After the planning commission shall have adopted a major street plan of the territory within its subdivision jurisdiction, or of any part thereof, no building shall be erected on any lot within such territory or part, nor shall a building permit be issued therefor, unless the street giving access to the lot upon which it is proposed to place such building shall have been accepted or opened as is provided in section 40-48-24. Any building erected in violation of this section shall be deemed an unlawful structure, and the building inspector or other appropriate official may cause it to be vacated and to be removed.