Contentious plans to install two temporary classrooms at Oldfield School in Maidenhead will be decided next week.
The Royal Borough council has agreed the school will take on 30 extra reception pupils every year from September.
It wants to put two modular buildings on the Chiltern Road site to house the extra pupils until long-term expansion plans are put in place.
The Maidenhead development control panel will decide whether to give approval as its meeting on Wednesday.
Neighbouring householders have voiced concerns the proposals will be an eyesore, bring gridlock to the area and a 'band aid fix'.
But council officers have recommended the application for approval saying the school has a 'robust' traffic plan which will be updated and the buildings will not significantly harm the area.
They have suggested a raft of conditions to mitigate concerns but admit the proposal 'does not constitute a form of development that the local planning authority would normally permit'.
However they say it should be granted because of the 'particular circumstances'.
The cabinet agreed in December to double Oldfield in size by 2018 to cope with a demand for places.
Plans to permanently expand the school by 2014 are being drawn up with the closure of the existing site and relocation to a field in Bray Road the preferred option.
A site in Braywick Meadows is also being considered for a new, expanded campus and the options are due to be discussed by cabinet next month.
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