She was one of the best known women architects in Romania and a significant contributor to the modernist school of Romanian architecture, until state-controlled design in the communist era curtailed individuality.
[2] In the 1926[6]–1927 term, she graduated with a diploma and later on claimed to be the fourth female architect in the country after "Ada Zăgănescu, Virginia Andreescu and Mimi Friedman".
[7] On the other hand, Delavrancea designed her first home, called the "German House", in 1921, before she finished school, while living in Nehoiu.
[3] Her many villas in the seaside town of Balcic built between 1934 and 1938 are especially notable, taking traditional forms and local motifs and reinterpreting them in functional, modern design.
Her villa for Professor Victor Vâlcovici, at 44 London Street, built in 1937–38, with its clean lines and prominent curved corner window, is one of the most often reproduced images of modernist houses in Bucharest.
[15][16] In 2011, a book entitled Henrieta Delavrancea Gibory - arhitectură 1930-1940 edited by Militza Sion featured drawings and buildings by Delavrancea-Gibory.