''ARROGANT'' is how first-home buyer Caroline Ooi described the State Government's response last week to plans for a 450-space commuter car park to be built next to hers and adjoining new houses.

The controversial development is only 60 metres from Mrs Ooi's home in Macarthur Gardens estate and about 450 metres from Macarthur station.

Home-owners feel they were ``lied to'' because they weren't told about it when they bought their dream homes in the Landcom/Stockland's estate near Macarthur Square.

About 200 residents signed a petition in an effort to have the plan overturned but Mrs Ooi said it was simply ``dismissed and laughed at in Parliament''.

Mrs Ooi, who works with people with disabilities, said the car park was not suitable for the elderly or for people in wheelchair.

``It's great that someone [Opposition transport spokeswoman Gladys Berejiklian] finally acknowledges the proposal lie as it states Macarthur commuter car park is 350 metres from the station and acknowledges that it is more in the region of 450 plus,'' she said.

``This will require someone with a disability to make their way over two road crossings with no pedestrian safety afforded.''

Labor MP John Aquilina said in Parliament that the proposed site was the most logical site for the large car park. Mr Aquilina said other potential sites within a 500-metre radius of the station were considered and discounted because they were either zoned for commercial retail uses or were affected by flooding from a local creek.

``The program is a great investment,'' he said. ``It's an investment in improving facilities for the growing number of commuters choosing to use the rail network so there will be disabled car parking next to the station in the 80 spaces to be provided and there will be a safe walking path to it, including a safe crossing of Menangle Road. The Government is proposing a major upgrade to public transport facilities at Macarthur costing more than $50 million. The upgrade includes an additional platform, a bus interchange, accessible lifts and two new commuter car parks not one.''