Police "swarmed" the Upland Rd house around 8am on Monday, neighbours told the Herald, and were still there at 4.30pm.
Around six officers could be seen door-knocking neighbouring houses and interviewing residents while a forensics team continued to work at the address.
Forensics and police could be seen at a house on Upland Rd in Remuera on Easter Monday.
Neighbours said police presence is unusual for the area, but they were told by officers they were safe.