Concerns have been raised about the viability of the £152m Kings Triangle project as judgement day for the plans approaches.
A decision on whether to grant outline planning permission to developers ING Red UK (Maidenhead) will be made by Royal Borough councillors at a Maidenhead development control panel meeting on Wednesday.
Under the proposals, the area between King Street, Queen Street and Broadway could be transformed into a complex with shops, cafes, offices and open space.
The regeneration plans were initially due to be discussed by councillors on November 1 but the decision was pushed back to allow further discussion with the Royal Borough.
No recommendation has been made as officers were 'unable to recommend an unequivocal approval' and more time for the public to air their views will be allowed at the meeting.
Peter Sands, chairman of Maidenhead & District Chamber of Commerce's planning committee, said the lack of parking, links to the rests of the town and impact on independent retailers were among the items that need addressing.
He said: "We are for the principle of development but the plan that's being proposed is not right.
"There's a rush to make something happen but we don't want a white elephant, we want something that's right for the town.
"We have waited this long and we can wait a bit longer."
ING said 88 per cent of town centre businesses backed the regeneration plans, and a spokesman stressed that the Royal Borough decision was only for outline proposals rather than a full design.
He said the developers were unlikely to come back with a second set of plans if the proposals were rejected.
The meeting will be held at Maidenhead Town Hall at 7pm.
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