A Paraparaumu house fire in the early hours of today is being treated as suspicious.
Fire and Emergency was notified of the fire in Kāpiti Rd at 1.11am.
Paraparaumu Fire Brigade station officer Richard Swarbrick said the back half of the building was fully involved in flames when the first appliance arrived.
The fire had been burning for a while and a whole back wall had collapsed which in turn jeopardised the roofing.
Another issue facing firefighters included parts of the flooring missing.