Work on the £107 million mixed-use development began when Morgan Sindall moved on site back in April.

However the BBC has reported that the type of building materials to be used for the project have not yet been finalised.

Muse has now been given until September to tell the local authority what mix of concrete, glass and granite will be used.

An Aberdeen City Council spokesman said: “The initial stages of development have started on Marischal Square but work on the buildings has not yet commenced.

“Planning authorities are required to exercise the principle of ‘reasonableness’ when considering whether to use their discretionary enforcement powers.

“In this instance, it was judged that these initial works should be allowed to continue and that details of materials and finishes will be presented by the developers in due course.”

A Muse Developments spokesperson added: “As has been the case throughout the process, we are working closely with Aberdeen City Council on every aspect of the Marischal Square development.

“We are working towards a September deadline to agree the final details on some of the external materials being used on a project which remains on course for a July, 2017 completion.”

Full plans for Marischal Square include:

The project will be developed in a single phase with delivery anticipated in summer 2017.