This paper briefy introduces the fundamentals of an Integral Theory of Sustainable Design, drawing on the writings of American philosopher, Ken Wilber, including concepts of multiple perspectives (quadrants) and multiple levels of development complexity. It explores the implications for an integral approach to sustainable design. Integral Theory's multiple perspectives include basic perspectival distinctions of behaviors, systems, cultures, and experiences. For sustainable design, this approach includes subjective and objective value spheres in developing effective solutions to environmental problems. Each of these perspectives can be understood as unfolding in stages or waves of complexity, yielding a matrix of viewpoints and concerns. Daylighting is explored in greater detail, proposing an integral daylighting framework of four perspectives and three levels of complexity: the 12 Niches of Architectural Daylighting. The Bigelow Chapel at the United Theological Seminary in New Brighton, Minnesota is used as a case study for understanding architectural daylighting via the integral lens.