Sunning Plaza, Office tower in Causeway Bay, Hong Kong.

Sunning Plaza was a 30-storey office tower at 10 Hysan Avenue in Causeway Bay, designed by I. M. Pei with local architect Patrick Chan Ping-wah and completed in 1982. Its broad facade was a grid of rectangular glass panels between thin dark mullions, pale silver-green near the top and darker grey-black lower down, with a flat roofline and a strip of solid dark cladding along part of the left edge. The building was set back from the street to leave a large open plaza at its entrance.

Sunning Plaza was the second building on its plot. The first, Sunning House, opened in 1949 as Hysan's first apartment block and one of Hong Kong's earliest buildings with individually owned units; 60 were flats and 50 formed the Sunning Hostel run with China Travel Service, whose Champagne Room and Sunning Restaurant were well known. The 30-storey tower by I. M. Pei and Patrick Chan followed in 1982.

Sunning Plaza appeared on screen in John Woo's 1986 film A Better Tomorrow, which shot a scene in the open space before its entrance. The building also featured in the 1987 comedy It's a Drink, It's a Dream and in a 1988 advertisement for the English-language newspaper The Standard.

The building was directly connected to Causeway Bay MTR station through Exit F1, providing easy access. This connection made it a practical transportation hub in the busy district.

The building was demolished in 2013 to make way for Lee Garden Three, marking the end of a landmark that shaped the Causeway Bay skyline. This transformation shows how rapidly the city evolves and older structures give way to new development.