East Suffolk County Hall is a historic building located in St Helen's Street in Ipswich.

[1] The oldest part of the building was designed by William McIntosh Brooks in the Tudor style and completed in 1837.

[1] The design for this building, known as the "main entrance block", involved a roughly symmetrical 150 feet (46 m) main frontage facing St Helen's Street; the central section featured an arched doorway on the ground floor and a transomed window on the first floor flanked by twin castellated towers; there were also castellated side wings and two end pavilions which were slightly projected forwards.

[6] This was followed, on 16 November 1936, by the decision of King Edward VIII to announce his intention to marry Wallis Simpson which itself led to the abdication crisis.

[8] The Council moved to Endeavour House in Ipswich the following year and County Hall was acquired by a developer in 2005.