Suffolk County Council confirmed it had submitted a bid to the Department for Education last month under the latest wave of free special school applications.
It aims to develop a specialist autism facility, which will cater for 60 pupils from school years 3-11.
It is understood the county will find out early next year if its bid was successful.
A county council spokeswoman said: “The bid was submitted in line with the free school wave submission process and was submitted on the 15 October 2018.
“The free school process does not detail a response date for success other than early 2019.
“The decision was taken to request an ASC [autism spectrum condition] special school based on the growth data illustrated within the special education needs [SEN] sufficiency plan, the impact will be that young people with ASC will be able to access provision close to their home, access specialist support to help them fulfil their education potential and to extend the LA’s local offer.”