They are part of 417 housing units planned for destruction in Epeule, out of nearly 1,500 across all four districts. The project was greenlighted in December 2022 despite complaints.
Europa Nostra, a pan-European federation for cultural heritage, has listed them in its ‘seven most endangered’ programme, a scheme to safeguard heritage monuments, in a bid to gain time.
“This is fragile heritage, because it's modest, hardly habitable by today's standards and rare. It must be preserved for the sake of the architecture, because it's a unique model of social life.†said Etienne Poncelet, member of Europa Nostra and honorary inspector of the Monuments historiques corps.
The ground floor accommodated the cooking, dining and washing, and at night transformed into a bedroom for children. The upper floor led to an attic where parents slept. Only the door and a single window let in light.
Meanwhile, the central courtyard featured communal elements such as a toilet or tool shed.
They were first mentioned in 1555 in an ordinance published by the municipality of Lille, already highlighting the risks they posed regarding the spread of disease, according to French historian Philippe Guignet.
Inhabitants, similarly, grew from seven to 10 or 12 per unit, claimed Mr Guignet.
They ballooned in the mid-19th century during the Industrial Revolution, particularly in Roubaix where the population swelled from 30,000 to 110,000 inhabitants.
“This sickly toddler in rags, barefoot, seems to have stepped out of a page of Oliver Twist. From the depths of the house comes the loud voice of the worker who has enjoyed the booze too much,†described an article in Le Monde on June 21, 1969.
Formerly a squat, Kawaa has rearranged the three buildings and opened up the courtyard, while the upper floors have been left unchanged.
The social impact of such a project is what Mr Baert and Mr Poncelet hope to champion elsewhere.

“We have become, in fact, an opposition group to the municipality’s policies and attitude. We have to find less obvious roads and resort to unconventional tactics to reopen discussion with city officials,†said Mr Baert. “At the heart of our initial ambition was to open a dialogue.â€