In 1947, he published Paul Laszlo: Interiors/Exteriors (Paul Laszlo Industrial Designer), a book documenting his career and works. Within a decade, he completed more than thirty-five private residences. Among the most notable were the Wichita Falls Palace for oil magnate Charles McGaha, featuring a horseshoe-shaped swimming pool and Lucite furniture, and the residence of producer William Perlberg, which included a swimming pool and a private screening room. Other clients included Gloria Vanderbilt Stokowski, Barbara Hutton, Sonja Henie, and film director William Wyler. The prominence of his clientele earned him the moniker “the Rich Man’s Architect,” in a 1952 Time Magazine article.
László collaborated with artists such as textile designer Maria Kipp, ceramicist and painter Karin Van Leyden, and sculptor F. F. Kern. His exacting yet open-minded vision sometimes led him to decline commissions that did not align with his aesthetic ideals. In 1948, he joined the design team at Herman Miller, where he worked until 1952 on innovative office furniture. During the 1950s, he designed several storage furniture collections, including the “Tressage” model, as well as seating for the company Brown Saltman, a company founded by David Saltman in association with designer Paul T. Frankl (1886–1958) in 1939. Other manufacturers also commissioned his work, including Glenn of California and the Widdicomb Furniture Company, associated with major figures such as Frank Lloyd Wright, T. H. Robsjohn-Gibbings, and Mario Buatta.