Premier Mike Baird has staked the re-election of the Coalition government on a plan to use $20 billion from the partial sale of the NSW electricity network for projects that will ‘‘transform the state from one end to the other’’.

Mr Baird and Deputy Premier and Nationals leader Andrew Stoner announced cabinet approval to take a proposal for the 99-year lease of 49 per cent of the electricity network – the ‘‘poles and wires’’ – to next year’s election.

The estimated $20 billion proceeds will be used to fund a ‘‘rapid transit’’ rail extension of the north-west rail link under Sydney Harbour, through the city and on to Bankstown.

Also funded would be two extensions of the planned WestConnex motorway project – one north, towards Anzac Bridge and another south, towards Sutherland – subject to a feasibility study to be delivered by the end of the year.