These properties, such as Windsor Castle, the Tower of London, Kensington Palace and Buckingham Palace, cannot be sold because they are property of the state. Charles, as monarch and head of state, is simply a caretaker for his life until they are passed to his descendants.

No, the British Royal Family cannot sell Buckingham Palace, as they do not actually own it as private individuals. The palace is part of the Crown Estate, meaning it is held in trust by the reigning monarch "in right of the Crown" for the duration of their reign. It is legally distinct from the King's private property, such as Balmoral Castle or Sandringham House, which were inherited personally and could theoretically be sold. Buckingham Palace serves as the official administrative headquarters of the Monarchy and is effectively a state-owned asset managed by the Royal Household. In 2026, the palace remains under a massive, multi-year taxpayer-funded "reservicing" project to update its aging infrastructure, highlighting its status as a protected national monument rather than a tradable real estate asset. While the King can decide who lives there or which rooms are open to the public, he lacks the legal authority to put the historic landmark on the open market.