Penthouse Residence 601 presents an unparalleled opportunity atop 9 Central Street, a distinguished historic landmark in downtown Lowell. This former mill building, renowned for its architectural integrity, offers soaring ceiling heights, authentic exposed brick, and expansive industrial-scale windows that frame the vibrant cityscape. Through an established built-to-suit process, this exclusive top-floor residence grants its future owner complete creative freedom to define their living space, supported by an expert design-build team specializing in bespoke historic renovations. For those envisioning a custom luxury penthouse in the heart of Lowell's dynamic historic mill district, this represents a uniquely direct and refined path to ownership. Discover your vision: Schedule a private showing by appointment.