Having seen and debated Calvinmiddle's 120 square metre 2 bedroom bungalow, I was musing on how large a dwelling actually needs to be in floor area - intending no particular critique of Calvin's decisions here.In these days of £1500 per square meter build costs and soaring energy prices, should we take Occam's Razor to all those (possibly) extra bits we are adding to our self-builds? Rather than learning creating larger rooms and learning to do that one extra building trade ourselves, to save bu