Background info:
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
https://en.wikipedia.org/wiki/House_numberingfrom a blog:
It can be inconvenient not knowing which side of the street a particular house is. It is also a convention that numbering starts from the town centre outwards or from the end of a side street adjoining the main street.
Imagine a street with 20 houses, where the houses on one side were numbered 1-10, and the houses on the other 11-20. What would you do if/when that street ever gets extended? You'd have a jump from 10 to 21 (or higher) on one side, and possibly a similar jump on the other.
Keeping houses on each side odd and even completely solves this problem.
info from the Post Office
https://postalheritage.wordpress.com/2011/08/16/house-numbering-in-the-uk/Examples of streets and numbering changes in Oxford using Directories
http://www.oxfordhistory.org.uk/streets/xtra/numbering%20system/index.html& which also contains the following text:
The Local Authority’s powers to require street numbers and road names to be displayed are contained in the Towns Improvement Clauses Act 1847 sections 64 & 65 as set out below.
Section 64 : Towns Improvement Clauses Act 1847 Houses to be numbered and streets named.
“The commissioners shall from time to time cause the houses and buildings in all or any of the streets to be marked with numbers as they think fit, and shall cause to be put up or painted on a conspicuous part of some house, building, or place, at or near each end, corner, or entrance of every such street, the name by which such street is to be known; and every person who destroys, pulls down, or defaces any such number or name, or puts up any number or name different from the number or name put up by the commissioners, shall be liable to a penalty not exceeding [level 1 on the standard scale] for every such offence”.
Section 65 : Towns Improvement Clauses Act 1847 Numbers on houses to be renewed by occupiers.
“The occupiers of houses and other buildings in the streets shall mark their houses with such numbers as the commissioners approve of, and shall renew such numbers as often as they become obliterated or defaced; and every such occupier who fails, within one week after notice for that purpose from the commissioners, to mark his house with a number approved of by the commissioners, or to renew such number when obliterated, shall be liable to a penalty not exceeding [level 1 on the standard scale], and the commissioners shall cause such numbers to be marked or to be renewed, as the case may require, and the expense thereof shall be repaid to them by such occupier, and shall be recoverable as damages.
obviously no longer enforced as when I google a location & click on Streetview many houses seem unnumbered following renovation etc
John