Sutton Castle, Dublin, Victorian Tudor-style mansion in Howth Head, Ireland

Sutton Castle is a four-storey building with red terracotta roof tiles, Art Deco chimneys, and a Gothic porch that rises over terraced levels. The property overlooks Dublin Bay and is now divided into residential apartments.

Sutton Castle was built around 1880 for industrialist and politician Andrew Jameson, great-grandson of John Jameson, to designs by Manchester architect Alfred Darbyshire, replacing an earlier Sutton House. A fire in 1925, while newlyweds Jameson and Ruth Hart were honeymooning in New York, damaged the house, which was later restored. From the 1970s it served as a hotel, then as a centre for unaccompanied minors until 2001, before conversion into 17 apartments between 2003 and 2005.

The name Sutton comes from the townland of Sutton South, where the house stands; the castle name recalls a 16th-century stone castle house of the Hackett family that stood near the present gates. The hotel era left a mark in popular culture: Van Morrison stayed in 1974 and the grounds appeared on the cover of Veedon Fleece, and Bono and Ali Hewson held their wedding reception here in 1982.

The house is a private apartment complex and cannot be visited inside; the terraced gardens and the nearby Martello Tower at Red Rock, built in 1804, are what can be seen from outside. The complex lies in the townland of Sutton South on the southern side of Howth Head, above Dublin Bay, and is reached by the coast road and the DART line to Sutton. Eight apartments occupy the main house and nine the western extension.

A major fire destroyed the interior in 1925 while the owners were away in America, yet workers restored everything on-site with great care. The restoration preserved details so carefully that little remained visible of what had been repaired.