Grand plans: Cheryl and Liam Payne plan huge extension to double the size of their multi-million Surrey mansion

Cheryl and Liam Payne are hoping to almost double the size of their multi-million Surrey mansion.

The singers have submitted plans to Woking Borough Council for a huge garage linking the six-bedroom main house and spa to a detached guest house.

The couple, who moved in together early this year before welcoming their first son Bear in March, have sent in multiple extension requests since Liam bought the house for £5.1million in 2015.

Planning documents available online show that an application for the single-storey extension that now houses an indoor swimming pool, tropical garden, sauna and changing room was approved in May 2015. The go-ahead was then given five months later for an adjoining basement housing a fitness suite and games room. ​

That same year, Liam received permission to convert an existing detached garage into a guest house with a first-floor en-suite bedroom above two parking bays.

The new parents now want to interlink the buildings with a passageway running through another garage area that would house their £1million collection of cars, as illustrated in the below floor plan:

In total, the planned renovations will increase the original volume of the house by nearly three quarters.

The application reads: “The existing and original house has a footprint of 433 square metres, an overall floor area of 1,024 square metres and a cubic content of 3,437 cubic metres.

“The proposed extension, including the basement and two-bay garage would have a floor area of 473 square metres and a cubic content of 2,494 cubic metres.

“This amounts to a total increase of 71.8 per cent above the cubic content of the original dwelling.”

The council is expected to have reached a decision by 12 October.