Monday – Friday: 7:00 am – 4:00 pm
Saturday: 7:00 am – 3:00 pm
Riverhead Building Supply is conveniently located near the train station in Southampton at 40 Powell Avenue.
Across the street at 25 Powell Avenue is our Door & Window Showroom which features windows, doors, molding, trim and more. Both builders and homeowners utilize our Showroom to get inspiration and touch & feel doors and windows from well-known brands like Andersen, Marvin, and ThermaTru. Stop by for your everyday hardware needs from hoses to power tools. Homeowners welcome!