Duplex (building)

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For other uses, see Duplex.
An over-and-under duplex house in Southeastern Pennsylvania.
A side by side duplex also known as a semi-detached house.

In North America, a duplex house is a dwelling having apartments with separate entrances for two households. This includes two-story houses having a complete apartment on each floor and also side-by-side apartments on a single lot that share a common wall.[1] By contrast, a building comprising two attached units on two distinct properties is typically considered semi-detached or twin homes but may also be referred to as a duplex.

The term "duplex" can't be extended to three-unit and four-unit buildings, as they would be referred to with specific terms such as triplex and fourplex or quadplex/quadruplex.[2] Because of the flexibility of the term, the line between an apartment building and a duplex is somewhat blurred, with apartment buildings tending to be bigger, while duplexes are usually the size of a normal house.

Variants

Big cities

In dense areas like Manhattan and downtown Chicago, a duplex or duplex apartment refers to a maisonette, a single dwelling unit spread over two floors connected by an indoor staircase.[3] Similarly, a triplex apartment refers to an apartment spread out over three floors. These properties can be quite expensive and include the most expensive property in Manhattan as of 2006 (according to Forbes Magazine), a triplex atop The Pierre Hotel.[4] In this context, an apartment locating on one floor only may be called a simplex.

UK

In the United Kingdom, the definition of a duplex is only that of a flat or apartment on two floors connected by an inner staircase though, because many new apartments have open-plan designs, the distinction between a duplex and an apartment with a mezzanine is blurred. This traditional layout is normally called a maisonette, especially if the building is older, but the term "duplex" is increasingly used by estate agents because of the perceived glamour of the term.

Urban planning

In urban planning, the term duplex is used more specifically. Major Canadian cities sometimes use the term duplex to refer specifically to a building with one unit built above another. Edmonton defines 'Duplex Housing' as "development consisting of a building containing only two Dwellings, with one Dwelling placed over the other in whole or in part with individual and separate access to each Dwelling".[5] Calgary defines Duplex Dwelling as "a building which contains two Dwelling Units, one located above the other, with each having a separate entrance".[6] Toronto proposes in their new Zoning Bylaw to define 'Duplex Building' as a building that has only two dwelling units, and one dwelling unit is entirely or partially on top of the other dwelling unit.[7] Halifax defines Duplex Dwelling as "the whole of a dwelling that is divided horizontally into two separate dwelling units, each of which has an independent entrance".[8]

Other major cities use the term duplex, but for dwelling units. Dallas defines the term duplex as "two dwelling units located on a lot".[9] Philadelphia defines a duplex dwelling as "a dwelling occupied as the home or residence of two (2) families, under one (1) roof, each family occupying a single unit".[10]

Other major cities do not use the term duplex in their zoning or land-use bylaws. San Francisco and Vancouver use the term Two-family dwelling.[11][12] Winnipeg uses the term Dwelling, two-family.[13] The definitions of these terms do not specify the physical relationship between the two dwelling units in the building. In cities such as Buffalo, Detroit and Chicago the term Two-flat is used and defines it as a "residential building that contains 2 dwelling units located on a single lot. The dwelling units must share a common wall or common floor/ceiling."[14]

Where cities do not define the relationship of the dwelling units to one another, units may be built one on top of the other, or one beside the other. The latter arrangement is more specifically referred to as a semi-detached building.

See also

References

  1. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  2. ↑ Merriam Webster Online: definition of fourplex
  3. ↑ [1]
  4. ↑ Most Expensive Homes In The U.S. 2006. Forbes.com (23 June 2006). Retrieved on 2011-06-07.
  5. ↑ Edmonton Zoning Bylaw
  6. ↑ Calgary Land Use Bylaw
  7. ↑ Proposed Toronto Zoning Bylaw
  8. ↑ Halifax Mainland Land Use Bylaw
  9. ↑ Dallas Zoning Code
  10. ↑ Philadelphia Code
  11. ↑ Vancouver Zoning and Development Bylaw
  12. ↑ San Francisco Planning Code
  13. ↑ Winnipeg Zoning Bylaw
  14. ↑ Chicago Zoning Ordinance
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