Hato Hone St John were notified about 6.55am.
Three patients in a minor condition were assessed and treated at the scene.
A Fire and Emergency New Zealand spokesperson said two fire trucks from Whangārei Fire Station responded after receiving multiple calls.
The couch which was set alight sat on the corner of the homes front deck, but now just the frame remained. Photo / Brodie Stone
Crews left just after 10am and an investigator is on site today.
Pilmer said police wanted to hear from anyone who might have information to share.
Anyone in the Raumanga Valley Rd area who has CCTV or was driving between 5.30am and 6.20am with dash cam footage should get in touch.
“We will be working to establish a full picture of why this incident has occurred, and I’m asking anyone who might have seen suspicious activity before or after the fire to contact us.”
Information can be supplied to police online or by calling 105, quoting file number 250924/3224.
Information can also be provided anonymously via Crime Stoppers on 0800 555 111.
Brodie Stone covers crime and emergency for the Northern Advocate. She has spent most of her life in Whangārei and is passionate about delving into issues that matter to Northlanders and beyond.