The amount of money being loaned to homebuyers for mortgages fell for the 14th consecutive quarter between April and the end of June, according to the Central Bank.
Loans for house prices were down 2.2% in the second quarter, following a quarterly decline of 0.7% in the first quarter.
This is despite house prices picking up across the country, particularly in the capital.
Estate agents have estimated though that anything up to two-thirds of transactions may now be cash transactions.
The outstanding amount of loans for house purchases on-balance sheet stood at €83.6bn at the end of June. A further €41bn of securitised mortgages, which continue to be serviced by resident credit institutions, was also outstanding.
Half of all outstanding loans for house purchases are on tracker mortgages.