The Central Bank is being urged slash the deposit requirements for new mortgages, as rental prices continue to rise.
The call comes from the Professional Insurance Brokers Association (PIBA).
In some cases, perspective buyers must have 20% of the house price saved, to qualify for a mortgage.
The Central Bank rule was brought in make sure borrowers can keep up their repayments.
However, PIBA says renting is now more expensive than buying, in many parts of the country.
The group claims the mortgage rules have created a "lost generation" who cannot afford to buy their own homes.