It continues in a southerly direction through Narrabeen and Dee Why, where it intersects with Condamine Street in North Manly and heads closer to the coast, varying between a four- and six-lane dual-carriageway until it crosses Manly Creek, where it narrows to a four-lane, single-carriageway road.

164 was declared from the intersection with Condamine Street in North Manly, via Dee Why and Narrabeen to Mona Vale (and continuing north via Barrenjoey Road to Newport),[2] and Main Road No.

The full length of the route, between Church Point and Raglan Street in Manly, was officially named Pittwater Road on 10 January 1951.

State Route 12 was realigned to follow Pittwater Road through to the intersection with Condamine Street in North Manly in 1993, but was decommissioned entirely in 1995.

[10] Pittwater Road is entirely contained within the Northern Beaches Council local government area.