Merrimac Commons has 118 units in seven buildings. The site includes two multi-unit buildings and five single-unit buildings. Five single-unit buildings contain one unit each. The multi-unit buildings contain the other units. Units have two bedrooms. Unit sizes range from 1200 to 2050 square feet. The community mixes multi-unit and single-unit buildings on the same property. Merrimac Commons serves older adults as an Adult Community. The community allows pets with restrictions. Amenities include Bike Path, Park, Conservation Area, Public Transportation, Highway Access, and House of Worship. Residents use the Bike Path and Park for outdoor activity. Residents use Public Transportation and Highway Access for travel. All units include two bedrooms within the 1200 to 2050 square foot range. Adult Community is a feature and the community serves older adults.