@globcoco @aral It's at least partially an overreaction to the real estate boom and bust. Things used to be way too "here, have money", and they've overcorrected.
The amount you can borrow is up to 4 times gross income for first-time-buyers and 3.5 times gross income for other buyers.
e.g, a first-time buyer couple with a combined income of €100,000 can borrow up to €400,000.
A second and subsequent buyer with the same income can borrow up €350,000.
https://www.centralbank.ie/consumer-hub/explainers/what-are-the-mortgage-measures