Why are british builders, building tiny little houses with no storage space, gardens,or garages?

Thinking that all single people are all students and have no children, have they not seen the size of childrens toys recently and if you have a car, you may need to do work on it from time to time, if you do not use it for the car you certainly need it for storage, i viewed several houses recently as a single person with 6 storage containers of furniture which are the belongings i have built up and do not wish to dispose of. most houses i looked at had street parking or allocated parking lot. i do not drive or own a car so how am i going to utilise a parking lot. however in these tiny cubbyholes called bedrooms no wardrobes and no room to build any. i like a double bed which would have filled the master bedroom with no room even for bedside cabinets let alone wardrobes. the one broomcupboard also had to be utilised as housing gas and electric supplies. so i said to the agent where am i going to put my office, most people now own computers,printers,screens,piles of papers and a shredd?
Answer
Simple ...greed for more money !!!!!!!