At the junction with Bristol Road in the community of Hartsville, PA 263 enters Warwick Township and becomes a four-lane undivided highway as it turns north and runs through wooded areas with some homes, briefly becoming a divided highway as it passes over Creek Road and Little Neshaminy Creek on a bridge. The road again turns into a divided highway briefly as it intersects Old York Road. The route passes near residential and commercial development as it regains a center left-turn lane, reaching an intersection with Almshouse Road in the community of Jamison. After Almshouse Road, PA 263 continues north through business areas before heading past residential development, passing to the east of the Middle Bucks Institute of Technology. The route turns back into a divided highway as it crosses over the Neshaminy Creek in the community of Bridge Valley and regains a center left-turn lane as it passes through areas woodland and homes. The road leaves Warwick Township for Buckingham Township at the Sugar Bottom Road intersection.