Single-pen architecture and double-pen architecture are
architectural style
An architectural style is a set of characteristics and features that make a building or other structure notable or historically identifiable. It is a sub-class of style in the visual arts generally, and most styles in architecture relate closely ...
s for design of log, and sometimes stone or brick pioneer houses found in the United States. A single pen is just one unit: a rectangle of four walls of a log cabin. In double pen architecture, two log pens are built and those are joined by a roof over a breezeway in between.
A saddlebag house is a subset of double-pen architecture with two rooms, a central chimney, and one or two front doors
See also
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Dog trot architecture
The dogtrot, also known as a breezeway house, dog-run, or possum-trot, is a style of house that was common throughout the Southeastern United States during the 19th and early 20th centuries. Some theories place its origins in the southern Appalac ...
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Central-passage house
The central-passage house, also known variously as central hall plan house, center-hall house, hall-passage-parlor house, Williamsburg cottage, and Tidewater-type cottage, was a vernacular, or folk form, house type from the colonial period onward ...
References
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Architectural styles
Log buildings and structures in the United States