The charges include intentionally damaging by fire the property belonging to the couple who live there, having ought to know that danger to life was likely to ensure.
He is also charged with wounding with intent to cause grievous bodily harm to one of the occupants.
The man entered no plea and did not apply for bail during his appearance this morning.
Judge Gilbert granted him interim name suppression until he appears in the Timaru District Court next month.
A total of five St John units were sent to the scene including two ambulances, an operation manager, a rapid response vehicle, and one helicopter.
The house was well-lit when emergency services arrived, a Hato Hone St John spokesperson said.
Fire and Emergency said four water tankers and four fire engines were sent to the scene.
A water tanker and fire engine will remain at the scene in case of any hot spots or flare-ups.
Police said an investigation is ongoing.
Sam Sherwood is a Christchurch-based reporter who covers crime. He is a senior journalist who joined the Herald in 2022, and has worked as a journalist for 10 years.
