We live in a lovely yet inner city Victorian street. We have four daughters in a 3 bed house and the eldest is fourteen. We are in desperate need for more living space (4 year old twins currently in 2nd reception room). Unable to afford a loft conversion, currently we are contemplating a build at the bottom of our small garden to create a bedroom/hangout for eldest with storage space. The twins could then move into her room thus freeing up much needed communal living space downstairs at relatively low cost. DH is concerned for daughters safety saying he wouldn't be so concerned if it was for a boy. His concerns mainly lie in 'weirdos' figuring out she is in there and trying to get in. It is however an enclosed square of gardens and only overlooked by a few houses. Also we are aware of building regs and that such spaces should only be used for occasional use. Just wanted to gauge what people think about the safety/appropriateness/pitfalls of a teenage girl living in a space a short distance from the house. If you have any experience of it even better...trying to figure out if it is a realistic plan...thanks x