Any newly created residential lot will provide a fifty-foot landscape buffer on the side or sides facing an established commercial, industrial, institutional or essential service use where no landscape buffer has been provided between the parcels. Where the side or sides of the newly created residential lot are adjacent to property zoned commercial, industrial, institutional or essential service which has not been improved, then the proposed residential use will provide a twenty-five-foot landscape buffer along that side or sides. Upon the development of the adjoining parcel zoned commercial, industrial, institutional or essential service, that parcel will provide a twenty-five-foot landscape buffer along the common line or lines so that the total landscaped buffered area will have a minimum width of 50 feet.