A new contractor is due to start work on an all-weather sports pitch and car parking at a special next week.
The previous firm went bust, adding to the saga of problems and delays linked to Woodlands Meed College, in Burgess Hill.
A rebuild was completed in the summer, a year later than planned, and after more than 1,000 snagging issues were identified.
West Sussex County Council said today (Friday 6 December): “A new contractor has been appointed by West Sussex County Council to complete enabling works at Woodlands Meed College, to prepare for construction of a new all-weather pitch and additional car parking.
“Sunninghill Construction has been appointed by the council after previous contractor ISG entered administration earlier this year.
“Sunninghill will recommence ground clearance works on Monday (9 December). These are required before the main phase two construction works can begin.
“The appointment of a contractor to complete the remaining phase two works is expected to be made by West Sussex County Council in early 2025.
“Staff and pupils at Woodlands Meed College have already moved into the new main building after it was handed over to the school by the council earlier this summer.
“The multimillion-pound development in Burgess Hill provides new facilities including a hydrotherapy pool, 12 new classrooms and a two-court sports hall for 100 children with special educational needs and disabilities.
“These are in addition to the all-weather pitch and outside multi-use games area and amphitheatre where children can sit together and hold sporting and social events.
“The council remains committed to ensuring the works are completed as soon as possible and to the highest standard that we, the staff, pupils and parents expect.”
Previously the council said: “West Sussex County Council has allocated £21.6million to a major project to rebuild Woodlands Meed College.
“The new facilities will significantly improve facilities for pupils who have special educational needs and disabilities (SEND) at the Burgess Hill college.
“Independent surveys carried out last year showed that the current buildings are safe but the facilities need to be upgraded and more space is required for the college’s 100 pupils.”