Noun
drawing office (plural drawing offices)
An office where drawings (of a technical nature) are made.
In this capacity, they manage the workflow and act as the foreman of the drawing office. Source: Internet
The visible work on-site was complemented by the enormous amount of exacting preparatory work that took place behind the scenes: the drawing office produced 1,700 general drawings and 3,629 detailed drawings of the 18,038 different parts needed. Source: Internet