Norman Henry Pfeiffer (November 13, 1940 – August 23, 2023) was an American architect whose career spanned over half a century.

[1] Following graduation, Pfeiffer went to work for Hugh Hardy & Associates, after searching a Manhattan phone book for an architecture firm to join.

They became known for their innovative designs for performing arts facilities and for museums, as well as for preservation, renovation and adaptive reuse projects.

In 1986, as the firm's practice was expanding nationally, Pfeiffer moved to Los Angeles to open an HHPA office in that city.

[1] Pfeiffer designed the master plan for the campus of Soka University of America in Aliso Viejo, California, which opened in 2001.