�Kate Moss is the latest in a string of Highgate celebrities to apply for a basement extension. The Croydon-born supermodel hopes to build a steam room and kitchen in the lower ground floor of her home.

She also wants to install eight CCTV cameras to the outside of the Grade II-listed building, off Hampstead Lane.

Her planning application will come before Camden Council later this year.

It comes just three months after her near neighbour, actor Jude Law, lodged a similar request.

The move is likely to spark controversy as Highgate campaigners fear that such basement excavations can contribute to the overdevelopment of a prized conservation area.

They also fear they can divert underground water channels and prevent fresh water from flowing into Hampstead Heath’s ponds.

Highgate ward councillor Maya de Souza is urging the planning committee to turn down the application if it doesn’t meet guidelines.

She said: “My concern is and continues to be the impact on groundwater flows.

“This has been known to impact severely on neighbouring properties and can affect water bodies like our Highgate ponds as well as causing construction-related nuisance.

“Large basements, like the one we opposed at Fitzroy Farm, can mean huge numbers of lorry movements which cause too much of a disturbance and a risk to other residents.

“In this case, I’ll be asking for proper reports on groundwater and the early submission of a construction management plan and, if these are not satisfactory, I’d like to see the application refused.”

Mr Law recently met with representatives from the conservation group The Highgate Society to discuss his basement plans.

But, so far, newly-married Ms Moss has not made a similar approach. She moved into the house – the former home of Romantic poet Samuel Taylor Coleridge – earlier this year. It is thought to have cost nearly �8million.

A Camden Council spokesman said that the authority had received one letter objecting to the submission.

Ms Moss was unavailable for comment because she is away on holiday in St Tropez.