A record 93,000 homes were built last year, representing a 13th year of consecutive growth.
The figures from the Department of the Environment also show the level of home-building is twice that of 1999.
A division is occurring between Dublin and the rest of the country. The capital and its surrounding counties increased their number of homes by about 8%, while the figure for the other counties is 19%.
A key problem with housing is that the biggest demand is for accommodation in the capital - where the least amount of growth is.
While house completions have reached a new record, experts say it is a peak. 8,000 fewer houses are expected to be built this year.
The Irish Home Builders' Association has welcomed the further increase in the number of house completions for 2006.
