FINAL HOMES AVAILABLE! Twin Hills is a charming community with 60'x120' home sites that offers beautiful new homes in the City of Arlington. Located in the desirable Mansfield ISD, between Hwy 157 and Hwy 287. This community allows easy access to shopping, recreation and dining. Visit our model home next door at Calender Crossing - open 10am-7pm Monday-Saturday and 1pm-7pm on Sunday.