The same improvements shall be installed to serve each building site of a partition as is required for a subdivision. However, if the Planning Commission finds that the nature of development in the vicinity of the partition makes installation of some improvements unreasonable, the Planning Commission shall recommend to the City Council such exception as appears necessary. The City Council shall, within 30 days after date of submission of such recommendation, approve or disapprove said recommendation. In lieu of accepting an improvement, the Planning Commission may recommend to the City Council that the improvement be installed in the area under special assessment financing or other facility extension policies of the City.