House numbering Guide, Meaning , Facts, Information and Description

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.

House numbering varies by place, and in many cases even within cities. In some, usually remote, areas of the world, houses are not numbered at all, instead simply being named.

Table of contents

1 Asia 2 Australia 3 Europe 4 North America

Asia

Tokyo, Japan uses a system where the city is into small sections each with its own numeric code. The houses within that zone are then labelled based on the order in which they were constructed. This system is considered by many to be very inefficient.

Australia

In Australia, most addresses following the European scheme (odd numbers on one side, even on the other). In rural areas, where houses and farms are widely spaced, a numbering system based on tenths of kilometres has been devised. Thus a farm 2.3km from the start of the road would be numbered 23, with odds and evens defined as above.

Europe

In Europe the most common house numbering 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. Where additional buildings are inserted or subdivided, these are often suffixed a, b, etc. Where buildings are later combined, they may use just one of the original numbers, or give their address as a range (e.g. 13-15). Note that in this example, this range includes numbers 13 and 15, and does not include number 14. Where some plots are not built upon, there may be considerable gaps in the numbering scheme.

A less common scheme is to number all plots on one side of a street consecutively, then all plots on the other side with consecutive higher numbers.

10 Downing Street, the official home of the British Prime Minister, is next door to 11 Downing Street, the home of the Chancellor of the Exchequer.

In Venice, Italy houses are numbered by district, resulting in just six series for the entire city; in Florence houses are given black numbers and businesses red numbers, resulting in just two series.

North America

In much of North America, buildings are not numbered according to a simple sequence but rather according to distance from a given meridian. As a result, four- and five-digit addresses are common. Odd numbers are typically on one side of the street, evens on the other.

In San Francisco, streets are numbered from where they start. As a result, sometimes parallel streets will be numbered in opposite directions. As an example, Broderick St. numbers ascend from south to north, while Masonic Ave., just three blocks away, ascends from north to south. (Navigation in San Francisco can be an enjoyable task if you like puzzle solving.)

In cities with a grid pattern of streets, addresses often increase by 100 for each cross street. Addresses may also correlate with a street-numbering system. Thus, in Cleveland, Ohio, a building with the address 900 Euclid Avenue would be at the corner of Euclid Avenue and 9th Street.

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