We were so glad we decided to go with a local neighborhood…read morecontractor as the personal touch made all the difference. Both Tom and Manny were a great team! They were honest, reliable and operated with integrity .They guided us through our kitchen remodeling project in a professional and supportive manner. They communicated regularly, handled all aspects of the project seamlessly and straightforward.They transformed our dated kitchen in to a beautiful space for all of future family gatherings. We're still amazed by it! Their craftsmanship is worth appreciation!

Very nice selection of kitchen and bathroom Cabinets. I…read moredealt with Sophia as did she was extremely knowledgeable with the products and had a great eye for the design concept of it. Highly recommend and will be back for future products.

This location is where we go for all lumber and hardware selection ... they are reliable and always…read morehave helped with any issues and they also deliver ( for a few) I will be back

TERRIBLE! GO ELSEWHERE! I don't often write bad reviews but in this case I wish I would've known!…read moreSo, don't use riverhead building supply! They don't have it together and you can't trust them with your building supply orders. I placed an order, they delivered it with an invoice, which I paid promptly. Almost a month later they "rebilled" my account because they apparently made a mistake charging me less for one of the items than they should have. So, they're expecting me to pay for their mistakes... randomly weeks after the order is closed...and have the nerve to try to tell me they'll lose money if I don't pay for their error. Last time I checked, they're the big company, and I'm the consumer. This company should want to keep a customer that had multiple projects going and an account with them. They're not getting another dime of my money. And that's fine because the other lumber and building supply companies on the Island are cheaper (for the same stuff, from the same supplier!), have more of a selection, and take responsibility for their own mistakes (which they don't often make, unlike Riverhead building supply). So skip Riverhead building supply and save yourself money and aggrevation!

I have been doing business with Sider Lumber on dozens of projects, and they always perform. They…read morehave great prices, service,and the knowledge to get the right supplies for the project. A plus 5 stars

This place I've ordered a lot of stuff here this time got one price then 3 days later it was 100…read moredollars more then when picking stuff up had to keep waiting to get materials waited over a hour shop around for prices before you come here

Usually Very Nice folks at HF.. not today... horrific..like I bother you attitude. Corey,…read morebecause you were "busy".. not a good reason. A few customers agreed, you were not to CUSTOMER FRIENDLY.. hope the.anger dissolves.

A dream come true for the tool enthusiast. Very low prices along with coupons & deals (though I…read morehope that's not just because this is a new location) make this a must even if you're just looking for a random tool and don't want to deal with the massive caves called Home Depot or Lowes. This location is not as big & doesn't feel as overwhelming. Staff was friendly enough as well and it didn't feel like you had to go on an excursion to find someone to help you.

The best place to get keys made I have ever found. Been to…read moreHome depot and Walmart in the past and those keys never work right. On top of being in and out and not having to look for someone to help me, he was so courteous and nice. When l got home the key worked so much better as If it were an original key.

I called them to find out if I can bring my lawn mower in for service. I explained what was going…read moreon and the gentleman on the phone told me to check the carburetor. I sheepishly told him I didn't know where it was . So instead of just thinking " she's just some dumb broad", he walked me through what I needed to do first. After I hung up, I did what he said to do and my lawn mower started!! He could have very easily just said "bring it in" and charged me for service. I appreciate that!!!

Very helpful. Knew what I needed and made sure they gave me a estimate before I ordered.read more

From the owner: We specialize in masonry, hardscapes and concrete construction materials. We have three convenient…read morelocations in Setauket-East Setauket, Brentwood, and Riverhead just off the L.I.E. We have beautiful displays and do deliveries from Montauk to Manhattan. Our sales team is happy to help you with any project, big or small.