I would like to know do i need planning permission to build a second floor bedroom with ensuite on top of my garage or is rear corner of my garage to close to my boundary line
Quite likely that you will need to demolish and rebuild the garage too as they often have thin walls and inadequate foundations. You will need to dig some trial holes to check foundations.
Each council has their own planning permission guidelines on what they will allow so look for them on line or call the planning office
Usual comments but get somebody to prepare architectural drawings and submit a planning application and ,if approved , a Full Plans Submission for building regulations approval.
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