Keystone of Galvez Subdivision Prairieville LA 70769 Home Sales Prices 2011 to 2014, Ascension Parish Louisiana near Baton Rouge. NOTE: Data use permission disclaimer is located at bottom of image and is via Greater Baton Rouge Asscociation of REALTORS / MLS from 01/01/2011 to 04/10/2014, extracted on 04/10/2014.