House prices in Sydney’s coastal and middle-ring suburbs have defied the lockdown, rising by up to 5 per cent over July, but some areas in the city’s south-west and Parramatta have succumbed to the ballooning outbreak.

Ten out of the 17 worst-performing suburbs were in Sydney’s south-west, CoreLogic’s latest data shows, where a hard lockdown has banned residents from leaving unless they are essential workers.