Though Couch contributed to making Portland relevant, the 1905 Lewis and Clark Centennial Exposition helped turn Portland into a true metropolis, spurring a new era of economic and population growth -- the city's population tripled by the 1920s from the late 19th century. As Portland grew, urban planning commenced. Portland's leaders took inspiration from the popular City Beautiful Plan that many cities embraced during the early part of the 20th century. For Portland, that included creating a street system that followed the grid pattern, which proved significant towards the eventual construction of the Flat Iron building.
The grid (or gridiron) pattern resulted in rectangular city blocks. Thus most of the buildings conform to that shape and are either square or rectangular. However, the addition of a few streets that run diagonally resulted in a few non-rectangular shapes, including triangular corners. The FlatIron Building demonstrates that difference. The Flatiron Building is rather diminutive but no less important than other cities' flatiron buildings that exist in angular city-block locations, or the other four flatiron structures that arose in Portland.
All told, the building long served Portland as a commercial property, and then in more modern days, the home of radio stations and various service industries. But, it sits on the land that Couch settled, providing Portland with the potential to succeed as an urban community, and its shape demonstrates the urban planning associated with Portland's move towards a bonafide urban metropolis during the early part of the 20th century.