Windsor House is a commercial development located on Gloucester Road in Causeway Bay, Hong Kong, comprising a shopping centre with an office tower above.

Causeway Bay is an area and a bay on Hong Kong Island, Hong Kong, straddling the border of the Eastern and the Wan Chai districts. It is a major shopping, leisure and cultural centre in Hong Kong, with a number of major shopping centres. The rents in the shopping areas of Causeway Bay were ranked as the world's most expensive for the second year in a row in 2013, after overtaking New York City's Fifth Avenue in 2012. When referring to the area, the Cantonese name is never written in English as "Tung Lo Wan".