Cleaning spray paint off a masonry facade is never just a washdown, and London is getting an expensive reminder. British media reported that authorities have spent roughly £150,000 dealing with several Banksy works, and the total is still climbing as removal efforts continue.
The priciest case involves a Banksy piece that appeared in September 2025 on the Royal Court building in London. Because the building is a listed monument, officials had to restore the facade to its original appearance. The UK Ministry of Justice said about £50,000 went toward attempts to remove the artwork, plus another £35,000 for added security and overtime for security staff. Conventional cleaning methods failed to deliver the result authorities needed, so specialists are now using laser technology. If laser cleaning fails, crews move to replacing damaged masonry elements, which drives costs higher.
Westminster City Council also spent close to £60,000 after another Banksy work appeared at Waterloo Place near Trafalgar Square. Officials installed protective barriers, arranged round-the-clock security, and handled the administrative steps that followed as the location drew crowds.
In a separate August 2024 incident in the City of London, Banksy painted an old police booth to resemble an “aquarium,” complete with a school of piranhas. The structure was dismantled, with costs reported at about £2,200. Unlike other cases, officials decided to preserve that piece, and it is planned for public display at the London Museum.
For mason contractors and restoration teams, the story is a clear lesson in total job cost. Owners and public agencies pay for security, access control, specialty cleaning like lasers, and repairs when removal damages brick, stone, or mortar. On protected buildings, the finish standard is strict, and that pushes crews toward higher-skill, higher-cost options fast.
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