Clare House School opens in September – initially for nursery to year six children.
Chairwoman of trustees Harman is anticipating “a rocky time” as they set up, but is confident of a bright future.
“I think, honestly, for all independent schools, we are in a very tumultuous time,” she added.
But she believes the demand for independent education is still there.
While some independent schools face financial challenges, an investment of tens of millions of pounds by Cardiff Sixth Form College in a new campus suggests there is still significant wealth in some parts of the sector.
Renovated historic buildings and a purpose-built 17-storey student boarding centre will open in Cardiff Bay in September 2026.
Senedd members have also called on the Welsh government to take urgent action following the sudden closure of the school.
Reform MSs for Clwyd Adrian Mason, Louise Emery and Tom Montgomery have all written to the Cabinet Minister for Education and the Welsh Language, Anna Brychan.
They have raised questions over how the closure could affect other local schools in the area and are calling for urgent talks between the council and the Welsh government.
Last week, leader of the Welsh Conservatives Darren Millar said he was “saddened” to learn of the closure.
Commenting on the financial problems faced by some independent schools in Wales, the Welsh government said it would continue to monitor the situation.
“Independent schools govern and manage themselves and financial decisions must always be taken with proper regard to learners’ best interests,” a spokesperson said.
