I've seen similar plywood inner walled buildings going up in the rear gardens of property Upper Parliament St, Princes Park, Toxteth. These are so called Mews property which front onto Upper Hampton St. They go for about £250,000 each. Not bad if you can get it.
One of the more frightening buildings I've seen is a 3 storey block of flats building on Smithdown Rd built of timber frame construction with a brick outer skin.