Sandra Hambley left a successful career in financial services to launch Signature Design Interiors over 20 years ago—driven by a passion for creating spaces that are both beautiful and functional. Today, she leads a team of talented interior decorators, space-planning experts, and remodeling professionals who specialize in everything from sophisticated and comfortable living spaces to full-scale kitchen, bath and basement renovations.

As a Class A contractor licensed in Virginia and Washington, D.C., Sandra brings a rare combination of interior design expertise and remodeling acumen—an advantage that allows SDI to offer a seamless experience from concept to completion. The company’s approach is about elevating each client’s personal style. Whether refreshing a single room or transforming an entire home, every project reflects the client’s lifestyle, personality, and vision—just with a polished, expertly curated touch.

SDI offers an extensive selection of custom furnishings, window treatments, lighting, and accessories, along with comprehensive project management to ensure a smooth and stress-free process. From pre-construction planning to final styling, SDI takes care of the details, allowing clients to enjoy the transformation without the overwhelm. This commitment to excellence has earned Best of Houzz Awards for 11 consecutive years and has over 100 five-star reviews on Houzz and Google.

Sandra and her team have studied advanced design concepts with internationally acclaimed designer Mary Gilliatt in the U.S. and France. Passionate about business and mentorship, she has also taught decorating and entrepreneurship courses at Prince George’s County Community College in Maryland and Fairfax County in Virginia.

A native of western Pennsylvania and a proud Penn State alumna, Sandra has called Fairfax County home for over 30 years. She and her husband stay busy raising two sons, with highlights of the year including summer trips to Bethany Beach and travels abroad.