Construction on BBC Wales’ production centre started this month.
The studios, to be located in Cardiff Bay, will cover a 170,000sq ft site which will eventually house productions including CASUALTY.
Initial preparations have been completed, with the first foundations being laid yesterday at the site at Roath Basin.
Once the studios, offices and external filming lots are fully fitted out, filming will begin for CASUALTY in Autumn 2011.
The first episode of CASUALTY to be made in Wales will be on screens early in 2012.
Menna Richards, director of BBC Wales, said: ‘We have an ambitious timetable to work to, which we’ll deliver thanks to a combination of talent and excellent partnerships.’
Rodney Berman, leader of Cardiff council, said: ‘Cardiff is developing a very strong reputation as a creative industries hub. The development is becoming an increasingly important part of our local economy.’
The CASUALTY move, which was announced last year, has been of topical debate with many dismayed at the transferal from Bristol.