Coordinates: 53°22′25″N 2°55′17″W / 53.3735°N 2.9214°W
Sudley House is a historic house in Aigburth, Liverpool, England. Built in 1824 and much modified in the 1880s, it is now a museum and art gallery which contains the collection of George Holt, a shipping-line owner and former resident, in its original setting. It includes work by Thomas Gainsborough, Joshua Reynolds, Edwin Landseer, John Everett Millais and J. M. W. Turner.
The house was bequeathed to the city of Liverpool by Holt's daughter, Emma Georgina Holt, in 1944 and is now managed by National Museums Liverpool.
Sudley, as it was originally known, was completed in 1824 on land formerly owned by the Tarleton family as a two-storey ashlar house for Nicholas Robinson, a corn merchant who was Lord Mayor of Liverpool in 1828-1829. Robinson paid £4500 for the land.
Upon the death of Robinson in 1854, the house passed to his two daughters, who died in 1883. It then became the home of Victorian shipping-line owner and merchant George Holt in 1884.Pevsner says that the original design was probably by John Whiteside Casson and was modified by James Rhind when Holt purchased it. However, National Museums Liverpool say that the original architect is unknown, although there are features that suggest it may have been Thomas Harrison.