OUR STUDIO

“Design should reflect who you are - Not what’s trending.”

Founded by Nancy Rosett, Kostel Design began with a simple but radical mission: to disrupt the beige, risk-averse interiors that saturate the market. With a European-inspired, fashion-forward approach, we blend art, style, and spatial storytelling to craft spaces that feel unapologetically you.

We’re your creative co-conspirators—part designer, part stylist, part mood-setter. We turn up the volume on your personality and style so your home becomes a curated expression, not a catalog copy.

A woman in a lace suit walking across a couch in a luxurious room with chandeliers and wall sconces.

Our work celebrates individuality and style. We color outside the lines, but our process is refined and intentional — from concept to execution. We don’t follow trends; we set the mood.

From concept to completion, our team leads every phase of the design journey. We translate inspiration into reality through detailed layouts, material selections, FF&E schedules, design concept boards, renderings, furniture plans, and complete construction documentation.
Our studio thrives at the intersection of design and construction. We collaborate closely with architects, builders, and artisans to ensure each detail — from framing to finishes — aligns with the design vision.
We believe the best design outcomes are built on open communication and meticulous planning. Detailed budgets, schedules, and weekly site meetings keep every project running smoothly and transparently.
Perfect for hosts and creative entrepreneurs: we create memorable, statement-making spaces that photograph beautifully and stay booked.
Jaime Rabin brings over two decades of experience in wellness and design to her collaboration with Kostel Design, integrating Feng Shui and energy alignment into every project. Her work reveals how subtle energetic shifts can elevate not just the look of a home but the way it feels, creating spaces that are balanced, inspiring, and deeply supportive to those who live in them.

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Kind Words From Past Clients

SNOWMASS

“My family and I are from Orange County and we bought our first Mountain house in Snowmass, Colorado this year. We fell in love with our dream home and felt that we needed to find the right interior designer to make it perfect. Thankfully, our good friend and realtor referred us to Nancy. Nancy embodies everything you would want in an interior designer. She is talented, passionate, and bold. She truly listened to exactly what we wanted and made all the right recommendations to complement our style and budget, which is so key. We were given just enough design options to where it didn’t feel overwhelming but just enough to where we felt that she thought of things we would never think of. Our kids love the cute additions to their rooms. Our light fixtures have made the biggest difference. My favorite is our kitchen. We have a limited amount of space. Our kitchen was all open shelving, which felt bare and not efficient at all. Nancy designed the perfect layout to make our space so efficient and SO beautiful. She is thoughtful and kind. And I’m so excited for the finishing touches. Thank YOU! We’ve gained a lifelong friend and I highly recommend her. “
-Jasmine
NURSERY

“Working with Nancy was an absolute game-changer for our home, especially as we prepared for our daughter's arrival and finally tackled our small laundry room. We initially felt overwhelmed, but Nancy provided calm, expert guidance every step of the way, turning both rooms into spaces we genuinely love. Nancy transformed the guest bedroom into a fun, girly nursery, helping select wallpaper, a rug, furniture, and decorative wall paneling. With a small laundry room, Nancy optimized the space with custom cabinetry and selected tiles and a countertop. Nancy has an incredible talent for blending stunning, personalized design with intensely practical, smart solutions. If you need someone who can deliver both whimsy and efficiency, she's the best.”
-Stefanie