A man had his trousers doused with an accelerant by three masked men who were in the hallway of the property in Carnlough.
Heating oil was dispersed around the property at Whitehilll Road and set alight and a vehicle which was parked outside was also set on fire.
Detectives are appealing for witnesses following the arson attack on Sunday night (February 7).
Detective Sergeant Crothers said around 7pm the victim, who had been retrieving items from his roofspace, noticed two masked men in the hallway of his property and another on the stairs.
One of the men then demanded money from the victim.
Heating oil was dispersed around the property and on a vehicle which was parked outside and both were set alight.
One of the suspects then threatened the victim before dousing his trousers with the accelerant.
The suspects then made off in the direction of the Whitehill Road.
One of the suspects is described as being over 6ft tall and of stocky build with green eyes.
The second suspect is described as being around 30-years-old. The third is described as around 5ft 8 inches tall and of a thin build.
“Our enquiries are ongoing and anyone who was in the area at the time and saw any suspicious activity, and in particular anyone who may have any dash-cam or other footage, is asked to contact police on 101, quoting reference number 1570 of 06/02/22,” added Detective Sergeant Crothers.
Alternatively, you can submit a report online using the non-emergency reporting form via www.psni.police.uk/
You can also contact Crimestoppers anonymously on 0800 555 111 or online at www.crimestoppers-uk.org/.