In the United Kingdom, the term listed building refers to a building or other structure officially designated as being of "exceptional architectural or historic special interest"; Grade I structures are those considered to be "buildings of "exceptional interest, sometimes considered to be internationally important. Just 2.5% of listed buildings are Grade I." The total number of listed buildings in England is 372,905. In England, the authority for listing under the Planning (Listed Buildings and Conservation Areas) Act 1990 rests with English Heritage, a non-departmental public body sponsored by the Department for Culture, Media and Sport.
Ipswich is an unparished area, like many urbanized districts, with only 85% of the town population actually living in the area of the borough.
|Name||Location||Type||Completed [note 1]||Date designated||Grid ref.[note 2]
|Entry number [note 3]||Image||Ref.|
|Christchurch Mansion||Ipswich||Country House||1548||19 December 1951||1037784|||
|Church of St Margaret||St Margaret's Green, Ipswich||Church||Early 15th century||19 December 1951||1374813|||
|Church of St Mary at Stoke||Ipswich||Church||14th century||19 December 1951||1235601|||
|Gateway to Wolsey's College of St Mary||College Street, Ipswich||Gate||1528||19 December 1951||1206515|||
|80 and 80a Fore Street, including Warehouses to Rear (the Saleroom, the Crossway and Warehouse to South Fronting Wherry Quay),||Ipswich||House||17th century||19 December 1951||1025070|||
|Pykenham||Northgate Street, Ipswich||House||16th century||19 December 1951||1037724|||
|Pykenham's Gateway and Brick Boundary Wall||Northgate Street, Ipswich||Gateway||15th century||19 December 1951||1207459|||
|The Ancient House||Butter market, Ipswich||House||1567||19 December 1951||1037756|||
|The Willis Building||Friars Street, Ipswich||Office||1975||25 April 1991||1237417|||
|Unitarian Chapel||Friars Street, Ipswich||Chapel||1700||19 December 1951||1037739|||
|No. 2 St Peter's Street||Ipswich||House||Late C17-Early 18th century||19 December 1951||1235370|||
Media related to Grade I listed buildings in Ipswich at Wikimedia Commons