A Sydney man's desperate bid to save his home from compulsory acquisition for the WestConnex motorway ended in his arrest on Friday, as a squad of police officers were called in to forcibly remove him after he allegedly made prior threats to government staff.

Van Ngo, 68, was arrested for allegedly breaching the peace and escorted into a paddy wagon outside his home in St Peters in the inner west, on Friday afternoon.

It is understood Mr Ngo also had a knife in his possession, which police confiscated.

Mr Ngo was the last remaining homeowner along a strip of houses on Campbell Street that have been acquired by the state government for the $16.8 billion WestConnex motorway project.