One Architecture & Urbanism (ONE)

A design and planning firm specializing in climate adaptation and waterfront infrastructure planning.

One Architecture & Urbanism (ONE) is an award-winning design and planning firm with offices in Amsterdam and New York. Established in 1995, the firm is known for its unique approach in which financial, technical, and organizational issues are addressed and resolved through design.

ONE is a global leader in large-scale climate adaptation and waterfront infrastructure planning. Under the leadership of founding principal Matthijs Bouw, ONE has been instrumental in the development of complex, multi-actor planning processes in the US, Europe, Latin America, and Southeast Asia. In their studios, designers work with engineers, policymakers, and communities to shape joint narratives, develop strategies, and implement projects.

ONE lead the a mangrove replanting project in the Water Window Challenge. Learn more about the project here.

Latest news and articles

Advancing climate and livelihood solutions in the Hindu Kush Himalaya region

We are pleased to announce the 21 finalists of the second round of the Hindu Kush Himalaya (HKH) Innovation Challenge for Entrepreneurs (HKH-ICE 2.0).

Meet the RISE Urban Innovation Challenge grantees

Six initiatives advancing inclusive, climate-resilient urban futures through innovation, collaboration, and community-led solutions

Where innovation meets climate resilience – reflections from the RAIN Challenge

Supporting East African innovators to build climate-resilient, nature-positive food systems through mentoring, funding, and connection.

The Hindu Kush Himalaya Innovation Challenge for Entrepreneurs (HKH-ICE) 2.0  is now open!

Together with the International Centre for Integrated Mountain Development (ICIMOD), we are pleased to launch the second round of HKH-ICE.

Looking ahead with gratitude and shared purpose

Thank you for your support in 2025. We look forward to collaborating with you in 2026.