The school occupies rooms in the Unitarian Society building in a wooded area centrally located in East Brunswick. The site provides space for both large and small group activities in addition to the Montessori classrooms and ample outside areas.

The new children's wing of the Unitarian Society opened in January 2001. The building addition contains three classrooms for the Montessori School.

The self-contained classrooms include one large room with a capacity for twenty-four children, ages 3-6, one smaller classroom for eighteen children ages 3-6, and one toddler classroom for 14 children starting at age eighteen months.

The building has its own main entrance and includes the office of the director, a kitchenette and a gathering room.