Unlock the potential of 6 Windsor St, Andover. Over 4,300 SF across 4 levels, ideal for offices, wellness, or medical spa. Updates include new windows, full kitchen, W/D, upgraded electrical, plumbing, HVAC, fire safety, 2″ water main, fire/sprinkler system & generator. ADA access w/ ramp & compliant bath. Detached 3-car garage, off-street parking. Private basement entry offers expansion or income potential w/ approvals. General Business zoning w/ great visibility, near major routes, transit & 35 min to Logan & Manchester airports.