From 1912 to 1915 he attended the Royal Danish Academy of Fine Arts, where he studied architecture and engineering.

"[2] Some of his photos were published in Erich Mendelsohn's 1926 book Amerika: Bilderbuch eines Architekten; he did not receive credits for his works in the first edition.

[4] He, together with C. Theodore Larson, was commissioned to develop "a systematic approach to organizing the information needed by the building industry."

[2] Buckminster Fuller called Lonberg-Holm a "really great architect of the Nysky (New York skyscraper) age".

[2] In his book Scope of Total Architecture, Walter Gropius, identified Lonberg-Holn and Richard Neutra, as "men of outstanding initiative" who were "carrying on" the Modern Movement in the United States of America.