Grade I listed buildings in England completed in the 20th century

[note 2] Of these, there are twenty-four cathedrals, churches and chapels, nineteen war memorials,[note 3] seventeen houses, seven memorials, seven university buildings and seven office blocks, four art and museum galleries, three apartment blocks, three military installations and three bridges, two telescopes, two sets of gates, two factories, two animal enclosures and a range of other structures including an orangery, a clinic and a concert hall.

Of architects whose work has been listed, the most prolific is Edwin Lutyens, with twenty-one structures to his own account, and two more in partnership, the gardens at Hestercombe House with Gertrude Jekyll, and Middleton Park with his son.

Lutyens is followed by Arne Jacobsen, with six buildings at St Catherine's College, Oxford including England's only Grade I listed bike shed.

[5] The Modernist Berthold Lubetkin has five buildings on the list, two in conjunction with Ove Arup, who is individually represented by his Kingsgate Bridge in Durham.

[10] The architects of the two listed military workshops at RAE Farnborough are unknown, while Bob Creer of the Air Ministry is credited with the Operations Room at RAF Uxbridge.