I always thought of this house as having no particular architectural style at all, having been knocked together by a penurious homeowner in the early Depression out of whatever materials came to hand.
Apparently that applies to about a million other houses built around the same time, and behold! it has a named style after all:
Minimal Traditional is a style of architecture that emerged in mid 20th century America as a vernacular form that incorporates influences from earlier styles such as American Colonial, Colonial Revival, Spanish Revival, Tudor Revival, and American Craftsman while adhering to modern architecture‘s avoidance of ornament.
The Minimal Traditional style evolved during the 1930s and was a dominant style in domestic architecture until the Ranch-style house emerged in the early 1950s. Descending in part from the bungalows, cottages, and foursquare houses of the early 20th century, Minimal Traditional houses represent a “stripped-down version of the historic-eclectic styles popular in the 1920s”. They are usually detached single-family houses that are on the smaller side and retain simplified versions of the built-in cabinets that were popular features of the Craftsman era. Typical features include hipped or gabled roofs without much in the way of eaves; cladding in locally popular materials such as wood, brick or stone; small porches; and an asymmetrical design with the front door set off center.
The Minimal Traditional house “fulfilled aesthetic and social needs for affordable single-family housing” and was used by the Federal Housing Administration as a prototype for a “minimum house that the majority of American wage earners could afford”.
Minimal Traditional houses have been tagged with some other names: FHA house, Depression-era cottage, Victory cottage, and American small house.
— https://en.wikipedia.org/wiki/Minimal_Traditional
Other links:
Minimal Traditional Style — 1925 to 1950
Minimal Traditional Architecture
Of course, people have been poking it with a stick since at least the 1960s, and now it’s kind of a mishmash. I have some plans for bringing it back into stylistic harmony (mainly replacing the flat roof with a gable matching the existing one, and a porch across the front), but I could extend the overhangs and nail brackets on it all day long and it’d never be a bungalow.