The 2015 edition of the Pevsner guide to Suffolk East by James Bettley in the Wrentham entry says: "Old Guildhall, opposite E end of the church. C16, timber-framed and plastered, with a C19 brick extension at the S end. Roof with moulded queenposts."
The Historic England listing information is here.
The Historic England listing information is here.
For information on buildings mentioned in the Pevsner guide to Suffolk in this location see pevsnersuffolk.co.uk