The EastEnders set revamp is set to cost the BBC over £15m, according to reports.
According to trade paper Broadcast, the budget could stretch even higher as specialist teams are brought in to give a makeover to the Elstree set.
The project will see the size of Albert Square and the surrounding areas increase by 20 per cent, while a provisional set will also be built to allow production to continue.
Contractors are due to begin work on the new set on February 24, with construction unlikely to be finished before 2018.
Executive producer Dominic Treadwell-Collins recently explained that the revamp would allow EastEnders to expand to include other areas in East London such as Shoreditch.
“The bigger and improved set will increase the potential for storylines, increase quality and meet the demands of future technology requirements,” he said.
“Crucially, it will open up new areas and opportunities that haven’t been possible before – all of which are in the best interest of our viewers.”