Hi,
If you sub let commercial property then this would normally be an exempt supply for VAT purposes.
If you want to be able to charge VAT then you would have to submit an option to tax for a specific property.
If you take out a lease on a new property and the landlord has taken out an option to tax then you would need to submit an option to tax if you want to be able to reclaim the VAT which the landlord has charged you. This would then require you to charge VAT on the rent to your tenants
Please see the guide below:
The scope of an option to tax
Thank you.