Another 7500 apartments would be built in St Leonards and Crows Nest on Sydney's lower north shore over the next 20 years, under long-delayed redevelopment plans being released by the Berejiklian government.

The volume of new housing to be created in the area, which intersects with NSW Premier Gladys Berejiklian's seat of Willoughby, is understood to be less than had been included in earlier drafts of the so-called Planned Precinct, which has been under development for more than two years.

NSW Premier Gladys Berejiklian and the Transport and Infrastructure Minister Andrew Constance on the job. Credit:Jessica Hromas

The Crows Nest and St Leonards scheme intends to concentrate development along the Pacific Highway and around the commercial core at St Leonards.

It also intends to retain the village atmosphere around Crows Nest, and prevent further overshadowing of Willoughby Road.