A mother accused of burning her son's house to the ground claims she's the victim of Hollywood special effects.

Anne Gunn, 78, has been charged with break and enter and arson after CCTV emerged of someone setting fire to Andrew Gunn's home that he had built on the back of his parents' property.

"It's not me, well it might be me super-imposed on that, but it's not me," Mrs Gunn told A Current Affair .

The vision captured by security cameras at Andrew Gunn's house in July 2016 shows a hooded intruder lighting a rag and throwing it into the property which explodes into flames.

The person responsible looks directly into the camera lens and allegedly has similar features to Andrew's mother Anne Gunn.

Andrew Gunn claims his mum Anne burned down his house. (A Current Affair)

The video emerged after Andrew claimed he sent the security hard-drive recorder to data recovery experts in the United States.

"That's my mum," Andrew told A Current Affair .

"What a mongrel, who does that to someone?"

Anne Gunn, 78, has been charged with break and enter and arson. (A Current Affair)

On the day his house burned down, Andrew Gunn was at court defending assault charges brought against him by his dad Brian. Anne Gunn was witness in the case but allegedly didn't turn up that day.

NSW Police have charged Mrs Gunn with break and enter and arson to the value of $200,000 dollars.

Anne Gunn claims the video has been tampered with to make it look like she's at the scene of the crime.

Andrew built the house on his parents' property. (A Current Affair)

"As I said to my husband, they can put Nat King Cole on movie with his daughter playing the piano and he's been dead, and she was alive," Mrs Gunn said.

"I haven't seen Nat King Cole light someone's house on fire though," her son Andrew responded.

The incident is the latest twist in a nasty family feud that dates back five years.

CCTV vision showed somebody setting fire to the place. (A Current Affair)

When Anne and Brian Gunn decided to downsize, they fell out with their son over money.

A year after the house was torched, Anne and Brian sold their house for $400,000.

After a lengthy and expensive Supreme Court case, Andrew accepted a $70,000 payment from his parents, far less than the $200,000 he said was first agreed.

Anne Gunn claims the CCTV video has been tampered with. (A Current Affair)

But now Andrew claims Anne and Brian also received a $380,000 insurance payout for his destroyed house on the back of their property.

Anne and Brian Gunn now live in a new home in Grafton, NSW, while Andrew and his partner Brenda are camping at their friend's rural property after losing most of their belongings in the fire.

Andrew Gunn says he wants his mum to face the "full force of the law". (A Current Affair)

"I want her to face the full force of the law, that's what I'd like to see, because basically she's ruined our lives," Andrew said.