
Double houses are basically duplexes. Depending on the form, a duplex can have the appearance of two mirror-image halves of a building connected together, or of a single unit with fenestration symmetrically arranged to reflect the interior division. There are a few types of double houses, which for purposes of survey fieldwork are not distinguished from each other in the Utah SHPO database. However, for general knowledge they are included here.
Double House: A
This type was referred to as the “double cottage” in pre-Civil War architectural works and as the “double residence” or “pair of houses” after the Civil War. It consists of two living units under one roof. The building is similar in scale and appearance to a single-family house. The two units usually have separate entries and may be either one or two stories high.
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Double House: B
Version B of the double house is a horizontally divided building containing one flat or apartment per floor. Unlike A, type B often has a flat roof and is more urban in character. This type may have either a single common entry for both units or separate entries. Adding a mirror image of the façade of this building—in effect doubling it—creates the four-unit block, below.
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