Your global leading expert in floating architecture and urban development.


We design, research and realize floating projects in delta cities world-wide. Our belief is that we must shift from sustaining our planet to restoring it. Floating development can make cities more resilient, creates space for new eco-systems and enables bio-based economies to flourish.


Do you see the potential of floating for your company, city, or municipality but don’t know where to start?




What's New

Built artificial islands to take off

This autumn Blue21 was featured in Le Monde. The article elaborates on seasteading and [email protected], quoting Blue21’s architect and CEO Bart Roeffen: “We […]

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Floating Schiphol is good for everyone, even the fish

Schiphol at sea is slowly but surely coming into the picture again as a future perspective for aviation.

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Intern vacancy: Game designer wanted!

Are you a fan of virtual reality? Blue21 is looking for a motivated game design intern who is interested in […]

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Check out the Sea Sights Festival

This festival offers a peek into the future of cities at sea. From 19th to 21st of October on and […]

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