Oh definitely, my townland is at least a couple of estates, at 100+ houses each.
And then there are the creatively named estates, where the whole street name is stop words. One near me has "[number] The Avenue", "The Court", "The Close", "The Drive".
Townlands are optional, or it can be the name of a large road near you. I think there are at least 3 addresses corresponding to my house that are used by official government mail, one of the things that EirCodes were supposed to prevent.
e.g.
Ireland also makes it reasonably common that you won't have a number in the address. Is a perfectly reasonable and somewhat common address.