Full-service design,
tailored to you.

Three 11 Interior Design is a full-service interior design firm dedicated to creating spaces that are both beautiful and functional. From initial consultations and space planning to custom furnishings, material selections, and turnkey project management, we handle every detail with creativity, expertise, and care. Every project is tailored to reflect the unique lifestyle and personality of each client.

A woman with long blonde hair smiling while holding three decorative pillows in a living room. The pillows are stacked, with a green one on top, a floral one in the middle, and a blue pillow at the bottom. Behind her, there is a beige sofa with multiple cushions and a wall decorated with delicate, ornate hardware and jewelry display boards.

Guided by collaboration and creativity.

At Three 11 Interior Design, our clients are at the heart of everything we do. We build lasting relationships through thoughtful, personalized design. Every home we touch reflects the individuality of its owners, guided by collaboration, creativity, and curiosity at every stage—from concept to completion.

Living room with light gray furniture, white decorative lamps, vases, artwork, and a chandelier, with a light-colored rug.
Sample swatches of fabric or carpet samples hanging on metal rings with wood and metal accents.
Shelf filled with binders labeled with titles such as 'Heritage,' 'Indienne,' 'Islander,' 'MESA,' and 'Modern Resources,' each with colorful decorative stickers and beige cords attached.

Our commitment to community.

Beyond transforming homes, Three 11 Interior Design is committed to making a positive impact in our community. Through partnerships, charitable initiatives, and volunteer efforts, we support causes that align with our values and help create spaces—both in homes and in the world—that inspire, uplift, and serve others.

Two women smiling in a well-decorated room with light-colored walls, a patterned pillows on a sofa, and artwork on the wall.

Proud to support these causes:

2025 CHOA Derby Sponsor
AJT Foundation Rollerball 2025 Sponsor

A badge with a purple circle and a beige rectangle. Inside the circle, it says "best of 2026" in white and beige cursive and block letters. The rectangle contains the words "my Alpharetta" with "my" in a purple circle and a white script font and "Alpharetta" in purple serif font. Below, it says "Best Interior Designer" in black text. 
Our Team

Leigh Nicholson

Founder & Principal Designer

Leigh Nicholson, founder, attended Georgia Southern University and the American College of the Applied Arts in Atlanta to earn a BA in Interior Design. She has over 25 years of experience in Residential Interior Design holding IIDA and Allied ASID memberships. Her passion is designing sophisticated, functional spaces with polished, timeless designs recognized for encompassing today's current trends. The most rewarding part for her is seeing the "happy tears" from clients when revealing completed projects. When not designing, Leigh enjoys working out at Orange Theory Fitness, spending time with her children, family and friends as well as traveling to warm, sunny destinations! She has three children, Ansley, Warren, and Grant along with family dog Rosie. 

A woman in a light gray blazer and white dress shirt smiling in front of an abstract colorful painting with pink, green, and blue hues.
A young woman with long brown hair, smiling, wearing a beige t-shirt, sitting in a room with white walls, a colorful abstract painting on the wall behind her, and a white curtain on the left side of the image.

Jaidyn Swarts

Junior Designer

Michael Gibson

Project Manager