Our Interior Design Services. Henley Design is a full service interior design studio based in Salem, Massachusetts, and New London, New Hampshire. Our projects vary from decorating to full-scale renovations and new construction. Though the majority of our projects are located in Northern New England, we also manage several projects remotely, spanning across the country from New York to California. We collaborate with the best available artisans, craftsmen, contractors, builders, and design professionals to bring each of our projects to life. Our projects have been featured in Boston Globe Magazine, Northshore Home Magazine, Cape Cod Home, and Boston.com Real Estate.