Deputy Steve Luce has turned down proposals to build a new Les Quennevais School on fields alongside Route de Quennevais because of concerns over the design as well as potential traffic and parking issues.
The issues were raised in an independent report compiled by planning inspector Graham Self following a public inquiry earlier this month.
In the report, Mr Self described some of the claims put forward about the benefits of the new building as 'overblown and so pretentious as to be inaccurate'.
He also said the need for a new school was 'strong, but not overriding'.
Head teacher Sarah Hague has previously said that the current building is in such a poor state of repair that staff and pupils are at risk of a 'major incident'.
Deputy Luce has accepted that the new school needs to be built on the green zone site, north of St Brelade's Social Club, and said it was now a case of those behind the project amending plans to overcome the issues.
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