Past County Line Road, PA 152 continues north along Limekiln Pike, leaving the North Penn Valley region and entering Warrington Township in Bucks County. The route comes to an intersection with the US 202 parkway and the US 202 Parkway Trail before it curves to the northwest. After crossing Upper State Road, PA 152 enters New Britain Township and continues north past homes. PA 152 curves northwest soon after and enters the borough of Chalfont. The route intersects US 202 Bus. and turns northeast to form a concurrency with that route on Butler Avenue, crossing the West Branch Neshaminy Creek and heading into a business district. PA 152 splits from US 202 Bus. by turning northwest onto Main Street. The road passes homes and commercial development, coming to a bridge over SEPTA's Lansdale/Doylestown Line east of the Chalfont station. PA 152 curves north before it runs along the border between New Britain Township to the west and Chalfont to the east.