Holbrook Communities Holbrook is a collection of active adult living communities located in the Southeast United States. We’re not your average adult community. We’re beacons of experiencing life at its boldest and most passionate. We exist to inspire wonder in our residents, and the world around us. Holbrook stands apart from other active living communities in attitude and outlook. We’ve developed a multitude of clubs, programs, activities and expeditions that tap passions from all walks. From our cycling club to group excursions to places like Mt. Kilimanjaro, you will find like-minded, energetic and exuberant neighbors to live, love, and share with.