Revamp Your Boat With Concordia Company ASK ABOUT OUR BOAT REPAIR AND RESTORATION SERVICES IN SOUTH DARTMOUTH, MA Over the last 90 years, Concordia Company LLC has grown from a small yacht design business into one of the largest boat repair, boat restoration and sales companies in the South Dartmouth, MA area. Stop by our boatyard today to speak with a local expert about your boating needs. Call us now to discuss your boat restoration or repair project with an experienced boat mechanic.