In the US most commercial leases I've seen or had were for 5 years. Some less. And with the 5 year leases there is usually a clause the holds the lessee responsible for any increases in taxes on the property, so the owner is covered.
Another point with leases is subrogating fire insurance. In some cases the tenant can be relieved of some of the cost if the landlord will stipulate that he also carries coverage and the is no need to duplicate.
As suggested, consult an attorney. Never use advice on a forum in legal matters.
Not even mine.
