About us

The Developer

Keystone Builders, LLC

Keystone Builders is a diversified builder/developer of both residential communities and commercial developments. The owner developer, Bob MacCormack has been in the construction industry for over 30 years with an attention to detail and design being at the forefront of all his projects. He has partnered in many successful residential developments and golf course communities throughout New Hampshire and Massachusetts. One of his current residential developments is Harvest Estates in Derry, NH.

Keystone Builders