You can actually argue this one. Regardless whether or not the agreement was verbal or written. You were told as part of your lease you could. Also I would argue the fact that your access to your apartment is a liability if the SUV is parked there. If something were to happen, you could sue the property owner, and the son for the vehicle hindering access to the property, that you have 'interest' in, for renting, especially for 10 years!!! They should provide adequate common area that is clear of debri, and safe for you to enter the premise with out fear of injury.