Two unrelated fires in the Kapiti-Mana region are being treated as arsons, and police are seeking witnesses.
The first blaze occurred at a house in Hillcrest Road in Raumati South around 10.30pm on Monday.
Initial inquiries led police to believe the fire - which caused significant damage to the property - was intentionally lit.
Nobody was at home at the time.
A 43-year-old local man was arrested on charges of burglary, male assaults female, injuring with intent and intentional damage on Monday afternoon and appeared in Porirua District Court the following day.