On 2 February 2016, a planning application to Hertsmere Borough Council first revealed that Endemol had applied to build a new extension to the house, which would be its biggest renovation to the house since it was built in 2002. The documents teased a second house with another garden, as well as a new exterior set and interview studio. The old eviction set and eye studio were both demolished following the conclusion of "Celebrity Big Brother 17". It was later announced on 18 March 2016 that permission had been granted with no objections. Despite the overall extension, the new outdoor set was smaller than before, holding a capacity of just 400 compared to 470 beforehand.