Carl Harald Brummer (12 July 1864 – 14 February 1953) was a Danish architect who was influential in the design of homes at the beginning of the 20th century.

After attending the Danish Academy from 1888 to 1896, he worked for Ferdinand Meldahl and Hermann Baagøe Storck.

He initially became known for Ellestuen, a freely designed country home which was quite different from conventional houses in Denmark.

He soon became one of the leading Danish architects for designing private homes between the beginning of the 20th century and the First World War including Svanemøllevej 56 (1904) and Lundevangsvej 12 (1908), both in Copenhagen.

[1][2] In 1911, he won the Eckersberg Medal for being the architect behind Birkeborg, a country house on the Øresund coast north of Copenhagen.