His artistic method relied on the simplification of form and the use of broad watercolour washes. In works like Fishing Village and Summer Day, Sussman reduced buildings and hills to their basic geometric components. He avoided the use of fine lines or decorative details. This technique creates a sense of space through the careful placement of colour blocks. His compositions are balanced and quiet, focusing on the essential structure of a scene.

Collectors today appreciate the graphic clarity found in Sussman's work. The flat planes of colour and architectural shapes make these prints suitable for modern living spaces. His work provides a window into mid-century American Modernism while maintaining a minimalist aesthetic. These compositions offer a calm, orderly view of the world that complements contemporary interior design.