SIERRA SULLIVAN
Founder + Principal Designer
Sierra Sullivan spent over three decades in front of the camera as a model, artist, and photographer, before turning her eye toward the spaces people live in. That sequence was not accidental. It produced a designer whose aesthetic instincts were formed long before she touched a floor plan.
Her entry into design was personal. At 24, she restored a 1932 Spanish Monterey home in San Diego and never looked back. What that project confirmed was something she'd always known, which is that a home either has a point of view or it doesn't, and the ones that do change how people feel inside them.
Sierra works with clients who want that. She brings a considered eye to every project, works closely with architects and builders, and stays with a project until it feels like itself. Her work includes renovations, new homes, furnishings, and select commercial interiors. She is based in Laguna Beach and works throughout Orange County, San Francisco, and beyond.
WHAT IS THE FOURTH HOUSE?
In astrology, the fourth house is the House of Home, the place in a birth chart that governs roots, sanctuary, and the spaces we return to. It is where personal identity, family history, and the physical structure of a life come together.
It felt like the right name. Design, at its best, is exactly that: the creation of a place that feels like it was always meant to be yours.
WHAT CLIENTS SAY.
“Sierra transformed our room with thoughtful details that balance beauty and function, from the refinished heirloom coffee table and painted brick fireplace to a custom storage bench for toys and blankets. Her eye, calm guidance, and care made the entire process a joy. We highly recommend her.”
— Karin R. | Arroyo Project —
“Sierra transformed our San Francisco showroom into a space that feels both elevated and welcoming, with custom lighting, thoughtful display features, and a layout that beautifully supports the customer experience. She understood our vision, delivered on time and within budget, and created a space that continues to receive compliments.”
— Christian G. | Post Project —