Stephen Sills Associates is a full-service interior design firm located on Madison Avenue on Manhattan's Upper East Side. Stephen approaches projects with sensitivity to its architecture, enriching the vision of the client. With a fresh approach to classicism, Sills brings together furnishings that span four centuries and innovative choices of surfaces, textures, and colors.
Architectural Digest described his work as "a lucid synthesis of opulence, rigor and surprise."

The firm's work has been featured in Architectural Digest, Elle Décor, House & Garden, Vogue, W, New York Magazine, T Magazine, The Wall Street Journal, Harper's Bazaar, along with numerous International publications. In October of 2013, Stephen Sills Decoration, his long awaited monograph providing a glimpse into some of his most thoughtfully composed interiors, was received to enormous acclaim.

Current projects include: beachfront estates in Southampton, New York; Naples, Florida, and the US
Virgin Islands; 2 apartments in Miami; the conversion of 2 prewar buildings in Manhattan to luxury condominiums; and several apartments in Manhattan on Park and Fifth Avenues.