St Andrew, with the address of 1 High Street, is a 19th-century residential building in Llandaff, Cardiff, Wales.

[1] The garden wall of St Andrew is also a Grade II structure.

John Newman, in his Glamorgan volume of the Pevsner Buildings of Wales series, notes St Andrew's “engaging corbelled chimneystacks”.

[5] On 16 August 2019, a Blue Plaque was unveiled on the building to commemorate Sir Tasker Watkins' association with Llandaff,[6] and the house that he lived in between 1945 and 1955.

[5] In October 2022, the house was put up for sale for £1 million by the representative body of the Church in Wales.