I'm thinking of converting part of our double garage, to a teenage 'living room'.

Only the back half to two-thirds, the front will be retained for storage.

The two front doors are barn type, not the modern up and over type. There's a
double glazed window in the half to be converted. The construction is a single
skin of brick, with a pitched tiled roof. There are buttress at half-way
points on three walls, plus between the two front doors. The garage is totally
detached from the house. There's an access door in the side.

AIUI it needs to be insulated to certain standards, this can be achieved by
insulation trapped within a timber frame, and plaster board skin ?

The external appearance of the garage will be totally unaffected.

What planning hoops I'm I likely to have to jump through ?

Any experience from members of this group would be appreciated.

TIA

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Mark
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