House numbering

A house number in Germany.

House numbering is the system of giving a unique number to each building in a street or area, with the intention of making it easier to locate a particular building. The house number is often part of a postal address. The term describes the number of any building (residential or not) with a mailbox, or even a vacant lot.

House numbering schemes vary by location, and in many cases even within cities. In some areas of the world, including many remote areas, houses are named but are not assigned numbers.

History

One of the earliest street numbering systems was introduced along Prescott Street in Goodman's Field, London. John Rocque's Map of London, 1746.

A house numbering scheme was present in Pont Notre-Dame in Paris in 1512.[1] However, the purpose of the numbering was generally to determine the distribution of property ownership in the city, rather than for the purpose of organization.

In the 18th century the first street numbering schemes were applied across Europe, to aid in administrative tasks and the provision of services such as mail delivery. The New View of London reported in 1708 that "at Prescott Street, Goodman's Fields, instead of signs, the houses are distinguished by numbers".[2] Parts of the Paris suburbs were numbered in the 1720s; the houses in the Jewish quarter in the city of Prague in the Austrian Empire were numbered in the same decade to aid the authorities in the conscription of the Jews.

Street numbering took off in the mid 18th century, especially in Prussia, where authorities were ordered to "fix numbers on the houses ... in little villages on the day before the troops march in". In the 1750s and 60s, street numbering on a large scale was applied in Madrid, London, Paris, and Vienna, as well as many other cities across Europe.[3] On 1 March 1768, King Louis XV of France decreed that all French houses outside of Paris affix house numbers, primarily for tracking troops quartered in civilian homes.[4][5]

Australia and New Zealand

A RAPID number sign
A RAPID number sign in New Zealand. The number 5 means that the property is between 40 to 60 metres (130–200 ft) from the datum point of the road, and is on the left hand side of the road as viewed from the datum point.

In Australia and New Zealand, the current standard (Australia/New Zealand joint standard AS/NZS 4819:2011 - Rural & Urban Addressing)[6] is directed at local governments that have the primary responsibility for addressing and road naming. The standard calls for lots and buildings on newly created streets to be assigned odd numbers (on the left) and even numbers (on the right) when facing in the direction of increasing numbers (the European system) reflecting already common practice. It first came into force in 2003 under AS/NZS 4819:2003 - Geographic Information – Rural & Urban Addressing.[7] Exceptions are where the road forms part of the boundary between different council areas or cities. For example, Underwood Road in Rochedale South, divided between Logan City and the City of Brisbane.

In New South Wales, the vast majority of streets were numbered before 2003, some with odd numbers assigned to houses on the right of the street when facing the direction along which numbers increase. There is no plan to reassign these numbers.

On some long urban roads (e.g. Parramatta Road in Sydney) numbers ascend until the road crosses a council or suburb boundary, then start again at 1 or 2, where a street sign gives the name of the relevant area — these streets have repeating numbers. In semi-rural and rural areas, where houses and farms are widely spaced, a numbering system based on tens of metres or (less commonly) metres has been devised. Thus a farm 2,300 metres (7,500 ft) from the start of the road, on the right-hand side would be numbered 230.[8]

Ballarat Central uses the US system of increasing house numbers by 100 after a major cross street. Streets are designated North or South depending upon their relative position to Sturt Street.

East Asia

An example of the house numbering in rural area of Taiwan.

In Japan and South Korea, a city is divided into small numbered zones. The houses within each zone are then labelled in the order in which they were constructed, or clockwise around the block. This system is comparable to the system of sestieri (sixths) used in Venice. Visitors to a large, complex city like Tokyo often must resort to asking for directions at a local police substation.

In Hong Kong, a former British colony, the British and European norm to number houses on one side of the street with odd numbers, and the other side with even numbers, is generally followed. Some roads or streets along the coastline may however have numbering only on one side, even if the opposite side is later reclaimed. These roads or streets include Ferry Street, Connaught Road West, and Gloucester Road.[9]

Most mainland Chinese cities use the European system, with odd numbers on one side of the road and even numbers on the opposite side. In high-density old Shanghai, a street number may be either a hao ("号" hào) or nong ("弄" nòng/lòng), both of them being numbered successively. A hao refers a door rather than a building, for example, if a building with the address 25 Wuming Rd is followed by another building, which has three entrances opening to the street, the latter will be numbered as three different hao, from 27 to 29 Wuming Rd.

