The reported cost of the project is approximately £369 million.
For many people, the most surprising part is not the renovation itself but the decision that Charles and Camilla will not make the palace their permanent home.
Why Charles and Camilla Are Staying at Clarence House
Clarence House has been associated with Charles for decades.
Before becoming king, Charles lived there with Camilla, and the residence became closely connected with his public life as Prince of Wales.
Remaining there allows the King and Queen to preserve a familiar routine while Buckingham Palace is transformed into a more modern and accessible institution.
The decision also reflects changing ideas about how the monarchy should operate.
Buckingham Palace is enormous, historic, and expensive to maintain. It was built during a very different era, when the daily life of a monarch and the expectations surrounding the royal household were very different from those of today.
