A shared building intended for college/university students (not a share room for multiple occupants as implied by the term in British English). Alternatively, use building=residential plus residential=university and loose the information that it is for students.
A residential building on a farm (farmhouse). For other buildings see below building=farm_auxiliary, building=barn, … If in your country farmhouse looks same as general residential house then you can tag as building=house as well. See also landuse=farmyard for the surrounding area
A building designed with separate rooms available for overnight accommodation. Normally used in conjunction with tourism=hotel for the hotel grounds including recreation areas and parking.
A dwelling unit inhabited by a single household (a family or small group sharing facilities such as a kitchen). Houses forming half of a semi-detached pair, or one of a row of terraced houses, should share at least two nodes with joined neighbours, thereby defining the party wall between the properties.
A general tag for a building used primarily for residential purposes. Where additional detail is available consider using 'apartments', 'terrace', 'house', 'detached' or 'semidetached_house'.
A single way used to define the outline of a linear row of residential dwellings, each of which normally has its own entrance, which form a terrace ("row-house" or "townhouse" in North American English). Consider defining each dwelling separately using 'house'.
An accommodation, often designed as a small hut, sometimes also as a room or small apartment. Built on tree posts or on a natural tree. A tree house has no contact with the ground. Access via ladders, stairs or bridgeways.
A building for non-specific commercial activities, not necessarily an office building. Consider tagging the surrounding area using landuse=commercial if there is such use. Use 'retail' if the building consists primarily of shops.
A building for industrial purposes. Use warehouse if the purpose is known to be primarily for storage/distribution. Consider using landuse=industrial for the surrounding area and appropriate tags like man_made=works to describe the industrial activity.
An office building. Use office=* where applicable for the business(es) that use the building. Consider tagging the surrounding area using landuse=commercial if it applies. Prefer landuse=retail if the building consists primarily of shops.
A building primarily used for selling goods that are sold to the public; use shop=* to identify the sort of goods sold or an appropriate amenity=* (pub, cafe, restaurant, etc.). Consider use landuse=retail for the surrounding area.
A building constructed as monastery. Often, monasteries consist of several distinct buildings with specific functions. For active monasteries (communities), use amenity=monastery, for the grounds of a former monastery, have a look at historic=monastery
A building used as a bridge (skyway). To map a gatehouse use building=gatehouse. See also bridge=yes for highway=*. Don't use this tag just for marking bridges (their outlines). For such purposes use man_made=bridge.
Clock towers are very high towers, visible from its surroundings, usually in central parts of town and squares, housing a turret clock with one or more clock faces, most often four. They are freestanding structures but can also be adjoined or located on top of another building.
A building constructed as fire station, i.e. to house fire fighting equipment and officers, regardless of current use. Add amenity=fire_station on the grounds for an active fire station.
For government buildings in general, including municipal, provincial and divisional secretaries, government agencies and departments, town halls, (regional) parliaments and court houses.
For any generic kindergarten buildings. Buildings for specific uses (sports halls etc.) should be tagged for their purpose. If there is currently a kindergarten in the building, use amenity=kindergarten on the perimeter of the kindergarten grounds.
A building errected as school. Buildings for specific uses (sports halls etc.) should be tagged for their purpose. If there is currently a school, use amenity=school on the perimeter of the school grounds.
A building related to public transport. You will probably want to tag it with proper transport related tag as well, such as public_transport=station. Note that there is a special tag for train station buildings - building=train_station.
A sports pavilion usually with changing rooms, storage areas and possibly an space for functions & events. Avoid using this term for other structures called pavilions by architects (see Pavilion)
A hut is a small and crude shelter. Note that this word has two meanings - it may be synonym of building=shed, it may be a residential building of low quality.
A carport is a covered structure used to offer limited protection to vehicles, primarily cars, from the elements. Unlike most structures a carport does not have four walls, and usually has one or two.
A garage is a building suitable for the storage of one or possibly more motor vehicle or similar. See building=garages for larger shared buildings. For an aircraft garage, see building=hangar.
A transformer tower is a characteristic tall building comprising a distribution transformer and constructed to connect directly to a medium voltage overhead power line. Quite often the power line has since been undergrounded but the building may still serve as a substation. If the building is still in use as a substation it should additionally be tagged as power=substation + substation=minor_distribution.
Frequently used for a house or other building that is abandoned and in poor repair. However, some believe this usage is incorrect, and the tag should only be used for buildings constructed as fake ruins (for example sham ruins in an English landscape garden). See also lifecycle tagging.