The long-awaited upgrade of Como train station is scheduled to be completed in 18 months.
A design and construct contract has been awarded for the work, including two lifts and new stairs, which will cost more than $20 million.
"I think the big thing is, 'Enough talk, let's just get it built'," said Transport Minister Andrew Constance, who made the announcement with Miranda MP and Parliamentary Secretary for Transport Eleni Petinos.
"There's a lot of work that has to happen, and these are complex builds.
"They are not just a case of turn up and put the lift in.
"It's got to be done safely. We are actually working in a zone that has active commuters but also a lot of dangers."
Mr Constance said the existing station access, with a steep ramp on the western side and 28 steps, was "almost a human rights barrier" for local residents with a disability.
"It's not an easy build, but it's the right build," he said.
Mr Constance said he was "pretty confident" the project would be completed by the end of 2021.
"I have seen them get on with other projects in the Transport Access Program, which has seen them delivered on time and to budget."
Mr Constance said contract sums were not disclosed, but it was in excess of $20 million.
The project will allow train travellers to take a lift from the commuter car park to an area near the bottom of the present steps and another lift to the platform.
The existing ramp from Railway Road on the western side will be replaced by steps.
Mr Constance said the removal of a large fig tree after a lightning strike had provided an opportunity to review that aspect.
"Because of the gradient, we can't leave this ramp as it is because it is not disability compliant," he said.
The project was initiated after residents raised concerns and Ms Petinos conducted a survey in 2017.
"Many mums with prams and many older people and others with disability came forward," she said.
"I was delighted to get it through as part of the 2018 budget.
"It's great to have the minister here to reinforce to the community this is actually happening."
The upgrade will include;
- Two new lifts connecting the platform and commuter car park to the underpass
- Upgraded station entry at the commuter car park, including new stairs to connect to the underpass
- Relocation of three existing accessible parking spaces closer to the new lifts
- Upgrades to existing ramp from Railway Road to meet compliant grade, and new pedestrian pathways throughout the station precinct
- Formalised kiss and ride area on Railway Road and Como Parade.
- Improved amenities such as new male and female ambulant toilets, a new family accessible toilet, CCTV and lighting.