Triple-skin glass façade, south elevation — Frankfurt, 2024
A tower designed to breathe — where ecology and commerce become inseparable forces.
Frankfurt's banking district is one of the most contested skylines in Europe — a place where architectural ambition has, historically, prioritised height over humanity. Veritas Tower was conceived as a direct challenge to that inheritance.
The brief called for 112,000 square metres of premium commercial space on one of the city's most visible sites. What it did not call for — but what we argued for, at length and with persistence — was that this tower also become the first zero-carbon high-rise in the district.
We won that argument. The result is a building that generates more energy than it consumes, cools itself through geothermal exchange, and offers its occupants access to seven sky gardens suspended above the city — one every eighth floor, where plants filter air and people breathe differently at altitude.
The triple-skin glass façade is the building's most discussed element — and for good reason. Each skin plays a distinct role: the outer layer deflects wind load and precipitation; the middle cavity circulates pre-conditioned air, recovering heat in winter and expelling it in summer; the inner skin provides occupant comfort without mechanical support. The result is a building that behaves like a living membrane, constantly mediating between the city's climate and the needs of the 8,000 people who work within it.
The sky gardens are not an amenity added at the end of the design process. They were written into the structural logic from the first schematic sketch. Every eighth floor, a full floor plate is given over to planted space — a combination of high-altitude meadow grasses, filtered water features, and meeting zones open to unobstructed sky. These are not decorative. They are mechanical: cleaning air, regulating humidity, and giving workers a reason to take the stairs.
Below grade, four geothermal boreholes extend 200 metres into the Frankfurt aquifer, drawing stable 14°C water to manage the building's base cooling load. Combined with 4,200 square metres of integrated photovoltaic glass on the south and west elevations, Veritas Tower produces a net energy surplus — approximately 340 MWh annually — returned to the city grid. It is the first building in Frankfurt's banking district to be certified zero-carbon in operation.
