Since its adoption in 1995, the Mifflin County Planning and Development Department has administered the Mifflin County Subdivision and Land Development Ordinance. The ordinance applies to the municipalities in the County that do not have ordinances, which includes Bratton Township, Juniata Terrace Borough, Kistler Borough, McVeytown Borough, Newton Hamilton Borough, and Wayne Township. (Municipalities of Mifflin County that have municipal subdivision and/or land development ordinances are Armagh Township, Brown Township, Burnham Borough, Decatur Township, Derry Township, Granville Township, Lewistown Borough, Menno Township, Oliver Township, and Union Township.)
Based on changes in the Pennsylvania Municipalities Planning Code (MPC) and vague areas within the ordinance, the ordinance was amended and adopted by the Mifflin County Board of Commissioners in 2003.
The Mifflin County Planning Commission later determined that additional revisions would be appropriate to address increased development activity within the County. The Planning Commission recommended changes to provisions in the ordinance dealing with lot additions, sidewalks, non-residential lots, parking and landscaping standards, and final plan requirements. In early December 2005, a draft of the changes was provided to the municipalities under the county ordinance for review and comment. The proposed amendments, which included some revisions based on municipalities’ comments, were then provided to the County Board of Commissioners at the end of 2005. The Commissioners adopted the amendments in February 2006.