Knip departed from the traditional styles of the Dutch Golden Age. He focused on the clear light and geometry of the Italian countryside. His compositions often feature Roman architecture and rural vistas. In View of Cittaducale, he uses precise lines and balanced proportions. He frequently worked with sepia washes and watercolours to define the shape of buildings. His work is defined by a sense of stillness and order.

Modern collectors value Knip for his architectural accuracy and muted palettes. His depictions of Genzano and the Villa Mattei offer a calm aesthetic for contemporary interiors. These prints provide a window into nineteenth-century Italy without being overly sentimental. The structural quality of his work suits minimalist or traditional decor. His views of Houses in Rome in the Foreground remain popular for their graphic clarity.