The head office for the AWPR in the north-east is to be sold off as the project ends.
The main site office and car park were built beside the B979 Stonehaven to Maryculter road by contractor Aberdeen Roads Ltd (ARL) in 2015 as part of the construction of the new £745 million route.
The offices – which consist of two large two-storey modular buildings – were listed for sale on auctioning website BPI Auctions.
A source close to the project told the Evening Express the offices were closed several weeks ago as staff were redeployed to other projects, with remaining workers moved into smaller satellite offices at Craibstone and Balmedie.
At its height the project employed around 2,500 workers – but this has dropped to just a few hundred.
According to the listing, the buildings were being sold off due to the end of the project with a closing date of September 21.
The project source said this is because AWPR work is understood to be complete – other than at the new River Don bridge near Dyce.
Last month transport bosses admitted “minor defects” were found on the new bridge which is part of the AWPR.
But they maintained the project remains on schedule for late autumn and said contractor Balfour Beatty would pay the extra costs.
A Transport Scotland spokesperson said: “Over the next few weeks, the temporary office accommodation at Stonehaven and Rothnick, which served as site offices for the AWPR/B-T project, will be removed.
“This will enable the contractor to undertake reinstatement works at these locations.
“Construction workers are now focused on a range of finishing works which are required to enable the contractor to open the road, which is scheduled to open by late Autumn 2018, at the earliest opportunity.
“Workers previously based at these offices have already transferred to the project’s new office at Craibstone.”