New details have emerged in the case of the four-storey apartment building that collapsed on Alkminis Street in Petralona, with reports indicating that a new luxury residential complex was planned on the adjoining plot.

According to the same information, the project involved a five-storey apartment building with a basement, attic and entrance lobby, to be built directly next to the older block that has now collapsed.

The development, reportedly designed by two architect-engineers, was presented as a modern, high-end residential project in one of central Athens’ increasingly sought-after neighbourhoods.

Photorealistic images included in the project presentation show a carefully designed building with a minimalist aesthetic, large terraces, bright interiors and contemporary materials.

The complex was promoted as a premium urban investment in the Kerameikos–Petralona–Thiseio area, a short distance from Philopappou Hill and the walking route towards the Acropolis.

According to the project description, the new building would offer strong transport connections, with access to three metro stations and major roads including Piraeus Street and Petrou Ralli Street.

It was also marketed as a new urban living concept, close to cafés, bakeries, restaurants, supermarkets, pharmacies, schools, co-working spaces and sports facilities such as the Serafeio City of Athens.

Particular emphasis was placed on the building’s technical specifications. The presentation referred to reinforced concrete construction with enhanced seismic standards, full thermal and sound insulation, an energy-efficient façade, low-consumption LED lighting, smart home systems, marble communal areas and electric vehicle charging infrastructure.

It also highlighted large private terraces, natural light, dual-aspect apartments and premium materials, features aimed both at discerning buyers and investors seeking high-value property in central Athens.

Following the collapse of the older building, however, attention has shifted from the commercial value and architectural identity of the project to a more serious question: whether a development of this scale, rising to five storeys beside older buildings, could be carried out without placing structural strain on neighbouring properties.

The case is now under close scrutiny by the authorities, who are examining whether excavation and foundation works for the planned new apartment block may be linked to the collapse.

See photos of the planned residential complex below.