Nummert specialized in the elaboration of educational facilities. She was awarded for her works in the rural towns of Ääsmäe, Noaroots, Kolga and Uhtna for designing the schools. Her design stands out from the standardized forms and systems of other school buildings. She used glulam as a construction material for her designs. A well-known work by Nummert includes the Aruküla Primary School (Aruküla Põhikooli) in the small municipality of the same name. The architect also created a restoration design for Tallinn Service School (Tallinna Teeninduskooli) in 1946, as well as the vocational training school Tõnismäe Secondary School (Tõnismäe Reaalkooli). In the projects of renovation she was hired by school administrations because she knew how to enlarge the spaces of the buildings without demolishing the building. Narrow hallways and small rooms with small windows became bright large spaces. She designed both the façade and the interior spaces and associated equipment in her school construction projects.

The architect also designed the Salem Church in Tartu in 2000, a project that stands out among her works for its design and unique interior acoustics. It is reminiscent of the traditional Estonian architecture of sacred buildings.

Furthermore, she created designs of residential or office buildings and stores.
Nummert’s works always reflect a certain playfulness as well as closeness to nature. In 1986, she was awarded the Sirbi Architecture Prize and the Estonian SSR State Prize for her rural school buildings in Kolga and Uhtna.