New figures from the Central Statistics Office show that the proportion of homes that were bought jointly increased from 47% in 2010 to 60.3% in 2021.
The CSO noted in its latest Characteristics of Residential Property Purchasers figures that the 2021 figure was a 1.9 percentage point decrease from 2019.
The number of homes bought rose from 19,300 in 2010 to 46,420 by 2021, today's CSO figures also reveal.
In 2021, the median price of a residential dwelling was €280,000, while joint purchasers with children paid the highest median price at €322,000.
The highest median prices for sole purchasers were in Dún Laoghaire-Rathdown with prices of €480,000, followed by Dublin City at €350,000 and Fingal at €320,000.
These areas also had some of the highest median prices for joint purchasers at €640,000 in Dún Laoghaire-Rathdown, €435,000 in Wicklow and €427,000 in Dublin City.
Longford had the lowest median price for sole purchasers at €120,000 in 2021 and also for joint purchasers at €154,000.
The CSO noted in today's figures that the majority of dwelling purchasers are by people providing an address in that location.
It said that from 2010 to 2021, nearly nine in ten property buyers in Cork bought a home in Cork - the highest proportion in Ireland. It was followed closely by Dublin.
Meanwhile, just over 24% of people who bought a property in Donegal gave an address outside Ireland, the largest share in the State. Most of these addresses were in Northern Ireland, the CSO added.
Today's CSO figures also show the median age of house buyers rose from 35 to 39 years between 2010 and 2021, across all transactions.
For sole purchasers, the median age rose from 34 to 41 years from 2010 to 2021, while the median age for joint purchasers increased from 35 to 38 years.
