The victim's 26-year-old partner was arrested at the scene for breaching a police safety order, which had been issued after police were called about 9am the previous day.
The man was interviewed this morning and charged with arson and breaching the safety order.
Detective Sergeant Carl Moon said the man was also facing charges relating to multiple domestic violence offences.
"The victim in this incident is still being interviewed in relation to what happened while the offender will appear in the Hamilton District Court later today,'' he said.
Mr Moon said police treated safety order breaches very seriously because the orders were a crucial tool in efforts to curb the negative impact of domestic violence.
"What we ask is that people who are in fear of violent or abusive domestic situations seek help either from police, family or a multitude of organisations dedicated to helping people in need of assistance.''