Cambridgeshire County Council has extended its property portfolio by buying a Tesco supermarket lease.
The £51.4m deal landed the store just outside the city centre with a 10.5 year lease that will deliver a 4.5% return.
The council hopes the cash will pay for 56 social workers or support 80 older people with dementia.
It follows the council’s £11.57m investment in an industrial unit in Peterborough.
