Services Heather Hilliard Design is a full-service interior architecture and design firm specializing in high-end residential interiors. We provide personalized service to clients desiring the finest workmanship, materials and design. Services include space planning; custom furnishings, details, and finishes; worldwide antique sourcing; color schemes and fine art selection. Examples of our work have been featured in Architectural Digest, Wall Street Journal, House Beautiful, Elle Décor, and California Homes. With projects throughout California, New York, Los Angeles and Hawaii, we accomplish the largest and most complex assignments with unmatched beauty and comfort.