Reinier de Graaf is a Dutch architect and writer. He is a partner in the Office for Metropolitan Architecture (OMA),

He is responsible for building and masterplanning projects in Europe, Russia, and the Middle East, including Al Daayan Health District in Doha, Norra Tornen in Stockholm (completed 2020), the nhow RAI Hotel in Amsterdam (completed 2020), Holland Green in London (completed 2016), Timmerhuis in Rotterdam (completed 2015), G-Star Headquarters in Amsterdam (completed 2014) and De Rotterdam (completed 2013).

Reinier is the co-founder of OMA’s think-tank AMO and Sir Arthur Marshall Visiting Professor of Urban Design at the University of Cambridge. He is the author of the critically acclaimed Four Walls and a Roof: The Complex Nature of a Simple Profession and the recently published novel The Masterplan.

He has overseen AMO’s increasing involvement in sustainability and energy planning, including Zeekracht: A Strategy for Masterplanning the North Sea; the publication in 2010 of Roadmap 2050: A Practical Guide to a Prosperous, Low-Carbon Europe with the European Climate Foundation; and The Energy Report, a global plan for 100 percent renewable energy by 2050, with the WWF.