Parliamentary Secretary for Cost of Living Catherine Cusack and Sam Farraway MLC officially opened the new Centre in Rankin Street on Wednesday.

They say it will make like easier for customers, by providing a one-stop shop for hundreds of government transactions.

"Service NSW has transformed how the customer interacts with Government, by creating a one-stop shop for registrations, licences and cost of living savings," Ms Cusack said.

"The new Centre provides access to vital services such as getting a birth certificate, Seniors Card, driver licence and renewing vehicle registration."

One of the exciting new services is the offer of Cost of Living appointments.

Ms Cusack described these as "a gateway to household savings" helping people access more than 70 cost of living programs, such as Energy Switch and Active Kids and Creative Kids vouchers.

She encouraged people to come in and make an appointment for a team member to help check their eligibility for rebates or entitlements.

"There is a good chance that the expert staff here can help save you money with the average saving per Cost of Living appointment over $550," Ms Cusack said.

Mr Farraway said the Centre would make life easier for people, save them time and money.

"Members of the community are encouraged to come for a visit, meet the Service NSW team, and learn about what this new Centre has to offer," he said.

Service NSW Centre is located at 139 Rankin Street (next to Aussie Biscuits) and is open between 9am and 4pm on weekdays.

Further information is available at www.service.nsw.gov.au

More than 270 people have entered the doors since the centre opened December 6.