See:

Therefore, the "Permitted Building Area" is 1000 x 0.8 = 800 m2 for the total area of building structures, not including underground spaces. No restrictions apply
http://www.greekblue.gr/artman/publish/article_248.shtml


... Restricted Business zone regulations to permit the erection of an office building exceeding the permitted building area on a plot not having the required width.
https://news.google.com/newspapers?nid=1916&dat=19770806&id=...

calculating the permitted building area synonyms, antonyms, English dictionary, English language, definition, see also 'calculation',calculate',calculated' ...
http://dictionary.reverso.net/english-synonyms/calculating t...


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Note added at 3 hrs (2017-02-04 12:32:23 GMT)
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Also see:

8 Nov 2006 - Dreaming to be an Ex-pat and Settling Down in GREECE? .... design to be passed as the permitted building area is a known quantity anyway.
http://www.britsincrete.co.uk/cgi-bin/bicforum/YaBB.pl?num=1...

The permitted building area is 600sq.m. ... We offer you a panoramic plot of land with a nice sea view in Ammouliani island near the Athos mount in Greece.
http://www.icbproperties.com/en/offers/land/athos/9935

Kos Greek RealEstate - Technical and realestate file projects, constructions, real ... telephone and electricity, the permitted building area is 193 sq. meters and ..
http://www.kosrealestate.gr/pdetails.asp?lng=en&id=Κ-303

You could also say, “exceeding the permitted land to building ratio”. See:

16 Oct 2013 - adequate parking to maximize the permitted land to building ratio under this zoning. All physical deterioration would be eliminated in a new .
http://www.cohb.org/files/2014-06-16 HBCRA/Item 11A/SUPP_DOC...