TOWNHALL, ZOETERMEER

As green infrastructure becomes a central pillar of local climate adaptation policy, the Municipality of Zoetermeer chose to lead by example. The previously inaccessible 5th-floor rooftop of the city hall has been transformed into a multifunctional rooftop garden. With a maximum load capacity of just 250 kg/m², the existing gravel roof was replaced with lightweight modular planters (Jungle Boxes) and three Urban Trees. The result is a future-proof green roof that enhances cooling, water retention, and biodiversity.

The design is built around multifunctionality. The rooftop creates a social gathering space, buffers rainwater during peak storms, integrates solar powered charging facilities, and reduces urban heat through shade and evapotranspiration. At the same time, it improves building insulation and supports biodiversity with birdhouses and water features. The impact is immediate and measurable in use: the adjacent meeting room has become the most frequently booked space in the building.

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