Mr Norris said firefighters were called to a house on Avonside Drive at 8.15pm yesterday and on Aldershot St in Aranui at 5.30am today.
The previous fires at the properties had been some time ago, he said.
"So it's not like they are re-ignitions or anything like that - they've both been torched again."
Fire investigators would investigate all three fires today.
Investigators would also try to establish the cause of house fire in Ohau, south of Levin.
Fire Service central communications shift manager Murray Dunbar said the fire at a property on State Highway 1 was reported shortly before midnight.
Firefighters from Levin and Otaki extinguished the blaze.
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