A nong, sometimes translated as "lane", refers to a block of buildings. So if in the above example the last building is followed by an enclosed compound, it will have the address "lane 31, Wuming Rd". A nong is further subdivided in its own hao, which do not correlate with the hao of the street, so the full address of an apartment within a compound may look like "Apartment 5005, no. 7, lane 31, Wuming Rd".

Southeast Asia

The most common street address formats in Vietnam are:

  • A number followed by the street name, for example "123 đường Lê Lợi". This is the most basic, most common format.
  • A number with an alphabetic suffix: "123A đường Lê Lợi", "123B đường Lê Lợi", etc. This format occurs when a property is numbered 123 but later subdivided into two houses with different addresses.
  • If the house lies on an alley, the alley number is combined with the house number: for example, in "123/3 đường Lê Lợi", 123 is the alley's address, and 3 is the house number on that alley.
  • More complex house numbers may occur on alleys that branch from other alleys or properties on alleys are subdivided, for example "123/3E đường Lê Lợi" or "123/3/5B đường Lê Lợi". An extreme example would be "7/14/12/3/23a đường 182", which is located on 3rd alley off 12th alley off 14th alley off 7th alley off 182nd street.

Another scheme is based on residential areas called cư xá. A cư xá is addressed by house number, road, and cư xá, for example "123 đường số 4 cư xá Bình Thới". Some localities still use an older address format based on neighborhood (khu): for example, in "7A/34 Tô Hiến Thành", 7A is the neighborhood number. This confusing format is being gradually phased out in favor of the more modern formats above.

West Asia

Generally in Iran and especially in the capital Tehran odd numbers are all on one side and the even numbers opposite along streets. Infrequently, this style confuses people because this is not how it works everywhere in the city and sometimes the numbers get intertwined with each other. In the rural parts, some houses have no number at all and some have their owner's details as the number instead. In some cases, using the number 13 is skipped replacing it with equivalents such as: 12+1 or 14-1

New digital house numbering in Tehran, Iran

Northern and Western Europe

European scheme

In Europe the most common house numbering scheme, in this article referred to as the "European" scheme, is to number each plot on one side of the road with ascending odd numbers, from 1, and those on the other with ascending even numbers, from 2 (or sometimes 0). The odd numbers are usually on the left side of the road, looking in the direction in which the numbers increase.

Where additional buildings are inserted or subdivided, these are often suffixed a, b, c, etc. (in Spain and France, bis, ter, quater). Where buildings are later combined, they may use just one of the original numbers, combine them ("13/15"), or give their address as a range (e.g. "13–17"; not to be construed as including the even numbers 14 and 16). Buildings with multiple entrances may have a single number for the entire building or a separate number for each entrance.

Where plots are not built upon gaps may be left in the numbering scheme or marked on maps for the plots. If buildings are added to a stretch of old street the following may be used rather than a long series of suffixes to the existing numbers: a new name for a new estate/block along the street (e.g. 1-100 Waterloo Place/Platz, Sud St..); a new road name inserted along the course of a street either with or without mention of the parent street; unused numbers above the highest house number may be used (although rarely as this introduces confusing discontinuity), or the upper remainder of the street is renumbered.

Other local numbering schemes are also in use for administrative or historic reasons, including clockwise and anti-clockwise numbering, district-based numbering, distance-based numbering, and double numbering.

Finland

The Finnish numbering system incorporates solutions to the problems which arose with mass urbanization and increase in building density. Addresses always are formatted as street name followed by street address number. With new, infill building, new addresses are created by adding letters representing the new ground level access point within the old street address, and if there are more apartments than ground level access points, a number added for the apartment number within the new development. The original street numbering system followed the pattern of odd numbers on one side and even numbers on the other side of the street, with lower numbers towards the center of town and higher numbers further away from the center.

The infill numbering system avoids renumbering the entire street when developments are modified. For example, Mannerheimintie 5 (a large mansion house on a large city plot) was demolished and replaced with 4 new buildings each with 2 stairwells all accessible from Mannerheimintie. The 8 new access stairwells are labelled A B C D E F G and H (each with the letter visible above the stairwell). Each stairwell has 4 apartments on 5 floors, so the new development has 160 new addresses in all running from Mannerheimintie 5 A 1 through to Mannerheimintie 5 H 160. The opposite example is where old, narrow buildings have been combined; Iso Roobertinkatu 36, 38 and 40 were demolished in the 1920s and the new building has the address Iso Roobertinkatu 36-40.

