Irish Census 1901 and 1911 - Addresses
The 1901 and 1911 Irish Census records are accessible on this website, free of charge.
Census of Ireland
The 1901 census was taken on 31st March 1901. The 1911 census was taken on 2nd April 1911.
Using this site and the excellent search facility, I was able to trace a great number of the officials to where they or their familes lived in both census years.
You will see the addresses in the biographies detailed as 'house number' e.g.
Residents of a house 6 in Lisheegan (The Vow, Antrim)
House numbering, in the sense that we know it as today, did not appear until later in the 20th century. In the case above, this would be the 6th house along the road from where the census enumerator started his task. If you were looking for the property today, it may not be '6 Lisheegan Road'.