On Fri, Sep 18, 2015 at 5:02 AM, Martin Koppenhoefer <dieterdre...@gmail.com > wrote: > > it depends how you use the word "Doppelhaus". Legally it means 2 touching > houses on 2 parcels. Architectonically it means 2 more or less symmetric > buildings that touch. They don't have to share the same materials or > colours (mostly they do, sometimes they don't), but rather the building > layout/facades. Completely different buildings touching at one side are > called differently (einseitig angebaut, etc.)
American terms: *duplex*: technically, one building with separate entrances. But also used far more broadly, and duplexes are a hot real estate term. *duplex apartment*: single unit spread over two floors. *triplex apartment*: single unit spread over three floors. *condo* : single building with multiple owners. Owners also belong to an association, which manages the common areas. *semidetached* or *twin*: houses that share a wall at the property line. These are often called *duplexes*. The haves of a twin look the same, unless perhaps it's also a *spite house*. *maisonette*: rough British equivalent of duplex apartment. >From the OSM point of view it may be better to break it down to atomic questions: 1. Does it straddle a parcel boundary? 2. Apartment/Deeded owners or mixed? 3. Are the architectural styles unified? building=semidetached_house is a tag I don't really know what to do with, and would thus ignore.
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