Upon crossing Lower State Road, PA 463 leaves the North Penn Valley region and fully enters Horsham Township, becoming a three-lane road with a center left-turn lane as it heads past housing subdivisions. The route loses the turning lane and continues southeast to an intersection with PA 152 in the village of Prospectville. At this intersection, PA 463 gains a center left-turn lane again and passes a few businesses before continuing between Deep Meadow Park to the north and Kohler Park to the south and crossing Park Creek. The road intersects Keith Valley Road and passes south of Samuel Carpenter Park. At the Babylon Road junction, the route becomes a five-lane road and runs to the northeast of Hatboro-Horsham Senior High School and past business parks before coming to Privet Road. At this point, PA 463 heads between the Horsham Air Guard Station to the northeast and homes and businesses to the southwest, intersecting Norristown Road. The route reaches the edge of the air station property at the Maple Avenue junction. PA 463 intersects Dresher Road, where the center left-turn lane ends and the road becomes four lanes, reaching its eastern terminus at PA 611 in the community of Horsham. At the eastern terminus, access from PA 463 to northbound PA 611 is provided by Dresher Road.