Old Mill House Coffee Share: Shopping & Specialty RetailCOFFEE SHOP/CAFEWomen-Owned Old Mill House Coffee Visit Website 24 Central Sq. Chelmsford, MA 01824 (978) 643-3033 Facebook Twitter Rep Info Map Whom to Contact Eileen DeChaves Owner Phone: (978) 643-3033 Send an Email What's Nearby? Distance: 5 10 15 20 25 50 mi.