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 — 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. 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.
“Working with Sierra from Fourth House Interiors was an absolute game-changer for the interior design of my new home. From the get-go, she demonstrated a remarkable level of professionalism and dedication. Her attention to detail and refined taste truly elevated the style of my new home. What sets her apart is her ability to truly listen and capture your unique style. Thanks to her expertise, my home now reflects my personality in every corner, guided by her exquisite sense of design. One of the things that impressed me the most about working with Sierra was her ability to stay on top of everything. Our project spanned over 5 months and she seamlessly managed communication with different vendors, ensuring that every aspect progressed smoothly. This level of organization and coordination made the entire process much less stressful for me. She truly cares about her clients and treats your home as if it’s her own with the level of care and thought she puts into all her decisions. You can trust that your vision for your home will not only be realized but exceeded in every possible way. I cannot recommend her enough. Thank you, Sierra!”
— Shauna G. | Primavera Project —
“Sierra's aesthetic details are stunning. Her vision transformed the room with beautiful touches like the refinished heirloom coffee table and the strategic painting of the brick walls to enhance the fireplace. The French Mattress Cushion for the long fireplace hearth is truly out of this world, and her guidance on selecting the perfect fabric for it was invaluable. Sierra successfully created a space that perfectly combines form and function, right down to the custom oak storage bench for toys and blankets. Not only is she an incredibly skilled professional, but Sierra is a very kind, calm, and sweet woman, a complete joy to work with. Before hiring her, I reviewed several of her past projects, and though they were quite different from our needs, it was immediately apparent she is capable of creating amazing spaces and satisfying the needs of many types of clients. We absolutely highly recommend her!”
— Karin R. | Arroyo Project —
“I recently worked with Sierra from Fourth House Interiors to design the showroom for my clothing brand in San Francisco, and I couldn’t be more thrilled with the results! From start to finish, her creativity, professionalism, and attention to detail transformed our space into a stunning, functional, and on-brand masterpiece. She took the time to understand our vision, incorporating sleek modern elements with a warm, inviting vibe that perfectly showcases our collections. The layout maximizes space and enhances the customer experience, with thoughtful touches like custom lighting and unique display features that make our brand stand out. Her ability to blend aesthetics with practicality is unmatched, and she completed the project on time and within budget. I’ve received countless compliments from clients and visitors alike. If you’re looking for an interior designer who delivers exceptional results, I highly recommend Sierra from Fourth House Interiors.”
— Christian G. | Post Project —
“Sierra, I’m so sorry I had to leave early today because I don’t think I really told you how much I appreciate you and your vision. EVERY morning I wake up so excited and happy to go downstairs and see my study, my living room, my kitchen, my family room and of course my bar…I take a tour every day and smile. It goes without saying that it is because of you…you gave me the courage to do Hague Blue in the study (I’ve loved it for years) and Skimming Stone, wallpaper and on and on. Sierra, I am so happy and content and once again love my home but most of all so grateful for you….you have a gift and a gift with people - I’ll be your biggest champion - thank you so much ♥️.”
— Shelley P. | Ironwood Project —