A knitting club has narrowly escaped being inside a shop when a car crashed into it in the New South Wales Lake Macquarie region on Friday morning. 

The car ploughed into the back of The Moderne Haberdashery and Fashion shop at Swansea around 9:30am. 

The force of the crash left wool and craft supplies strewn across the floor.

NSW Police said a 73-year-old woman had been driving the car.

Fire and Rescue NSW Swansea commander Iain Turner said the woman accidentally pressed down on the accelerator when trying to move her husband's car.

He was not with her at the time.  

"It was quite a high performance car and she mounted the curb and ended up in The Moderne Haberdashery and Fashion shop in downtown Swansea," he said. 

Mr Turner said there was one person inside the building but no-one was injured.

He said a knitting club was luckily running late for its weekly meeting inside the shop. 

"It was just a social meeting for them every Friday, a knit and a chat," Mr Turner said. 

"Four or five of them arrived together and looked a little bit surprised that their usual spot for a knitting morning was preoccupied."

The shop is a family-owned business which has operated for more than 55 years.

"It's been there forever and a day, and there is every sort of wool and bale and little knick-knacks and trinkets that you could imagine," Mr Turner said. 

A social media post said the shop would be closed until further notice due to unforeseen circumstances. 

Firefighters helped cut the shop's power supply, assessed the structural integrity of the building, and cleared the site of debris. 

Mr Turner said the car has been removed from the shop and the owner had been notified.

"He was very good about getting a builder to assess it and they're going to board it up and do a permanent repair at some later date," he said.