Living in a small, narrow space is actually surprisingly easy. There were 4 of us, and whilst it was difficult at times, most of the pressures were about not being hooked up to infrastructure like running water, sewage and electricity.
Such spaces force a sense of minimalism that I think we've lost in the modern World. The space many of us have is very luxurious in many ways.
This house looks lovely, and other narrow/slim houses linked here and from Wikipedia to my mind look great.
I wonder why this style is not more popular given the inherent advantages (i.e. running cost, less space to clean, etc.)?
The point of this is that addresses like 1/2, and even 3/4 and so on, do occur in the US, although they're uncommon compared to alphanumeric addresses. If you're in the position of dividing a housing unit it's a better idea to use a B suffix, I used to deal with a 1/2 address and it was constantly rejected by online forms that didn't allow a / in that field.
The USPS has long angled to reduce these problems by assigning a unique number to every delivery point (the ZIP + 4 + DP or '11 digit ZIP'), but this is complicated for all of the reasons you would imagine. Fundamentally the job of interpreting an address still comes down to the common sense of the letter carrier.
USPS P28 has extensive information on how USPS recommends that software handle address formats for e.g. bulk mailing, which is rather lengthy in part because of the huge variety of address variations present in the US.
Sherlock Holmes' "222B Baker Street" is a famous example.
In France if you put a building between existing addresses 11 and 13 you might do "11 bis" (or if that's taken even "11 ter"). "bis" might be translated as "again", though it's linguistically related to 2, as can be seen by "ter" which clearly looks like 3.
IIRC (it's been many years) you see this notation in the tree structure of 4G/LTE wireless deployment; the secondary (subsidiary) transmission nodes are referred to as "bis" nodes (I only vaguely remember this because an American engineer giving an otherwise excellent lecture on 4G topology mocked this French terminology).
Bizarre story: In 1984/85 I lived at 11 bis Rue XXX in Paris. Literally the week before last -- 35 years later -- I met an American woman at a dinner in Palo Alto who turns out to have lived at number 13. What a small world!
And then consider that, on top of all this, while the USPS doesn't like it, just writing the name of a major institution or company on an envelope will still often result in delivery - if it gets to the post office they'll do their best.
There may also be an addition of multiple letters. For example: in the Netherlands it is not uncommon to see a number like '45 bis' or even '45 bis B'.
'bis' is latin for 'twice', indicating that the building was split into 2 separate houses at some point in time.
Neighbors up the road have 1234A and my parents have 1234B.
Regina Pizzeria at 11½ Thacher St in Boston's North End
I imagine there are more in that neighbourhood.
I used to work on postal address recognition software and I don't recall that we had any capability for recognizing strings of digits that contained fractions.
It was a long time ago now, but it seems like something I would have remembered.
I ended up usually writing it as "200h" instead of "200 1/2".
Worked surprisingly well. One of the advantages of having deliveries still carried out by actual people where the address apparently doesn't have to be an exact match.
Sometimes they use A,B,C,D as well rather than fractions.
A house number is a type of building number.
Seems to me it's actually a pretty comfortable home if you don't have or need a lot of stuff.
What's not clear to me is if you can put in a request to not have future images blurred (or if a new owner can make this request), or if you can blur images of the property from before you bought it.
Apparently, the current owner of this house bought it in 2013, but Street View has blurred out 2 images from before that. It's possible that the previous owner wanted it blurred, too. Who knows?
http://www.vinography.com/archives/2007/06/san_francisco_win... (620 Post Street is the Fitz Hotel on the other side/above it.)
It looks like another business is/was there (Barrel Room Wine Bar) and the street number must have changed (2 instead of ½).
EDIT: * I just learned that ½ alone is, according to the USPS, an invalid street number. They still used it anyhow. https://pe.usps.com/text/pub28/28ape_004.htm
It measures 294cm towards the street - 9ft 8in. At one point there was a store selling neckties on the ground floor. :)