Cheap Apartments For Rent In Plainfield . Rent.com® offers 543 cheap apartments for rent in plainfield, il neighborhoods. The average apartment rent in this town costs you $2,477. Slate Run Apartments Lebanon, IN apartments for rent from www.apartmentlist.com The average apartment rent in plainfield will cost you $1,206. Start your free search for cheap apartments today. On the average rent for a 3 bedroom apartment in this city costs renters $2,845, and has a range from $1,450 to $3,059.