Several prominent buildings in Sydney need their cladding replaced due to fire risks, documents released under freedom of information laws have revealed.

Key points: The NSW Government required buildings with cladding to be registered on its combustible cladding register in 2018

The NSW Government required buildings with cladding to be registered on its combustible cladding register in 2018 The list was released to Greens MP David Shoebridge under right to information laws

The list was released to Greens MP David Shoebridge under right to information laws The ABC's Ultimo headquarters are among those needing cladding to be partially removed

The documents reveal 11 buildings in the City of Sydney need their entire cladding replaced while a further 31 buildings — including Star Casino — require partial replacement.

In May, the ABC revealed NSW Health documents identifying hospital buildings where flammable cladding has posed major fire threats to the public in Sydney and across the state.

The City of Sydney's entries to the State Government's combustible cladding register were released to NSW Greens MP David Shoebridge under the Government Information (Public Access) Act (GIPA).

Mr Shoebridge said he was shocked the list was not publicly available.

"We have shopping centres, apartment blocks, university buildings, properties across the city that people live in, regularly visit, that are affected by flammable cladding," he said.

"At the end of last year they [the State Government] required buildings to register, they required councils to maintain lists of these properties with cladding," Mr Shoebridge said.

"What we haven't seen is a full audit of the properties, a remedial action plan, or even the publishing of the lists."

Other prominent buildings that need cladding partially removed include:

The ABC's Ultimo Centre headquarters

The ABC's Ultimo Centre headquarters Building 130 at The Australian Film, Television and Radio School's (AFTRS)

Building 130 at The Australian Film, Television and Radio School's (AFTRS) The Pullman Hotel at Hyde Park

A spokesperson said City of Sydney was investigating more than 300 properties, and 16 had been issued with fire safety orders.

One Central Park in Sydney is on the list of buildings requiring flammable cladding to be replaced. ( ABC News: Jonathan Hair )

More than 100 buildings on the register have yet to be assessed including several at the University of Sydney's main Camperdown campus.

Buildings at the University awaiting assessment include its Nanoscience Hub, Eastern Avenue Auditorium and Theatre Complex, Charles Perkins Centre, New Law Building, and Business School.

In a statement, the University said student safety was its top priority and it had been working to manage the cladding since 2017.

"The majority of our buildings have been assessed as compliant with current upgraded fire standards and considered a low-risk, however there are three buildings where the percentage of polyethylene core is unknown due to their age," a spokesperson said.

He said the university had employed a fire safety contractor to further investigate and provide additional advice on all the buildings the University had registered.

The Greens want the State Government to better resource local councils to assess at-risk properties, and to require building owners to rectify any issues.

The State Government has not yet committed to help fund rectification works to remove cladding, and Minister for Better Regulation Kevin Anderson said the cost was still uncertain.

"Councils ultimately will provide us with that information — we're continuing to work with those councils at this point in time … it's difficult to put a number on that rectification when you don't know what the detail is," he said.

The Minister also said making the register public could disadvantage property owners.

"We're mindful of the fact a cladding register per se would then put incredible pressure in relation to a disadvantage to the owners and occupiers of those buildings that have cladding," he said.

Work was underway to remove the dangerous cladding at the ABC's Ultimo building and would be completed in July next year, an ABC spokesperson said.

A spokesperson for The Star Casino said: "We are engaging proactively with the department on short and longer-term solutions."