Tankhouse is a Brooklyn-based real estate development firm. We believe that building cities should be done locally, with transparency and accountability, with passion, and with an unwavering belief that better urban solutions can be found through a commitment to design and process. We are a group of professionals with expertise in architecture, urban design, finance, construction, management and education.

Our mission is to work with purpose alongside people and organizations that we admire.

Our focus is on the relationships that make our work possible.

Our ambition is to prove that a commitment to design makes for better buildings, more vibrant neighborhoods, and more connected communities.

Sam Alison-Mayne
Co-Founder

Sam is a real estate and construction specialist who has been committed to New York City’s urban environment since 2007. 

Sam grew up in Los Angeles and earned his BA in philosophy at UC Berkeley (2003). After spending years in the construction industry in NYC, Sam earned a master’s degree in real estate development from Columbia University (2013). Sam founded Tankhouse that same year. 

Sam has served as an adjunct professor at Columbia University and has been actively involved in graduate student mentorship. He currently serves on the board of the Fort Greene Park Conservancy and co-chairs the Steering Committee for the Gowanus Improvement District.

Sebastian Mendez
Co-Founder

Sebastian is a licensed architect with extensive design and construction experience. Prior to founding Tankhouse, Sebastian was an Associate Partner at Foster + Partners New York where he lead the design and project management for over 3 million square feet of residential, commercial and cultural projects throughout North and South America.

Sebastian earned his master's degree in architecture from the University of Buenos Aires (2002) and a master's degree in real estate development at New York University’s Schack Institute. Sebastian has held teaching positions at the University of Buenos Aires and the Boston Architectural College.