Can signed lease agreement be amended or deemed invalid if it is in breach of an agreement between the landlord and the real estate agents? We have recently found out that we have to empty our shed despite stating in the agreement that part of the shed is to be off bounds to tenants. The real estate agent "forgot" to notify the tenant before the lease was signed and also "forgot" to add a clause stating this in the tenant's contract. We want the a new agreement to be signed, is it legally possible to do so under Property Law? Who do we contact to complain about the real estate agents breach of agreement ?