The facility originally supposed to cost in the region of 450 million euro.
The cost of the New Children's Hospital is now estimated to be 2.24 billion euro.
The previously approved budget was 1.73 billion euro.
Health Minister Stephen Donnelly gave an update to Cabinet this morning.
Ministers approved an additional half a billion euro to the cost of the National Children's Hospital.
The main new hospital building will deliver 300 individual inpatient beds, 60 critical care beds, 20 Child and Adolescent Mental Health Services beds, and 93 day-beds.
The facility originally supposed to cost in the region of 980 million euro.
There have been multiple cost overruns since construction began, and it's set to be the most expensive hospital in the world.

Kildare North TD Joe Neville Appointed As Fine Gael Spokesperson On Infrastructure And Delivery
Secondary School Exam Fees Set To Be Reinstated In 2026
Kildare Cancer Survivor Welcomes ‘Right to be Forgotten’ Breakthrough
€2 Million Transport Fund Announced to Support Learners with Disabilities
Fears Surround Potential Job Losses At Claire's Newbridge Store
Previously Paused Social Housing Project In Athy Gets Go-Ahead
Spike in Helpline Calls After Controversial Parade Float
Warmest Day Of The Year So Far As Temperatures Climb