A father and son have been charged over a violent street brawl at a construction site.

Two men were taken to hospital with cuts and a broken nose and cars were damaged when up to 50 men in hi-vis gear began trading punches and kicks in Castle Hill, in northwest Sydney on Tuesday morning.

One worker was filmed being clobbered over the head a number of times with a hard hat.

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Two men, aged 43 and 55, were taken to hospital with minor injuries including a broken nose and cuts.

On Wednesday morning a father and son handed themselves in to police over the incident.

The father, 42, has since been charged with intimidation and affray while the son, 22, was charged with intimidation, affray and assault.

They were both granted conditional bail to appear before Parramatta Local Court in July.

Authorities say the fight outside Meriton’s Castle Grange construction site on Sexton Ave involved two groups, with most people involved having left before police arrived.

Police understand the father and son were subcontractors who had been laid off on Friday before returning to the worksite on Monday, allegedly sparking a fist fight.

“I think on the Monday there was probably some frustration and anger from their termination on the Friday,” Detective Superintendent Naomi Moore said.

“And whether they’ve gone there to resolve it, one would argue they haven’t as they’ve attended with hammers.

“Thankfully they put those down before they engaged in a fight with the contractors.”

Moore alleged the two men returned to the same site on Tuesday, this time with others who had not worked there previously, and “up to 50 people have engaged in a melee on the street”.

Cars were also damaged during the brawl, with one vehicle’s bonnet dented and another’s back windscreen smashed.

Police said previously said they were looking for up to 11 other people involved in the fight.

Moore said footage of the actual incident coupled with nearby CCTV means those involved will be clearly identifiable.

“We encourage those people to come forward … before we go and knock on their door because that will be happening,” she said.

Meriton said contractors involved in the fight were now out of a job.

“No direct Meriton employees were involved in the incident that took place today on the street, outside of its Castle Hill construction site,” a spokesperson said.

“The contractors involved in the fight have been immediately terminated.”

Anyone with information should contact Crime Stoppers.