- any statically independent construction that is entirely arbitrary,
- any arbitrary construction that has been subject to Law 4178/2013 and, based on at least one of the submitted Bulletins Arbitrary Structural Vulnerability Control (DEDOTA) concerning it, is classified as a high (Y) priority for further control,
- any arbitrary addition or modification or change of use that has been applied to buildings of importance category Σ2, Σ3 and Σ4, according to the Greek Anti-Seismic Regulation.
Buildings of importance Σ2 where a change of use has taken place which changes the importance to Σ3 or Σ4, on a surface of up to 1/3 of the total, are treated here as buildings of importance Σ2.
In the case of buildings which have been constructed before 1.1.1983, but the arbitrary addition or modification or change of use has been carried out later, the static adequacy study will must be prepared by simulating the entire construction and checking: (a) the previous section based on the anti-seismic regulation that was in force at the time of the permit or construction of the existing one and (b) the arbitrary addition or modification or change of use based on the corresponding anti-seismic regulation that was in force at the time of its implementation.
When a static adequacy study is not required:
A static adequacy study is not required but a technical report by a competent engineer is required in the following cases :
a) conversion of a semi-outdoor space into a closed one,
b) arbitrary constructions of ground floor balconies up to a percentage of 50% of the ground floor floor, provided that no “place” near pillars are created. Otherwise, the members and their connection to elements of the bearing organization are examined, which will be reinforced for possible local failures. In any case, the static adequacy of the arbitrary loft for vertical loads is checked,
c) arbitrary cantilever constructions that protrude up to 2.00 meters or arbitrary increases of their protrusion up to a percentage of 25%,
d) construction on the roof of buildings up to twenty percent (20%) of its surface,
e) underground spaces with a maximum surface area up to that of the ground floor, constructed with perimeter walls of brick masonry or reinforced concrete, which cover at least seventy-five percent (75%) of the perimeter,
f) converting a pilotis (pilotis) into a closed space with the addition of perimeter walls that cover at least seventy-five percent (75%) of the perimeter,
g) basements that have been cleared and are constructed with perimeter walls of brick masonry or reinforced concrete, which cover at least seventy-five percent (75%) of the perimeter,
h) statically independent auxiliary spaces of importance class Σ2 and floor plan area up to 25m2 each,
i) for arbitrary addition of a roof with metal or wooden trusses, the control is limited to the control of the structural elements of the roof as well as the connections with the supporting body of the existing body,
i) the total of unauthorized constructions per divided property or independent building is smaller in area than 25 sq.m.,
k) the total of unauthorized constructions per divided property or independent building does not cause an increase in vertical loads of more than 20% for importance category Σ2 according to the Greek Anti-Seismic Regulation (EAK) and 10% for importance categories Σ3 and Σ4 for this divided property or independent building, and
l) a seismic license has been issued and reinforcements have been implemented after 1.1.2000.
