[7] In 1904, the school moved to Seafield Road East in Clontarf, where the Seacourt estate now stands.

[14][15] The school originally operated from a leased coach-house and inn building near the junction of Ringsend and Irishtown named 'The Sign of the Merrion' which it leased from Richard FitzWilliam, 6th Viscount FitzWilliam via his agent Bryan Fagan of Usher's Quay and later his wife Elizabeth 'the widow' Fagan after his death in January 1761 and later again from their daughter, Barbara Verschoyle.

[16] In 1769, the governors of the school leased a plot of land on Sir John Rogerson's Quay from the estate of Luke Gardiner for a term of £70 per annum.

[17] From various sources including parliament and private donors, the governors of the school managed to raise enough funds to construct the new building between 1770 and 1773.

[citation needed] It was a functional Georgian building of 3 storeys over basement of 7 bays with matching single-storey wings and contained a rusticated raised ground floor.