24400 Jefferson Ave.  
St. Clair Shores MI 48080

https://jbys.com/our-locations/st-clair-shores-office-hq/

Our headquarters and main office is centered on the Nautical Mile in St. Clair Shores, Michigan. The showroom and award-winning service facility is located at Jefferson Beach Marina on Lake St. Clair. Jefferson Beach Marina is full service and has 774 slips with access to 30- and 100-ton travel lifts. The marina offers outdoor and indoor heated storage and has slips to accommodate yachts as large as 130′ in length.