It depends on whether it is considered exempted development or not.
If your building is a protected structure, or in an architectural conservation area, then, yes, possibly you would.
Normally people rely on section 4 1 h of the planning and development act 2000 to carry out such works and not require permission.
My best advice is that you should try to be certain and talk to the planning officer for your area.
Even if you do need permission, sure what harm?
There are plenty of archtiects looking for work at the moment who will provide this service for a reasonable fee.
HTH
HTH
ONQ.
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All advice on AAM is remote from the situation and cannot be relied upon as a defence or support - in and of itself - should legal action be taken.
Competent legal and building professionals should be asked to advise in Real Life with rights to inspect and issue reports on the matters at hand.