Chelmsford Crossings Share: ASSISTED LIVING Chelmsford Crossings Visit Website 199 Chelmsford Street Chelmsford, MA 01824 (978) 250-8855 (978) 250-2750 (fax) Facebook Twitter Hours: We are open 24 hours a day, 7 days a week. About Map About Award winning, full service assisted living community in Chelmsford, MA, designed with quality services as well as affordability in mind. Directions Off of US-3N, we're located off of exit 31. From 495 N or S, Take the RT-110 exit, Exit 34. What's Nearby? Distance: 5 10 15 20 25 50 mi.