Any properly recorded lien or claim against property is superior in rights to those of a tenant/grantee, even though a tenant may have properly executed a bi-lateral conveying instrument with the property owner. However, occupancy and recordation may in certain instances assert a prior claim. A mortgage made after the execution of a lease for example, would therefore be subordinate to the lease. Leases are often times subordinate to subsequent mortgages up to a certain amount; this provision allows the landlord to increase an existing mortgage. A building site by contrast under which a tenant proposes to construct substantial improvements may be negotiated with an investor-landlord to subordinate the fee ownership position to the proposed mortgage.