Hi Anna,
If you rent out a commercial property then it would be exempt from VAT.
If you place an Option to tax on a commercial property, however you will then be required to charge VAT on the rent.
If you put an option to tax in place you can look at recovering VAT on the expenses incurred in relation to the property.
Please see the guidance below:
9.1 Rules on reclaiming input tax
2. The scope of an option to tax
Thank you.