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Please contact the business for updated hours/services due to the COVID-19 advisory.

General Info
Speonk Lumber Corporation is a full-service supplier of lumber and building products. The firm has been serving Long Island since 1946. It offers a wide range of products, such as engineered/treated lumber, roofing, clear boards, interior/exterior doors and many more. In addition, Speonk Lumber Corporation also supplies cement products, millwork, cabinetry accessories, aluminum/cement products, glass/plexiglass and fences to its clients. Based in Speonk, N.Y., the firm serves as a liaison to the architectural industry and caters to all private/public builders. The company is Forest Stewardship Council (FSC) SCS-COC-002066 certified.
Regular Hours
Mon - Fri:
Extra Phones

Phone: (631) 325-2303

Phone: (631) 325-1020

Fax: (631) 325-1350

TollFree: (866) 370-3806

Andersen, Azek, Marvin, Valspar
Payment method
amex, cash, check, discover, invoicing available, master card, visa
Lumber, Building Materials, Doors, Frames, & Accessories, Home Centers, Windows


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Paul R.



Some of the boards on my oceanfront decking (installed by the previous owner) required replacement. Yet, figuring out the nature of the decking material, the manufacturer, style, color, and appropriate board length was no easy task. Fortunately, someone suggested I take a picture of the decking and consult with Speonk Lumber.
From the exterior, Speonk Lumber (SL) looks like a small-time operation in a small rural community. I thought: 'I doubt they have the necessary expertise to be helpful.'
How wrong I was!

The SL counter representative suggested I speak with John Glass.
He provided brochures, samples and expertise and we quickly determined that my decking was from the Azek Harvest Collection.

The price of the decking was comparable to other online offers. But that is only half of the story. John provided the names of several reputable contractors--one of whom did the work for me. He also determined that purchasing the decking in 16' lengths was most economical. He then arranged for SL to cut the decking to fit the size of my deck. When the scheduled date for the repair work fell through, John offered to store my material for several additional weeks and deliver the decking to my home.

All of these services were provided without charge. Throughout this extended process. I was impressed by the quality of service provided, his knowledge of decking materials, and his friendliness and courtesy.

My experience with John Glass and Speonk Lumber was about as good as it gets.