It shall be unlawful to use real property or the improvements on real property; to undertake the development of real property; to erect, construct, reconstruct, remodel, restore or improve a building or structure; to excavate land; or to alter or change the use of any real property or improvements on real property, within the unincorporated territory of Pitkin County in a way inconsistent with or not in accordance with this Land Use Code and without first obtaining all land use approvals required by this Land Use Code.