Occupying over 1.4 million square feet in Downtown Buffalo, Seneca One aims to play a major role in finally connecting Main Street to Canalside to help reestablish our community as a waterfront city and deserving destination. Our remarkable footprint is peppered with restaurants, retailers, residences, and businesses – all paired with an unmatched view and buzzing atmosphere. With over 100 apartments at the base of the building, thousands of people working in the tower, and eateries that serve late into the evening, our Seneca One Tower will never fall asleep again.

Our building is home to a diverse workforce of more than 2,000 people working together to establish our region as a destination for entrepreneurs, innovation, talent, and investments. The Seneca One community is built on the foundation of collaboration: startups, global tech companies, aspiring entrepreneurs, and creatives are part of what invigorates this space and makes the views of action complete.


Seneca One Tower, located at 1 W Seneca Street Buffalo, New York, was constructed between 1969-1974 and contains over 1,200,000 square feet of space. The building was formerly known as One HSBC Center (1999-2013) and Marine Midland Center (1972-1999), and spans the southern end of Main Street under which Buffalo Metro Rail passes. Today, the 40-story building dominates Buffalo’s skyline standing at 529 feet high. It’s truly a sight to see.

In 2014, Douglas Jemal purchased the building and immediately got to work. Douglas Development is proud to be completely redeveloping Seneca One Tower, Buffalo’s tallest and most iconic building with 360-degree views across our Queen City. We continue to work to turn this historical skyscraper into a mixed-use facility to feature over 100 apartments, retail operations, and commercial space with its 360-degree views over WNY. Together, we’ll bring a new wave of energy downtown with the most anticipated development in our city’s modern history.