The London Borough of Enfield's planning committee has granted permission for the scheme, which will feature football pitches and an academy building on 27ha of land at Bulls Cross.
The application will now be referred to London mayor Ken Livingstone. If he does not direct refusal it will be referred to the Government Office for London under the green belt direction.
The green belt location was one reason for the scheme's refusal by the planning committee in September last year, along with issues over traffic and character.
Savills Hepher Dixon director Peter Dixon explained: "The big difference between this scheme and the old one is that it incorporates an adjoining sports and social club. This meant that a far higher proportion of the site was already developed and used as sport pitches."
It also enabled the removal of several undistinguished buildings to benefit the landscape, he added, while traffic problems associated with the sports and social club have been resolved. "This is a high-quality scheme that will add significantly to London's sporting infrastructure," he maintained.
Planning committee chairman Martin Prescott said the significant amendments to the original proposal have satisfied members that the academy building will sit well in the landscape and not harm the appearance of the green belt.