What was the cost of buckingham palace?

Buckingham Palace was originally a large townhouse known as Buckingham House, which was built for the Duke of Buckingham in 1703. King George III bought the house in 1761 and extended it into a palace. The architect John Nash was commissioned to remodel Buckingham Palace in 1825, and the East Wing was added in 1847. The palace was further extended by Queen Victoria in the 1850s, with the addition of the West Wing and the Marble Arch. The total cost of building and extending Buckingham Palace is estimated to have been around £700,000 (equivalent to approximately £45 million in 2020).