Gladys Berejiklian and the Coalition splashed around $28 billion in election promises to hold on to power for the next four years, with what will likely be a one-seat majority at Macquarie Street.

The Premier was re-elected despite big swings against the Nationals in the bush, and parts of Sydney's CBD still an obstacle course of light rail construction.

Ms Berejiklian assured voters that "New South Wales could have it all" — so here's a look at some of the promises she now has to deliver on:

Stadiums and transport

Sorry, this video has expired Sydney Stadium demolition goes ahead.

The demolition of the Sydney Football Stadium (SFS) will continue, with no political ramifications for the SCG Trust board — which Labor leader Michael Daley famously promised to sack.

A new 45,000-seat stadium will replace the SFS, while Stadium Australia at Olympic Park will be refurbished, after an earlier backflip on demolition there.

The Government claims the total cost of those projects will be about $2 billion.

Ms Berejiklian has promised to begin construction of the Metro West project — a new rail line from Parramatta to the CBD — in 2020, which has been costed at $18 billion.

It also plans to build a Metro from St Marys to the new Western Sydney Airport at Badgerys Creek.

The Government has also committed to start construction of the Northern Beaches Tunnel in 2020, which should cut travel time between Brookvale and the CBD by 27 minutes.

The tunnel is due to open in 2026.

The project will use driverless trains and run from Rouse Hill. ( Supplied: NSW Government )

It has also promised $14 billion in initial funding to build the Western Harbour Tunnel and Beaches Link, and $2.6 billion to fund the first stage of the F6 extension from Arncliffe to Kogarah.

A duplication of 31km of the Great Western Highway between Katoomba and Lithgow is set to be completed by 2028.

Health, education and environment

An illustration of how Sydney's Royal Prince Alfred Hospital would look after redevelopment. ( Supplied )

The Coalition promised to hire 8,300 frontline health workers over the next four years at a cost of $2.8 billion.

This will include 5,000 nurses and midwives, 100 palliative care nurses, 1,060 doctors and specialists, 880 allied health workers and 1,360 support staff.

John Hunter Hospital in Newcastle will be redeveloped and $1.3 billion will be spent relocating the Bankstown-Lidcombe Hospital.

There will be multi-million dollar upgrades of the Royal Prince Alfred Hospital, the Children's Hospital at Westmead, St George and Ryde hospitals, plus $428 million towards a children's cancer centre.

The Berejiklian Government will spending $500 million to install air conditioning in 1,000 schools over the next five years, with religious and private schools receiving $500 million worth of additional classrooms and upgraded facilities over four years.

It has also pledged $2 billion to hire an additional 4,600 teachers over the next four years.

On the environment, the Coalition has promised to help around 300,000 households by providing no-interest loans of up to $14,000 to install solar and battery systems.

The Liberals also have a target for NSW to have zero net emissions by 2050.