There are two routes in which a non EEA national can apply for permission to reside in the State on the basis of Marriage to an Irish National:
1. If you are a non visa required national who has entered the State legally within the last 90 days or if you are a visa required national and you are within the period of permission to remain granted to you on arrival in the State (except short stay 'c' visas):,or
if you have current permission to remain in the State on an alternative basis both you and your Irish national spouse should attend at your local Garda National Immigration Bureau Registration Office with the following documentation:
•Your original marriage certificate
•Your original passport
•Your Irish spouse’s original passport
•Evidence of your joint address
2. If you
do not have current permission to remain in the State a written application must be made to the following address:
Spouse of Irish National Unit, Immigration Services Section,
1st Floor
Irish Naturalisation and Immigration Service.
13-14 Burgh Quay
Dublin 2.
http://www.inis.gov.ie/en/INIS/Pages/WP07000024
if you take route No. 1, you would get your stamp 4 on the basis of being a spouse of Irish national the same day.
If you take route No. 2, you would have to wait up to 12 months for your application to be processed.