Töölö was built in its present form, for the most part, in the period between 1900–1930 during an era of rapid expansion with the aim to provide appropriate accomodation to a growing bourgeoise population.
[2] Nyström's scheme represented classicism with wide main streets and imposing public buildings arranged in symmetrical axial compositions, and the other two entries following two picturesque theories of town planning proposed at that time by Viennese city planner Camillo Sitte, with the street network adapted to the rocky terrain and with picturesque compositions.
The final plan (1906) under the direction of Jung, made the scheme more uniform, while the architecture is seen as typical of the Nordic Classicism style.
A still wider (24 metres) new tree-lined boulevard was that of Helsinginkatu, driven through the working-class district of Kallio, first outlined in 1887 by Sonck, but with further input from Nyström, and completed in around 1923.
In Töölö, the marketing times for apartments are clearly shorter and the prices per square meter are therefore higher than in the rest of Helsinki on average, which speaks of abundant demand.