In the rural parts of Finland, a variant of this method is used. As in towns, odd and even numbers are on opposite sides of the road, but many numbers are skipped. Instead, the house number indicates the distance in tens of metres from the start of the road. For example, "Pengertie 159" would be 1590 metres from the place where Pengertie starts.

Netherlands

When more buildings are constructed than numbers were originally allotted, discontinuity of numbering is avoided by giving multiple adjacent buildings the same number, with a letter suffix starting at "A". In Haarlem, Netherlands, red numbers are used for upstairs apartments.

Portugal

In Portugal, the European scheme is most commonly used. However, in Porto and several other cities in the Portuguese Northern region, as well as in the Cascais Municipality (near Lisbon), houses are numbered in the North American style, with the number assigned being proportional to the distance in meters from the baseline of the street.

Lisbon numbering is European and furthermore 'from the river, odd numbers left'. Because the Tagus borders Lisbon on the south and the east, this means that north-south streets are numbered low from the south, and east-west streets are numbered low from the east.

In many new planned neighborhoods of Portugal houses and other buildings are identified by a lote (plot) number without reference to their street. This is in law the número de polícia, which literally means police's number — the police formerly assigned the numbers rather than the town hall. The lote is the construction plot number used in the urban plan, a consecutive number series applies to a broad neighborhood. In theory and in most cases, the use of a lote number system is provisional, being replaced by a traditional street number system some time after the neighborhood is built and inhabited. In some neighborhoods, lote numbers are kept for many years, some never being replaced by street numbers.

The relatively new planned neighborhood of Parque das Nações in Lisbon has also a different numbering scheme: each building is referred by its plot, parcel, and building (in Portuguese: lote, parcela, prédio[10]).

United Kingdom

Clockwise scheme. A similar, counter-clockwise scheme also remains in use in parts of Germany.

The European system is most widely used. The odd numbers will typically be on the left-hand side as seen from the centre of the town or village, with the lowest numbers at the end of the street closest to the town centre. Intermediate properties usually have a number suffixed A, B, C, etc., much more rarely instead being given a half number, e.g. the old police station at ​20 1⁄2 Camberwell Church Street. It is extremely rare for a property (built next to no. 2 after the street had been numbered) to be zero (0) or named Minusone; researchers have found these instances once in Middlesbrough and once in Newbury.[11] In many rural streets, significantly built alongside before 1900, houses remain named (unnumbered).

In some places, particularly when open land, a river or a large church fronts one side, all plots on one side of a street are numbered consecutively. Such a street if modern and long is more likely to be numbered using odd numbers, starting at 1. Along oldest streets, numbering is usually clockwise and consecutive: for example in Pall Mall, some new towns, and in many villages in Wales. This usually also applies to all culs-de-sacs. For instance, 10 Downing Street, the official home of the Prime Minister, is next door to 11 Downing Street. Houses which surround squares are usually numbered consecutively clockwise.

In the early/mid 19th century numbering of long urban streets commonly changed (from clockwise, strict consecutive to odds (consecutive) which face evens (consecutive)). Where this took place it presents a street-long pitfall to researchers using historic street directories and other records. A very rare variation may be seen where a high street (main street) continues from a less commercial part — a road which breaks the UK conventions by not starting at 1 or 2. On one side of the main road between Stratford and Leytonstone houses up to no. 122 are "Leytonstone Road". The next house is "124 High Road, Leytonstone".

Developers may avoid the number 13 for house numbering as in Iran, because that number is considered by some to be unlucky.[12]

Blocks of flats (apartments) are treated in two ways:

  • Flats numbered individually as part of the street. A lintel will typically be embossed or metalled "1-24 Acacia Avenue" or "Flats 1-24 Acacia Avenue".
  • Flats numbered by building. The building retains its own number on the street e.g. "Flat 24, 1 Acacia Avenue" or increasingly as commonly: "Apartment 1-X, 1 Acacia Avenue" or by floor: "Apartment 9D, 1 Acacia Avenue". Outside the number of flats is discreetly shown or not revealed.

