Police later confirmed someone had reported hearing gunshots on Bleakhouse Rd in Mellons Bay, north of Howick, just before 9pm.
Initial assessment of the scene indicated a shot or shots had been fired. Officers had attended and remained in the area.
A witness told the Herald at least four bullet holes could be seen through one window of the house.
Detective Inspector Warrick Adkin, of Counties Manukau Police, said this morning that they had reports that a firearm had been discharged in the direction of a residential property.
"Inquiries are ongoing to establish the circumstances of what has occurred, including a review of available CCTV footage," he said.
It was not immediately clear whether the incident was related to the recent spate of shootings linked to tensions between the Killer Beez and Tribesmen gangs.
Across Tuesday night and Wednesday morning, seven shootings occurred across the city - four in the space of an hour.
Four took place in South Auckland, while three were in West Auckland.
Five of the properties targeted in shootings overnight have in the past had links to gangs, but two of the addresses had no links currently to gangs.
Police superintendent Jill Rogers confirmed there had been 12 firearms offences across the city since Sunday.
No arrests have been made after seven shootings beginning on Tuesday evening. Rogers also confirmed that a district-wide order was made last night for all officers in Auckland to be armed. The order has since ended.
Rogers believed that a number of the weapons used were high-powered rifles, which carry an "enormous" risk to the community.
"These are family homes with children."
Auckland investigators were working with officers in Northland to determine if there were links between incidents in the two areas.