Complex sentence: It was designed by William Kapp of the firm Smith Hinchman & Grylls in a Tudor-revival style and is European-inspired, however, most of the materials that were used to build the home were American-made.
Split into simpler sentences: It was designed by William Kapp of the firm Smith Hinchman & Grylls. It's designed in a Tudor-revival style and European-inspired, however, most of the materials that were used to build the home were American-made.