In the UK street numbering and street signposts vary across local authorities. Numbering plates (or similar) are overwhelmingly at the discretion of house owners.

Marking of numbers

In the UK fanlights in front doors were introduced in the 1720s in which the house number may be engraved.[13] Contemporary architecture and modern house building techniques see alternatively acrylic, aluminium, or glass, ceramic, brass, slate, or stone used.

Southern Europe

Italy

Italy mostly follows the European scheme described above but there are some exceptions, generally for historical reasons.

In Venice, houses are numbered within six named series (one per sestiere district). Similarly, small villages in rural areas may also occasionally use a single progressive series for all house numbers.[14]

In Genoa, Savona and Florence houses are marked with black (sometimes blue in Florence) numbers; businesses are usually (but not always) given red numbers, giving up to two distinct, numerically overlapping series per street. Those of businesses are denoted in all other writing (documents, online directories, etc.) by the addition of the letter "r" (e.g. "Via dei Servi 21r").

Turkey

In most of Turkey, currently the European house numbering scheme is applied. The Istanbul Metropolitan Municipality introduced new house numbering and street signs in 2007 by two official designers.[15]

Central and Eastern Europe

In Central and Eastern Europe, with some exceptions, houses are typically numbered in the European style. Many streets, however, use the "boustrophedon" system.

Austria

A double numbering system has been used, similar to the system in the Czech Republic and Slovakia, which also were formerly parts of the Austro-Hungarian Empire.

Czech Republic and Slovakia

Map of house numbering in the Prague district of Vyšehrad

In some Czech and Slovak cities and settlements, two numbering systems are used concurrently.

The basic house number is the "old" or "conscription number" (Czech: popisné číslo, Slovak: súpisné číslo). The conscription number is unique within the municipal part (a village, a quarter, mostly for one cadastral area) or within a whole small municipality.

For makeshift and recreational buildings in the Czech Republic, "registration number" (evidenční číslo) from a separate number series is used instead of the descriptive number. Typically, this number begins with zero or with the letter "E", or has different colour, or contains words like nouzová stavba ("makeshift structure") or chata ("weekend house"), etc.

In some settlements where streets have names (mostly in cities), "new" or "orientational numbers" (Czech: orientační číslo, Slovak: orientačné číslo) are also used concurrently. The orientational numbers are arranged sequentially within the street or square. If the building is on a corner or has two sides, it can have two or more orientation numbers, one for each of the adjacent streets or squares. Solitary houses distant from named streets often have no orientation number. In some places, the name of a small quarter is used instead of a street name. If there is a new building between two older numbered ones, the orientation number is distinguished with an additional lower case letter (for example, the sequence could be 5, 7, 9, 9a, 9b, 9c, 11, 13). In the 1930–1950s in Brno, lower case letters were used for separate entrances of modern block houses perpendicular to the street.

Either number may be used in addresses. Sometimes, businesses will use both numbers to avoid confusion, usually putting the descriptive (or registration) number first: "Hlavní 20/7". The two (or three) types of numbers are commonly distinguished by colour of the sign. Each municipality can have its own traditional or official rules and colours. In Prague and many other Bohemian cities, descriptive numbers are red, orientation numbers are blue and "evidential" numbers are green or yellow or red. In many Bohemian municipalities, descriptive numbers are blue, black, or are not unified. In Brno and some Moravian and Slovak cities, descriptive numbers are white-black signs, orientation numbers are red-white signs. Many cities and municipalities have different rules.

Formerly, Roman numerals signifying the city district were added to the conscription number: e.g. "125/III" means conscription number 125 in district number III (in Prague, this was Malá Strana). Roman numerals were used both in cities and in village municipalities with more settlements. Nowadays, the name of the settlement is preferred instead of Roman numerals.

The first conscription numbering was ordered by Maria Theresa in 1770 and implemented in 1770–1771. The series was given successively as the soldiers went through the settlement describing houses with numbers. Thereafter, every new house was allocated the next number sequentially, irrespective of its location. Most villages still use their original number series from 1770–1771. In cities, houses have been renumbered once or more often in order to be sequential – the first wave of renumbering came in 1805–1815. In 1857, the Austrian Emperor allowed a new system of numbering by streets. This new system was introduced in the biggest cities (Prague, Brno) in the 1860s. In 1884, land registration books were introduced and they used the old (conscription) numbers as a permanent and stable identifier of buildings. The new (orientation) numbers continue to be used concurrently.

