Serving New England and the surrounding areas



Property management and Real Estate Development

For more than 30 years, Stonegate has specialized in the development, management and leasing of commercial and residential properties throughout the Greater Boston area and beyond.

We currently manage over 750,000 sf of commercial and residential properties in our portfolio

Founded in 1988, and headquartered in Natick, MA for over 20 years, we have successfully developed over $190 million of residential and mixed-use properties.

Sean P. McGrath  founded Stonegate Group in 1988 and, ​as its Chief Executive Officer, leads asset management, acquisitions, sales, ​finance, and development. Sean’s ​decades of experience have afforded Stonegate the “real vision in real estate” ​that has guided the company to the success it currently enjoys.

Outside of his real estate endeavors, Sean has branched out to several other related businesses, including lending and joint ventures. He is also an owner and franchisee of 15 Dunkin’ stores in the Mid-Atlantic region, and
​he owns and operates several solar companies in ​both Massachusetts and California.

A member of several philanthropic organizations, Sean serves on the Finance Committee of the Roman Catholic Archdiocese of Boston, the Board of Trustees of the Nativity School of Worcester, and the Strategic Committee for the Catholic Schools of Boston. Past board positions have included the Meadowbrook ​School of Weston, the ​Museum of Science, and the Nativity School of New Bedford.

Stonegate has the vision to see past the ordinary

With our 24 / 7 maintenance staff and exemplary customer service, Stonegate is a full-service organization, ​developing and managing projects from the ground up with the assurance that our tenants are our # 1 priority.

We create high quality, attractive, community-friendly environments that enrich and revitalize our area neighborhoods for both our commercial and residential tenants alike.

From our ground-breaking historic restoration of Penny Savings Bank in Boston to our mixed-use ​development projects at Milk Street in Downtown Westborough to our redevelopment projects in Downtown Natick.