Up to another £100,000 could be spent analysing Aberdeen’s car parks as part of the £27 million city centre masterplan.
The fresh bill for a “strategic parking study” was discussed by the city council’s finance committee.
Regeneration chiefs said extra work was needed to check facilities are in the right place and good enough to fit with plans for the road network.
But SNP councillors questioned why the work was not done at the same time as the highways blueprint was drawn up.
Opposition finance spokesman Graham Dickson said: “We may have fixed a roads structure that now makes the parking strategy really expensive because we may have diverted our main roads away from the main car parking we would actually want to have people going to.”
City centre manager Marc Cole insisted the Granite City revamp was an “evolving process” that did not suit a “big bang wallop” approach.
“We are on a journey. Some work was done as part of the city centre masterplan.
“But more work does need to be done to effectively look on the back of the new roads heirachy whether the existing car parking for the city centre, and car parks, are in the right place, whether those car parks are of the right quality and to what extent charging policy by public and private sector supports the aims and the objectives of the masterplan which are for more people to live, work and visit the city centre.”