Μake us preferred on Google Elliniko Metro, the state-owned company overseeing construction of Athens Metro Line 4, has denied that the project is connected to flooding reported in the basements of a public building on Vasilissis Sofias Avenue, while acknowledging that no company engineer has inspected the property.
In a statement issued Wednesday, October 28, the company said monitoring instruments in the area had recorded no increase in groundwater levels. It also outlined the construction work currently underway near the site, including concrete work at Kolonaki station and limited excavation at a ventilation shaft.
The statement follows a report by To BHMA about flooding that occurred in the building approximately one month ago. Although the company ruled out a connection to the metro project, it confirmed that it had neither received a request to inspect the building nor carried out an inspection of its own.
Metro company cites groundwater measurements
According to Elliniko Metro, the tunnel excavation for Line 4 between Katechaki and Evangelismos was completed in February 2026, when the tunnel-boring machine named Athena reached the Evangelismos shaft.
The company said the only work currently being carried out in the area involves concreting at Kolonaki station and limited excavation at a ventilation shaft.
It added that piezometers — instruments used to monitor groundwater pressure and levels — have been installed as part of the project’s monitoring system. The measurements recorded so far have shown no rise in groundwater levels at the monitored locations, the company said.
On that basis, Elliniko Metro stated that the reported flooding was not connected to construction of Line 4.
Previous assurances in Kypseli came under scrutiny
The latest statement follows similar reassurances issued by the company after incidents in the Athens neighborhood of Kypseli in March, where residents reported problems involving their buildings during metro construction.
In an earlier response, Elliniko Metro said that inspections had found no problems with buildings’ structural adequacy or damage to their load-bearing structures, adding that instrument-based monitoring had detected no further progression of the phenomenon.
However, findings from subsequent expert inspections contradicted those assurances, according to To BHMA.
Residents of apartment buildings in Kypseli had also reported water accumulating in their basements from the outset.
The company’s latest statement addresses the reported flooding on Vasilissis Sofias Avenue but does not include findings from an inspection of the affected building, which it says has not taken place.
