Prince Harry and Meghan Markle
Prince Harry and Meghan Markle's panic room in Frogmore cottage sparks fury. Pictured: Prince Harry and Markle arrive at Westminster Abbey to attend a service to mark the centenary of the Armistice in central London on November 11, 2018. Getty Images/Tolga Akmen

Prince Harry and Meghan Markle's decision to move to Windsor can be costly.

Kensington Palace confirmed that the Duke and Duchess of Sussex are leaving the palace and will be staying at Frogmore Cottage early next year prior to the arrival of their firstborn. However, the move entails millions of money because the place needs tighter security.

Sources revealed that Prince Harry and Markle will include a panic room in their home, as discussed by the planners. This is reportedly a gift from the Queen. Unfortunately, this only sparked outrage among critics because it will be covered by the taxpayer-funded Sovereign Grant.

"In a world of growing homelessness, how can this be justified?" Labour's Kensington Palace MP Emma Dent Coad said (via Mirror).

Princess Diana's former protection officer, Ken Wharfe, also explained the expenses in transforming the grade II-listed Frogmore Cottage before Prince Harry and Markle's move there next year.

"The costs of building and security arrangements could balloon to £5 million ($6.4 million) in the first year," Wharfe said. "There is no protection at Frogmore, there is no one living there. There are costs of at least two or three private protection officers and to make sure the estate is policed adequately by Thames Valley Police. There will have to be major reviews of the security surrounding that property, exposed on virtually every side."

"It’ll be a dramatic rise to the taxpayer. Thames Valley is no different from any other service that has seen cuts of 20-25 percent, this will be a tremendous strain on their budget," he added. "It’s a mammoth task. The costs of fitting and maintaining security equipment, with fur­­ther officers in the area, could cost further millions each year."

Prince Harry and Markle's five-bedroom home is 200 meters from the public path. In addition, the other entrances are further away and in several areas, only a six-foot wall separates the property grounds from the public road.

According to earlier reports, Prince Harry and Markle had some tension with Prince William so they decided to leave. They reportedly don't want to live next to Prince William and Middleton.

However, another source claimed that it was actually Markle and Kate Middleton who had issues. The two duchesses are reportedly very different and couldn't get along well with each other.