Connect with Top-Rated Interior Designers in Mercer Island!

Colleen Knowles Interior Design is a luxury residential design firm based in Mercer Island, Washington, offering exceptional design services to prominent homeowners in Greater Seattle and the San Juan Islands. With 30 years of experience, our team provides unique interiors and exceptional service, ensuring seamless project execution and enhancing the value and beauty of our clients' homes.

At ID by Gwen, we provide customized services in Interior Design & Decorating on Mercer Island and throughout the Seattle area. Whether you are looking for a home makeover or to refresh your furnishings, we strive to turn your projects into a success story! We are known for our integrity and the measurable value of our interior design and decorating services. We work in partnership with each of our clients and are committed to actualize their vision on time and within their budget. We offer personalized services delivered on time and on budget, providing design consultation, kitchen and bath design, space planning, drafting and 3D renderings, fixture and finish selection, furnishings and home decor, and wedding registry and room makeover services. A satisfied client is our ultimate reward!