Harry Styles is facing opposition from neighbours over his plans to build a "monster mansion"

He was granted permission in April to redevelop the site on the condition wildlife habitats, including hedgehog and bat boxes, were installed.

Under the proposals, Harry intends to build what has been described as a "monster mansion" featuring a master suite with four dressing rooms, a gallery, drawing room, TV room, basement cinema, pool, sauna, gym and landscaped garden with a water feature.

But some local residents have raised concerns.

One neighbour told The Telegraph: "It's sad living next to a building site all the time. This road didn't used to be like this.

"All the houses are now constantly being bought by millionaires and redone.

"There's another house down at the bottom of the road, which I'm sure will be bought up and renovated like the others.

"There's also unfortunately less community among the neighbours than there was since people have moved on from the area."

Two neighbours have lodged formal complaints to the council over Harry's plans, warning their legal rights to light could be affected.

Representatives for one homeowner wrote: "My client is also deeply concerned about their private legal Rights to Light that might be infringed by virtue of the implementation of the proposal or a similar scheme of this nature."

Another complaint said: "The building will be much larger in scale to all existing properties on the road, which are two stories, therefore out of scale.

"We appreciate that the building was originally three stories, and the planning application is to restore the building; however, the majority of the road did not exist when it was three stories, and the buildings that exist were outbuildings."

In planning submissions, Harry's representatives said: "The proposed development has been carefully crafted to bring the building back as one of the great Hampstead houses.

"It proposes to amalgamate the two houses, along with internal and alterations, extensions to the second, ground and lower ground floors, and extensive landscaping in order to reinstate and provide substantial enhancement to the Grade II listed building."

They added meetings had been held with residents who raised questions about daylight and construction disruption.

A daylight and sunlight study was subsequently commissioned, concluding there would be "a negligible impact on neighbouring properties in terms of daylight and sunlight".

Harry aims for the development to be completed by October 2027.