A branch of Tesco supermarket, which built its store bigger than agreed, has had a retrospective planning application rejected.
The store was 20% bigger than planners expected
The store on Tiviot Way in Portwood, Stockport, Greater Manchester, opened for business in 2004.
But planning officers later discovered it was 20% larger than agreed.
A statement from Tesco said: "Tesco has publicly apologised and is keen to comply with all the conditions planners wish to see."
The statement added: "It hopes that this will not mean eventual closure of the store.
"Tesco created 500 jobs in the area and engaged and trained 120 people previously unemployed, therefore, sincerely hopes that its staff and regular shoppers do not suffer as a result of the decision."
The Tame Valley Area Committee refused the retrospective planning request on Monday. About 550 sq m of the store has been closed until the issue is resolved.
The original planning application was approved by Stockport Council in May 2003 for a store of just over 9,000 sq m.
But when the store was completed it had an area of more than 11,000 sq m.
The future of the store is expected to be discussed at the next full planning committee meeting on 21 September.