Germany

In Germany, the European scheme (ascending odd/even numbers, see above) is usually used. In most cases, the numbers increase in the direction away from the town/city centre. Some places use a clockwise scheme for historical reasons, called Hufeisennummerierung ("horseshoe numbering") due to the progression of the numbers. This includes Berlin, parts of Hamburg and some other towns in northern Germany.

In some older streets in northern and eastern Germany, mainly in the former Kingdom of Prussia and adjoining areas, including parts of Berlin and Hamburg, the "horseshoe" numbering system (counter-clockwise "boustrophedon"-style numbering) was used for the numbering of new streets up until the 1920s, after which the European system was introduced for new streets.

Under the horseshoe numbering scheme, starting from one end, the buildings on the right side of the street were numbered sequentially from the near end to the far end of the street. The next number was then assigned to the last building on the left, opposite side of the street, the following numbers sequentially doubling back along the left side of the street. The building with the highest number would be the first on the left side, facing building number 1 across the street. The horseshoe numbering system remains in use in older streets in many German cities, notably Berlin, although newer adjoining streets may use modern European numbering. Kurfürstendamm in Berlin is a well-known example of a street where the horseshoe numbering scheme is still in use, although the numbering today starts with 11 at Breitscheidplatz, with number 237 across the street being the highest number.[16]

Very small villages sometimes number all buildings in the village sequentially according to their date of construction, and independent of the street they are on. However, this scheme is being phased out because it makes it hard to find a building by its address. [17]

Former Soviet Union

In Russia and many other former USSR countries, the European style is generally used, with numbers starting from the end of the street closest to the town center. Buildings or plots at street intersections may be assigned a composite number, which includes the number along the intersecting street separated by a slash (Russian: дробь), like in Нахимова, 14/41 (14 is the number along Nakhimova street and 41 is the number along intersecting street).

The odd numbers are usually on the left side of the road, looking in the direction in which the numbers increase; though in some cities (including Saint Petersburg) the odd numbers are on the right side. Some cities (for example, Nizhniy Novgorod) have mixed numbering: odd numbers on the right in some parts of the city and on the left in others.

Soviet era housing districts (microdistricts) often have a complicated network of access lanes thought too small to merit their own names. Buildings in these lanes are ascribed to larger streets which may be quite far from their location; a building placed along a street may sometimes be ascribed to another street, which sometimes makes finding a building by its address a challenging task.

In some cities, especially hosting large scientific or military research centers in Soviet time, the numbering might be different: houses may have numbers related to the block rather than the street, thus 12-й квартал, дом 3 (Block 12, House 3),[18] similar to the Japanese and Korean systems (see below). Aktau is one example of this.

When a numbered plot contains multiple buildings, they are assigned an additional component of the street address, called корпус (building), which is usually a sequentially assigned number unique within the plot (but sometimes contains letters as in 15а, 15б, 15в and so on). So, a Russian street address may look like Московское шоссе, дом 23, корпус 2 (Moscow Street, plot 23, building 2), or Льва Толстого, дом 14б (Leo Tolstoy Street, plot 14, building b).

On very long roads in suburban areas, a kilometer numbering system also may be used (like Australian rural numbering system). For example, 9-й км Воткинского шоссе (9th kilometer of Votkinsk Highway), and Шабердинский тракт, 7-й км (7th kilometer of Shaberdy Road).

Latin America

Distance scheme

In Latin America, some countries, like Mexico and Uruguay, use systems similar to those in Europe. Houses are numbered in ascending order from downtown to the border of the city. In Mexico, the cities are usually divided in Colonias, which are small or medium areas. The colonia is commonly included in the address before the postal code. Sometimes when houses merge in a street or new constructions are built after the numbering was made, the address can become ambiguous. When a number is re-used, a letter is added for the newer address. For example, if there are two 35s, one remains as "35", and the second one becomes "35A" or "35Bis".

