Hi,
Generally the sale of a commercial property is exempt from VAT.
However if the seller has opted to tax the property then they would normally have to charge VAT to the seller.
However there are scenarios where the Option to Tax has no effect and no VAT is charged and a charity buying a property is one of these scenarios.
Please see the guidance below:
Supplies not affected by an option to tax.
We would recommend referring this guidance to the seller of the property.
Thank you.