It comes as a high-profile western Sydney mayor revealed he is considering running as an independent for Fairfield, which is traditionally considered very safe Labor territory.
NSW Labor leader Chris Minns told reporters on Tuesday selecting a candidate for the western Sydney seat had been challenged by a series of redistributions in the area, which saw four seats condensed into three.
"The boundaries have moved quite significantly, and we want to make sure that we've got a candidate in the field that can gather community support," Mr Minns told reporters on Tuesday.
"I'm convinced and confident we'll do that in the coming days."
The Liberal Party is also yet to finalise its candidate for Fairfield.
The NSW government is neglecting investment in western Sydney suburbs considered safe Labor territory, Fairfield Mayor Frank Carbone said on Tuesday.
"We have a two-class society, the haves and have-nots depending on if your seat is marginal," Mr Carbone told the Sydney Morning Herald on Tuesday.
"At a time when the cost of living is so high and we face inflationary pressures, our communities are missing out."
Mr Carbone said he believed the government's $5 billion WestInvest fund was being used to drive support in suburbs including Penrith, while safe Labor seats including Fairfield and Cabramatta missed out.
Mr Carbone recently brokered discussions between the federal government and communities as the brides of Islamic State fighters were repatriated into Australia, causing safety concerns.
The premier declined to answer questions on Tuesday about his younger brother's refusal to front a parliamentary inquiry, after last week telling reporters to leave his family out of his political affairs.
"That's a matter for him," the premier told reporters, when asked why Jean-Claude Perrottet would not appear at an inquiry into impropriety at the Hills Shire Council.
The inquiry was launched after Liberal MP Ray Williams used parliamentary privilege to allege several senior party members had been paid to install members on the council, to be friendly to developer Jean Nassif.
The inquiry has previously heard Jean-Claude joined with Hills Shire councillor Christian Ellis, asking businessman Frits Mare for $50,000 to stack the seat of federal Liberal MP Alex Hawke and remove him from parliament.
Another of the premier's brothers, Charles Perrottet, wrote a defiant letter to the committee on Monday, after they also requested he attend a hearing.
"I will not be participating in your Labor/Greens circus," Charles wrote in a letter seen by the Daily Telegraph.
"I reserve my position in relation to the partisan, ill-informed, speculative and defamatory commentary."
The committee had received the letter, inquiry chair and Greens MP Sue Higginson told AAP.
"(Charles) Perrottet is entitled to hold and express his opinions to the media about the parliamentary inquiry," Ms Higginson said.
"However, once again, as chair of the committee, I encourage him to attend the hearing of the committee and express his views and provide evidence to the committee on the substantive matters the committee has been asked to inquire about."
The inquiry addressed important issues in the public interest, she said.
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