Quoting: Rocky
where do i stand with planning permission for that?
Planning will be the easy bit, especially as it's not a habitable area. Building control, however, is alot more complex.
I'd love to make this "extension" of mine out of bricks and mortar but the building control is a headache.
Your best bet is to see someone at your local council re. planning but mainly building control.
They're normally quite helpful and will give you advice and leaflets . . . remember that all local councils' requirements are slightly different so never assume anything without seeing an "official" first.
The regs for garages are relatively simple, in comparison to rooms.
Planning is pretty much guaranteed (providing you're within certain heights, volumes and are not within certain property boundaries).
You can issue your own drawings (handdrawn or CAD) but it's normally beneficial to employ a draftsman to do the work for you as they'll have some grasp of what's going to be asked for (what spec glass for windows, what/where ventillation strips, foundation make up, DPM . . etc)
It'll cost you more this way but will save MAJOR hassle with it constantly being rejected for silly little omissions.