James Corden reportedly sparked uproar among his neighbours over claims the noise of drums coming from his £11.5 million mansion is causing disruption. The Gavin & Stacey star, 46, has sought planning permission to build a new outhouse at the bottom of his garden leaving residents in the exclusive area of his north-west London displeased. The TV presenter and actor moved into the mansion over Christmas with his wife, Julia Carey, and their three children, Max, 13, Carey ten, and seven-year-old Charlotte. It is unclear who the mystery drummer is.

More than 18 complaints have been lodged over the proposed "den" as neighbours worry about soundproofing, reports Mail Online. One irritated neighbour said the Corden family creates enough noise even without the planned "garden room" - which would be the size of a roomy one-bedroom flat. The neighbour told the local authority: “One of them plays the drums, which can often be heard on my terrace and occasionally inside my flat even with the windows closed. What happens if they decide to move the drum kit out of the house and put it in the den?”

Corden has been undergoing renovations to his mansion. He and his wife first installed a spiral staircase and interior balcony at the back of the house.

The latest plans show the on-screen star's hopes for a large building equipped with a sauna, pool, gym, kitchen, den and a covered terrace area.

One neighbour said: “This new structure threatens not just to intrude on this peaceful green space but to constitute an eyesore."

Another said: "It is highly intrusive, standing one metre from neighbours' boundaries.”

Neighbours have commissioned their own report on the impact on trees, with their expert disagreeing with Corden's application that no trees would be affected.

It said: "If this building is built, it is very likely that 'retained' trees will suffer and/or be removed."

Express have reached out to Corden's representatives for comment.