permission for conversion of rear of garage

Any agent hired to take on the work will be able to assess your project and be able to determine and advise you if you a full planning application or a certificate of lawfulness is required as this depends on your existing property and available parking. More often than not a garage or part garage conversion requires a certificate of lawful rather than planning.

Planning permission would generally only be required if you are altering the appearance of the property or extending it, ( garage conversions often fall under permitted development rights and don't require planning permission anyway but always check with your LA.) however if you are converting our garage to a habitable room ( or in part ) then you would definatly require building regulation approval. hope this helps - mark

Go to a architect as you will need building regulations rather then planning permission. 95% of garage conversion will require no planning or come under permitted development. But your architect will advise.

Yes planning a building control unless it falls at or below of the square meters where you do not need the above it best to call your local planning department