The house which contestants begin their challenges is located at: Taskmaster House, Chiswick, London W4 3UL Google Maps Co-ordinates: 51.474645, -0.266591 Buy the book with 200 extraordinary tasks: Trailer Release date: 28 July, 2015 The property was listed for rental on 14 August, 2014 for more than £4000 PCM. For more images and information about the…