Hampshire Police sells West Hill HQ and Alpha Park
Hampshire Constabulary has sold its headquarters and the building it bought for £9.6m to replace it in 2008 but never used.
The force said it had exchanged contracts for the sale of West Hill, in Winchester, and Alpha Park, in Chandlers Ford.
It would not confirm the sale prices, claiming the information was "commercially sensitive".
The sell-off is part of plans to make force savings of £80m, bosses said.
Alpha Park was bought in 2008 when the West Hill buildings were deemed unfit for purpose.
In January, Police and Crime Commissioner Simon Hayes confirmed the force had accepted an offer "at a loss" compared to the purchase price.
The sale is subject to planning permission.
'Efficient and effective'
He described the exchange of contracts for both sales as a "considerable step forward".
He said it would ensure facilities were "more efficient in their operation and effective in their support of operational policing, while making the savings we need to".
Chief Constable Andy Marsh said: "We are prioritising the quality of our service to the public and frontline policing over expensive bricks and mortar."
Earlier this year, the force announced it would share headquarters in Eastleigh with Hampshire Fire and Rescue Service.
It will continue to operate headquarters in Winchester, at Mottisfont Court.