Elizabeth Hetherington sounds remarkably calm for someone who says her property has dropped an estimated $700,000 in value because of a heritage order placed on it by Ku-ring-gai Council.

“I feel like I’ve been put in prison here in my own property, and they’ve almost taken it away from me,” she said.

Elizabeth Hetherington said the value of her property had been dramatically reduced after Ku-ring-gai Council listed it as a heritage item. Credit:Louie Douvis

Ms Hetherington and her family say the heritage listing of her Pymble home is questionable and has devalued the property.

“The value of an individual property is determined by a multitude of factors and council is not in a position to comment on these,” a spokeswoman said.