dishwasher,
Please read my above post again, where I stated:
"As far as I can recall the first 40 sq is usually excluded, but this may vary from Council to Council so check it."
Its not the area of the of the garage your architect should be seeking to have deducted except insofar as this might be included in the 40 sqm.
Your architect should focus on this - the first 40 sqm could be deductible!
This may exceed the total garage area by a factor of 200% or more assuming a 2.6M x 5.0M garage.
I don't know where your proposed dwelling is located but here is the Contribution Scheme for Dun Laoghaire Rathdown County Council.
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Dún Laoghaire-Rathdown County Council
Development Contribution Scheme 2010-2017
(under Section 48, Planning & Development Act,2000, as amended)
Adopted by Dún Laoghaire-Rathdown County
Page 6, Section 10, Exemptions and Reductions, states as follows; -
EXEMPTIONS AND REDUCTIONS
10.
The following categories of development will be exempted from
the requirement to pay development contributions under the
Scheme, or will be required to pay a reduced contribution:
• The first 40 square metres of any residential extension,
including granny flats, shall be exempt from the contribution
scheme. All house extensions in excess of 40 square metres,
including family or “granny” flats, shall be assessed at €130
per square metre of residential development in respect of the
portion exceeding 40 square metres. Domestic extensions for
accommodation of disabled person(s) are exempted in full in
cases where a Disabled Persons Grant is approved.
You should carefully read your own Council's online Contributions Scheme as well as the relevant legislation.
This should be contained in Section 48, Planning & Development Act, 2000, in case there might be some confusion arising.
You can read the act online here:
http://www.irishstatutebook.ie/2000/en/act/pub/0030/print.html
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.