[1] A deed of 1369, now in the possession of Eton College, refers to the "gildaule", and a charter of 1439 states that "pleas happening in the said borough ... shall be pleaded and holden in the guildhall there, before the mayor and bailiffs for the time being".

The younger Wren served as a Member of Parliament for Windsor and commissioned the statue of Prince George of Denmark in 1713 on the south end of the building with his name was engraved underneath.

[6] The 1829 extension was a two-storey building at the back of the existing hall, designed by James Bedborough.

On 9 April 2005, the wedding of Prince Charles and Camilla Parker Bowles took place there[7] and, on 21 December 2005, it hosted one of the first same sex civil partnership ceremonies to be held in England, that of Sir Elton John and David Furnish.

[8][9][10] On 12 March 2011, the new Windsor and Royal Borough Museum was officially opened in the Guildhall by Queen Elizabeth II.