You mean the difference between the negligible amount and the fair market value? I hear of plenty of leases for $1 if the tenant brings business, or pays utilities, or brings some other value to the lessor, often in malls, and I can't imagine that department stores pay taxes based on the fair market rent. You're right, street might want to pay for a one-time consultation with a real estate attorney, but I can see that having a tenant on the land and developing it or keeping it habitable or even keeping squatters away might be considered as having value. ...