150 Baker Avenue Extension, Concord, MA A 75,000 SF multi-tenant class A office building. 85 Swanson Road, Boxborough, MA A 97,000 SF Class A Office Building located in Boxborough MA. 200 Baker Ave, Concord, MA A 51,000 SF Office Building located in Concord MA 321 Research Parkway, Meriden, CT A 50,000 SF multi-tenant class A office building. Click here to see current Office Space leasing availability.