High school students will gain exclusive access to part of Prince Alfred Park during school hours and a road in Alexandria will be closed to build a new synthetic sports field that will be shared by the local school and community, in a bid to create playground space for two of Sydney's newest multi-storey schools.

The agreement to share facilities between the NSW Department of Education and the City of Sydney is expected to be approved by the council on Monday night.

Students at the new Inner Sydney High School will get exclusive access to part of Prince Alfred Park during school hours.

Under the deal, students at the new Inner Sydney High School on Cleveland Street will have exclusive access to a designated "school play area" within the popular Prince Alfred Park between 10am and 2pm on school days.

The plan also provides for an additional "open play space allocation" in Prince Alfred Park to meet the department's minimum requirement of 10 square metres of play space per student.