Skip Navigation
StreetEasy Logo

Apartment numbering: how does it work?

Started by Triple_Zero
over 13 years ago
Posts: 516
Member since: Apr 2012
Discussion about
Lighthearted question this time: what's the deal with apartment numbering? From what I've seen, the vast majority use the "regular" scheme of having a number that indicates the floor, and then a letter for each apartment on the floor. 1A, 1B, 1C... on the first floor, 2A, 2B... on the second, etc. Or they might have a digit for the floor and then two more digits for the apartment: 101, 102...,... [more]
Response by yikes
over 13 years ago
Posts: 1016
Member since: Mar 2012

floor numbering can be amusing, too--some new bldgs number the basement as 1, the lobby as 2 and 3 (based on the double height ceiling) so that the residential floors start on 4!! makes the 2nd floor so much more appealing!!

Ignored comment. Unhide
Response by Triple_Zero
over 13 years ago
Posts: 516
Member since: Apr 2012

Are they allowed to do that? I once checked out an apartment building in Tokyo which was built into the side of a hill, with the entrance on the high side. This meant that the rooms in the "basement" were really ground-floor-like, but regulations on numbering meant that those had to be "basement" rooms. The agent was saying that just seeing the number "002" was enough to put people off, despite it getting as much light as a ground-floor room, and that rooms above that, in the 100s, looked like ground floor rooms so people would shy away from them. I'd pick that 002 just for the novelty!

Ignored comment. Unhide
Response by NWT
over 13 years ago
Posts: 6643
Member since: Sep 2008

http://streeteasy.com/nyc/building/1025-5-avenue-new_york is another two-building co-op that uses number-letter-building notation. It was usually done where the two buildings together had more apartments per floor than there are letters, so A-to-something in one building and something-to-Z in the other building wouldn't work.

Ignored comment. Unhide
Response by truthskr10
over 13 years ago
Posts: 4088
Member since: Jul 2009

I like the ones that use N/S. Saves the trouble on googling the street address and figuring out north and south apartments.

Ignored comment. Unhide
Response by flarf
over 13 years ago
Posts: 515
Member since: Jan 2011

I think using the Fibonacci sequence would be a great idea, assuming you can figure out how to have two apartments that are both numbered 1. Probably best for a smaller building though...

Ignored comment. Unhide
Response by ph41
over 13 years ago
Posts: 3390
Member since: Feb 2008

2 Tudor City place does it, and I think Southgate also does it.

Ignored comment. Unhide
Response by jordyn
over 13 years ago
Posts: 820
Member since: Dec 2007

They use the Fibonacci sequence?

Ignored comment. Unhide
Response by Triple_Zero
over 13 years ago
Posts: 516
Member since: Apr 2012

"I like the ones that use N/S. Saves the trouble on googling the street address and figuring out north and south apartments."

That is an advantage; this place has east/west:

http://streeteasy.com/nyc/building/644-broadway-new_york

I've seen F/R (front/rear) also, like this one:

http://streeteasy.com/nyc/building/strivers-row#building_activity_units

And "The Edge" in Brooklyn seems to have so many units on some floors that they ran out of letters, but didn't want to assign "#427"-type numbers, so they went with double letters like #4DD and #3AA:

http://streeteasy.com/nyc/building/the-edge-north#building_activity_units

This building isn't without its share of other weirdness; what are "TH1N" and "PG2GN"?

Ignored comment. Unhide
Response by truthskr10
over 13 years ago
Posts: 4088
Member since: Jul 2009

>This building isn't without its share of other weirdness; what are "TH1N" and "PG2GN"?

Best guesses
TH1N Townhouse One North
PG2GN Parlour floor and ground floor duplex North

Ignored comment. Unhide
Response by lad
over 13 years ago
Posts: 707
Member since: Apr 2009

For walk-up buildings, the standard seems to be F/R for buildings for two units per floor, and FE/FW RE/RW for buildings with four units per floor. Basement is usually B (occasionally G), and on rare occasions I've seen Cellar with C. (There is one cellar apartment I saw where you had to walk up one flight of stairs outside to a vestibule and then go down TWO flights of interal stairs to the cellar/sub-basement level, which opened into a below-grade yard. Have no idea how this was ever legal.)

Is any of this a city and/or postal service convention, I wonder? My building and a few others I've seen have or had numbers from 1-10 on the doors, but the postal address is F & R.

As an aside, basement-level unit owners and/or their real estate agents tend to get creative and "rebrand" their apartments as GARDEN / GRDN, etc. Makes for some trickiness on StreetEasy, attempting to match listing to sales.

Ignored comment. Unhide
Response by Triple_Zero
over 13 years ago
Posts: 516
Member since: Apr 2012

Lad, that "GARDEN" is pretty sneaky; I'd assumed that GRN meant "ground", or first floor!

I learned from that building I mentioned above that in Tokyo, the grade level is based on where the main entrance is, so the floors are defined with that point being the ground floor. Developers will also fiddle with the position of the door so as to avoid the hated-in-Asia number 4; synonymous with "death". In new developments the house number changes every 10 meters, and it's based on where the door is, so sometimes you'll see a door in an odd spot just so that the house number can be, say, 18-3 or 18-5 and not 18-4.

I don't think the postal service can go around dictating to building developers (and certainly not co-op boards) how to number their apartments. It would be pretty scary if they could.

Ignored comment. Unhide

Add Your Comment