Keystone Builders, Inc.

About Us

Key Team MembersKeystone Builders, Inc. began in 1977 with little more than two employees and a dream. Today, Keystone is a premium builder operating in the Capital District of New York and its southern environs with many successful projects to its credit and a large roster of satisfied customers. With little or no advertising, Keystone believes that our solid reputation has been "built by word of mouth" because the source of our next customer is oftentimes one of our former homeowners. We are justifiably proud of the growth our company has experienced during the last quarter century. We now provide a full excavation and foundation service so that we can take your project from its very first step all the way to completion.

Meet the Keystone Builders key team members:

Stephen Bolduc


Steve began what was to become Keystone Builders in 1977 after receiving a BS Degree from Utica College of Syracuse University, majoring in Construction Technology and a four year apprenticeship with a local construction firm. In the following thirty plus years, there has hardly been a type of project that he hasn’t come across at least once. It is Steve’s expertise and vision that allow your dreams to become reality. Steve is a former Town of Bethlehem Business Person of the Year. He has single-handedly transformed the look of several of Delmar’s Four Corners signature buildings -- both 384 and 388 Kenwood Avenue – as well as the beloved “Bootery” building at 376 Delaware that now houses two businesses. This led to his reception of the 1997 “Community Appearance Honor Roll” award. In August of 2008, Steve was asked to participate on the Town of Bethlehem Delaware Avenue Hamlet Enhancement Study, Study Advisory Committee, which is in progress.

Steve’s ability to capture your ideas, vision and dreams for the future and transform them into the bricks and mortar of your new home is the key reason for Keystone’s continued success. Call him directly to start the process.
Bob Bolduc


Steve’s son, Bob, has been involved in Keystone’s projects for more than twenty years, and he now oversees the excavation and foundation portions of our construction. With his experience, he is able to match the right equipment to your specific needs. No need to “sub out” the foundation of your project and then delay starting because you are waiting for an excavator to fit you in. Contact Bob when you want to discuss anything from the septic system installation to the poured basement walls. No one knows more about concrete, and with his years of experience as a lead carpenter, Bob will get your project off to the right start.
Peggy Bolduc

Accounting, Accounts Payable/Accounts Receivable

Peggy has been with Keystone for over 10 years and is Steve’s daughter-in-law. Peggy is focused on the financial responsibilities of the business. She has also fostered positive interactive relationships with our employees, our financial and subcontractor partners and vendors who provide the invaluable services to make our projects successful for our customers. In addition, she partners with Mark Bolduc, Office Manager, to ensure effective coordination is achieved to support the entire organization.