Paris zoning rules make cheapest apartments deadly in heat
Parisian zoning rules meant to protect historic zinc roofs are preventing renters from cooling their top-floor apartments, turning the city's cheapest housing into a disproportionate health hazard.
As a historic heatwave pushes Paris temperatures past 40C, strict zoning regulations are preventing residents of top-floor apartments from installing basic cooling measures like roof insulation or shutters. The preservation rules, designed to protect the city's iconic zinc rooftops, are effectively trapping renters in dangerous heat.
The consequences are severe. A study by France's public health agency of the 2003 heatwave, which caused 15,000 deaths, found that living directly under a Paris roof increased the risk of death by more than fourfold. Research published in The Lancet Planetary Health in 2023 further showed that Paris carries the highest risk of heat-related deaths out of 30 European capitals.
The crisis highlights a sharp inequality in urban housing. Top-floor apartments under zinc roofs are often the smallest and cheapest options available, frequently occupied by students. Amelie Kenney, a 23-year-old recent graduate, shares a sixth-floor walk-up under a zinc roof with her partner for €735 a month.
“People find the rooftops of Paris charming. There’s the image of the attic room. But in reality, when you look at who lives in these apartments, it’s often students paying a great deal of money for a small room,” said Maider Olivier of the Foundation for Housing for the Disadvantaged. Because the apartments rely on single west-facing windows and lack cross-ventilation, residents cannot escape the heat that the metal roofs absorb and conduct.
About three-quarters of Paris rooftops are covered in zinc sheets, a material recognized by UNESCO for its cultural heritage value. However, regulations safeguarding this architectural legacy clash directly with the economic reality of climate adaptation.
“There are people who are unable to insulate their roofs or install shutters to block the sun and prevent their homes from overheating because of regulations to protect the rooftops,” Olivier said. “But these regulations which protect the rooftops of Paris do not protect the people who live beneath those rooftops.”
For renters like Kenney and her partner, the inability to modify the apartment forces them to rely on stopgaps like electric fans and cold showers. “It’s been the worst week that we’ve had in this apartment,” Kenney said. “It’s just baking in the whole afternoon and it’s impossible to just get a respite.”
Unlike modern commercial spaces like offices and cinemas, private apartments in densely populated Haussmann-style buildings rarely have air conditioning. As heatwaves become more frequent, the collision between heritage preservation and housing habitability poses a growing structural risk to Europe's urban real estate markets. It leaves the most economically vulnerable renters bearing the physical cost of inflexible zoning.
