Blue21 is a scale-up and global leader in developing floating urban projects based in Delft, The Netherlands. Blue21 has the mission to realize floating cities with a positive impact on the planet. Floating city technology addresses many urgent global challenges such as climate change, urbanization, and land scarcity. In the company, a unique collaboration has been established between architects, urban designers, water managers, civil engineers, and maritime engineers. A strong link to governance, legal and social expertise is made through the Thinktank Governance of Floating Cities. Blue21 has an international client base including the USA, China, Japan, Singapore, Malaysia and various countries from Europe. The founder's team of Blue21 has been involved in the design, engineering, and realization of iconic floating projects such as the Floating Pavilion in Rotterdam, the Floating Ecohomes in Harnaschpolder, Delft and more recently, the INNOZOWA floating solar project.
| Website | http://www.blue21.nl |
| Revenue | $5 million |
| Employees | View employees |
| Address | 1 Paardenmarkt, Delft, South Holland, NL |
| Phone | +31 15 256 1872 |
| Industry | Architecture, Engineering & Design, Construction |
| Competitors | Foster + Partners, Sustainable Ocean Alliance, The Seasteading Institute, Oceanix, Waterstudio.NL, WikiHouse, Rondal, OceanBuilders, Breeam, blueHOMES AG +6 more (view full list) |
| SIC | SIC Code 871 Companies, SIC Code 87 Companies |
| NAICS | NAICS Code 5413 Companies, NAICS Code 54131 Companies, NAICS Code 54 Companies, NAICS Code 541 Companies |
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Blue21 Questions
The Blue21 annual revenue was $5 million in 2026.
Blue21 is based in Delft, South Holland.
The NAICS codes for Blue21 are [5413, 54131, 54, 541].
The SIC codes for Blue21 are [871, 87].