It is sometimes common in remote towns or non-planned areas inside the cities, that the streets do not have any name and the houses do not have numbers. In these cases, the address of the houses are usually the name of a person or family, the name of the area or town, or Dirección Conocida ("known address"), which means that the house of the family is known by almost all the community. This kind of addressing is only used in remote towns or small communities near highways. For people living near highways or roads, the usual address is the kilometer distance of the road in which the house is established; if there is more than one address, some references might be written or the Dirección Conocida may be added.

In Uruguay, most house numbering starts at a high number among the hundreds or the thousands. The system is similar to the French-Spanish one: when a house is divided the term 'bis' is added with the difference that no single term designates the third: when a house is divided or added between another the term 'bis' is repeated as many divisions have been made or houses added in between, for example '3217 bis bis' corresponds to the third house from the 3217th, and so on, when many houses are merged the lowest number is used, leaving the in-between numbers missing.[19] Also there are cases when no number is assigned, this occurs mostly in peripheral areas inside the cities, low house numbering occurs in small locations and in balneary areas houses are designated by name rather than number.

In countries like Brazil and Argentina, a scheme is used also for streets in cities, where the house number is the distance measured in meters from the house to the start of the street. In Venezuela, houses, buildings, and streets have names instead of numbers.

North America

House numbers in Hamilton County, Ohio, have a clear spatial pattern; lower in Downtown Cincinnati and progressively higher further out in the suburbs

On most streets in the United States and Canada, odd numbers are on one side and even numbers on the other. Very seldom all numbers are used due to use of three alternate models:

  • Potentially hundred-long groups (blocks) of numbers that are assigned which encode the distance from a baseline (also known as base point) which is typically in the heart of a geographically large municipality such as a city. The base point is occasionally applied to a conurbation of cities.
  • Numbers that increase by 100 for each cross street. (If all blocks are the same distance apart this is identical to the model above.)
  • Numbers that equal the rounded integer distance from the base point to the closest part of the grounds of the address; or

In areas sufficiently far from the base point, four- or five-digit address numbers are common. Whether a local group of roads away from the baseline starts at 100 or any multiple of 100 depends on which precise model is chosen.

For example, along the Overseas Highway in the Florida Keys, house numbers encode the mileage to one decimal place from Mile Marker 0 in Key West. The mileage is found by dividing the house number by 1000 (for example, 77220 Overseas Highway is 77.2 miles from Mile Marker 0). Again, in rural areas, numbering is quite commonly 1000 for each mile from the nearest town center or radiating from a certain zero-point at the corner or center of a county.

In many localities, addresses increase by 100 for each cross street. The main result is building numbers toward the upper bound of each hundred are rare in cities that use consecutive numbering within this system. For example, a block has one side numbered 501, 503, 505, 507, 509, 511 followed by a block beginning with 601. Generally, within a single city there is a single base point used for all addresses and there is a near-uniform grid; numbering of all streets therefore reflects distance from that base point, and directionals (north, south, east, west) are used to refer to buildings on streets which run in that direction and are in that direction from the base point.

The numbering system thus resembles a Cartesian coordinate system. Most cities start their numbering from the base point in either single-digits or at 100. For example, if an address is located six blocks north of a city's base point (in cities with numbered streets this could be the block between 6th Street and 7th Street or similar), it would likely be numbered in either the 600 or 700 range and often the designator "north" added to the street name. The suffix is often omitted if the street does not cross beyond the base point; likewise if it has changed its name when doing so.

Some cities such as Albuquerque and Washington, D.C. have four quadrants. The quadrants are divided by roads, highways, railroads and/or other key geographic features. Block numbers increase with distance from the intersection of the two axes in the city center. The quadrants are four compass points which must be suffixed to every street name (e.g. San Mateo Blvd NE and San Mateo Blvd SW). It is common to indicate block numbers on street signs.

Often, where streets are lettered or numbered, the address numbers on perpendicular streets will use the number of the lower-numbered cross street as the "hundreds" portion of the number for each block. For example, in Washington, D.C., the block of 7th Street NW, between D and E Streets NW, is designated as the "400" block, meaning that building numbers on that block are in the range from 400 to 499 inclusive.

