Costs at the Zaha Hadid transport museum in Glasgow have risen to £74m according to reports

The cost of Zaha Hadid’s Glasgow transport museum has risen by almost 50%, according to reports.

The proposed project, which will sit on the north bank of the River Clyde, will now cost £74m, compared to £50m when it was first approved.

Hadid was sent back to the drawing board by Glasgow Council last year after the budget rose to £60m.

The news of the spiralling costs came to light as the council began the process of approving contractor HBG to build the scheme.

It is understood that HBG was the only contractor to submit a costed bid to build the transport museum. Three other companies, including Balfour Beatty, pulled out of the process because of concerns over rising costs.

This lack of competition is cited as one of the reasons for the budget rise. Other reasons include inflation in the price of core materials and the detailed design of the building.

Hadid has already had to ditch a proposed aluminium-sheet cladding system and replace it with zinc to try to keep costs down.

Council officials pointed out that steel beams have risen in cost by 25% and labour costs have risen by 37%.