The shortage of places for Sutton secondary students could be eased, if Wallington County Grammar plans to set up a free school are given the green light.
In October last year the school applied for funds to build a mixed comprehensive, which will accommodate more than 1000 students.
If the Department for Education (DfE) approves the plans, the free school will open its doors in September 2017.
Representatives of Wallington County Grammar will attend an interview with members of the department in February, after which a decision will be made.
The school say more than 800 parents of primary children across the borough signed-up to say the new school would be their first choice.
It is unclear where it would be based, but two potential sites are the old Sutton Hospital in Cotswold Road, and Rosehill Recreation Ground in Rose Hill.
Headmaster Jonathan Wilden said: "This is a great opportunity for us to share our outstanding practice, which makes us one of the leading state secondary schools in the country.
"We know that through a shared culture and ethos we can replicate an amazing school."
Rosehill Recreation Ground is a potential site for a new school
In September last year Greenshaw High School, in Grennell Road, Sutton, applied for funding from the DfE to build a free school at the Sutton Hospital site.
It is currently owned by the Epsom and St Helier NHS Trust.
Carshalton and Wallington MP Tom Brake believes two more secondary schools are needed to cope with the swelling number of students.
He said: "So far the council has kept on top of the problem. The problem at the moment being there has been a rise in demand for primary school places. The expansion of some schools has helped deal with this, but those children will get older and need to go to secondary school.
"It is very clear there is a need for two secondary schools, but they don't need to open at the same time. One can open up in the next couple of years, with another opening in the years that follow."
Wallington County Grammar School, in Croydon Road, Wallington, was supported through the application by the New Schools Network.
The charity’s director Natalie Evans said: "They have worked hard to get to the point where they have been invited to an interview at the Department for Education. We hope they will have the chance to put their plans into action.
"There are now more than 360 free schools open or approved to open, and they are proving increasingly popular with parents."
Free schools are funded by the government and not run by the local authority.
If you wish to support the application visit: www.wcgsfederation.co.uk.
Sutton Hospital could be sold to free up space for a new school
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