The star at the front represents the Masons as I understand and it feels like an austere frontage for a building that is still in use. It was constructed in the late nineteenth century, but the building was badly damaged in the Great Flood of 1953 which caused substantial damage to the coastline of East Anglia.
The frontage did have windows at the time of the Great Flood, so I suspect that they were removed during the repair of the building in the late 1950s. Despite a large number of buildings in the area being listed, this one hasn’t been which also means that I haven’t been able to discover much more about its history. I found it interesting though with its frontage and was pleased to see it’s still used for community events. They’ve got a web-site at https://harwichmasonichall.co.uk/.