commerical property costs

stamp duty is 2% upon purchase

vat is 13.5%

assuming the tennant is in place and pays local rates

what other expenses are incurred by the landlord

As a rule VAT on commercial property can be recovered by registered for VAT and opting to tax the lease.

If the lease is a full insuring and repairing lease then the tenant is responsible for the insurance and general repairs.

You will have legal in the acquisition and legal on the lease as well.