The 2015 edition of the Pevsner guide to Suffolk West says: "The W side of the churchyard is the upper part of the High Street, and opposite the W door of the church Nos 20-21, with jettied front, is the former guildhall. C14, with crown-post roof and smoke blackened timbers."
The Historic England listing details are here and refers to "reputed to have been the Old Guildhall" which adds a degree of doubt.
The Historic England listing details are here and refers to "reputed to have been the Old Guildhall" which adds a degree of doubt.
For information on buildings mentioned in the Pevsner guide to Suffolk in this location see pevsnersuffolk.co.uk