Some older sections of cities, such as Boston, Philadelphia, or New York, have used numbering systems that assigned consecutively, without skipping over numbers to reserve them for future use. When newer infill buildings and entrances were constructed, fractional numbers such as "​1⁄2" or "​1⁄4" were assigned (for example, the address ​10 1⁄2 Beacon Street in Boston refers to the Boston Athenæum). In older cities that grew by annexation of nearby municipalities, the street numbers may never be reassigned following a merger. For example, in the city of Boston, the same street number may be assigned multiple times as Washington Street passes through the South End, Roxbury, Forest Hills, Roslindale, and West Roxbury neighborhoods. In such cases, the neighborhood of the city must always be specified to indicate an unambiguous street address.

Apartment demarcation is usually a decision of the local authority. In most cities, numbers are assigned to each apartment per floor or by suites for office buildings or letter/number combinations, while in duplex, divided building or Polish flat settings, fractional numbers are assigned. In Milwaukee and many cities in Wisconsin, apartments are often demarcated by a letter such as A, B, C, etc. for each apartment above the main apartment on the first floor (i.e. 604D in an address would refer to the fourth apartment in that structure).

References

  1. ↑ "The Numbering of Houses" (PDF). The New York Times. Adolph Ochs. 16 July 1898. Retrieved 27 September 2015.
  2. ↑ Roy Porter (1998). London: A Social History. Harvard University Press. p. 126. ISBN 978-0-674-53839-9.
  3. ↑ "Addressing the Houses: The Introduction of House Numbering in Europe". Retrieved 2012-12-17.
  4. ↑ Rose-Redwood, Reuben S. (1 April 2008). "Indexing the great ledger of the community: urban house numbering, city directories, and the production of spatial legibility". Journal of Historical Geography. 34 (2): 286–310. doi:10.1016/j.jhg.2007.06.003.
  5. ↑ Rose-Redwood, Reuben (2009) [originally published in 2008 in Journal of Historical Geography but revised in 2009]. "Indexing the Great Ledger of the Community: Urban House Numbering, City Directories, and the Production of Spatial Legibility". In Berg, Lawrence D.; Vuolteenaho, Jani. Critical Toponymies: The Contested Politics of Place Naming. Ashgate Publishing, Ltd. p. 199. ISBN 978-0-7546-7453-5. Retrieved 26 September 2015.
  6. ↑ https://infostore.saiglobal.com/store/details.aspx?ProductID=1497944
  7. ↑ http://www.icsm.gov.au/street/
  8. ↑ "Street Addressing Working Group and the National Street Addressing Standard". Intergovernmental Committee on Survey and Mapping. March 19, 2008. Retrieved February 24, 2010.
  9. ↑
  10. ↑ https://www.publico.pt/2012/11/22/local/noticia/caiu-o-muro-que-dividia-o-parque-das-nacoes-1573465
  11. ↑ http://www.mjt.me.uk/posts/falsehoods-programmers-believe-about-addresses/
  12. ↑ Bowlby, Chris. "Would you buy a number 13 house?". BBC News. December 12, 2008. Retrieved February 24, 2010.
  13. ↑ The Fanlight Number Company, July 19, 2009. http://www.fanlightnumbers.co.uk/history.html
  14. ↑ Example of house numbers in Sistiana, Italy "Portopiccolo ha già il suo indirizzo: Sistiana 231 per le case, negozi al 232". Il Piccolo. January 20, 2014. Retrieved September 23, 2014.
  15. ↑ , Istanbul's red signs. (Turkish)
  16. ↑ Wittstock, Bernhard (2011). Ziffer Zahl Ordnung. Die Berliner Hausnummer von den Anfängen Ende des 18. Jahrhunderts bis zur Gegenwart im deutschen und europäischen Kontext. Berlin.
  17. ↑ "Drochtersen hat ein Problem: Das große Durcheinander mit den Hausnummern" (in German). Hamburger Abendblatt. Retrieved 13 January 2017.
  18. ↑ Related discussion, additional text.
  19. ↑ Caravia, Antonio (1867). Colección de leyes, decretos y resoluciones gubernativas, tratados tratados internacionales, acuerdos del Tribunal de apelaciones y disposiciones de carácter permanente de la República Oriental del Uruguay (HARVARD COLLEGE LIBRARY DEC 24 1915 LATIN AMERICAN PROFESSORSHIP FUND. ed.). Montevideo: Imp. a vapor de LA TRIBUNA. p. 278. Retrieved 30 March 2017.
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