The Soufli Border Guard Department has four cells with four sets of bunk beds and a total capacity of 32. Detention capacity is the same as in 2012, although the number of cells appears to have changed. A report by the Hellenic League of Human Rights on a visit in 2009 refers to three cells, two next to an old building and one in a different building. A later Pro Asyl report describes the detention area as a ‘cell [that] consists of two rooms, not separated from each other, a hallway, a small storage room for the garbage, two toilets and two showers’. The report refers to an additional cell located in the Police Department building, originally intended for detainees accused of criminal offences but also used for administrative detainees as well as ‘a disciplinary cell’.

The cells and sanitary facilities were described as clean, with good ventilation and lighting in 2023, and each bed had a mattress and a sheet. Conditions were also described as generally good in the reports following visits conducted in 2020, 2018 and 2013. Conditions were considerably worse before the renovation of the detention facilities in 2012. Several reports described the Soufli cell area as overcrowded, dirty, dilapidated, poorly lit, with inadequate sanitary facilities, insufficient mattresses and blankets and provision of personal hygiene items. Women, men and unaccompanied minors were held together, and rarely had access to outside space. Several ECtHR judgements against Greece refer to inadequate conditions in the Soufli Border Guard Department prior to 2014.

In 2020, the CPT found that people were detained in a disused truck or container parked inside the back yard of the Department for several hours. The container was described as very cold and dark, and reeking of urine. Bottles of urine found nearby by the CPT delegation suggest that detainees did not have access to toilet facilities and had to relieve themselves in this manner.

According to a 2023 CPT report, people are held in Soufli for no more than a few days.