Hills residents say NSW budget overlooks 'critical' infrastructure

Residents from Sydney's Hills region say they have been let down by the New South Wales budget, claiming "critical" infrastructure needed in the area has been overlooked.

The Planning Minister announced another 4500 homes were being built at the Castle Hills Showground Station earlier this week, prompting concern from residents who say the area lacks infrastructure to support the extra population.

The increase means a total of 9500 homes will be built at the grounds, marking nearly double the agreed-upon cap set in 2017 by the council.

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"The fact that the cap has been lifted without the announcement of a school, without the funding of a school, without that critical infrastructure being delivered for our community, it shows contempt for our community here in the Hills," Hills Shire Mayor Peter Gangemi said.

An extra 90,000 people will live in the Hills Shire by 2036, according to the council.

Residents say the roads cannot cope as it is, and that schools are already at capacity.

"I have been to the Castle Hill High School. They have 51 - 51 demountable buildings. It is overcrowding, it is bursting at the seams," Councillor Mark Hodges said.

"We need new infrastructure, we need a new school for our area and without that I'm very, very upset for my community."

The Department of Planning said they are consulting with School Infrastructure NSW to ensure extra demand can be met.