I decided to start modelling the studio environment and kitchen bench just going off of a mixture of some of the images of building etc that Damien posted and also some I found. This also helped me to adjust the scale of Charlie accordingly and also gave us an idea of how big the kitchen, bed and couch should be.
I made an executive decision to skew some of the elements such as doors and windows to go with the "Surreal" world Charlie is living in.
Please note: that this colour isn't the final colour for the walls...it was only placed on model to assist in viewing.