Concept plans by urban developer Evolve show a 30,000-home estate called Stoneleigh is proposed for an area between Caroline Springs and Plumpton Road.

For the past six months, Ms Dunn has been fighting proposed changes to the urban growth boundary and a tax that goes with it.

She was shocked to learn she would have an activity centre, or shops, on the doorstep of her property, which contains one of Australia's oldest bluestone woolsheds.

"It's so arrogant for someone to be able to put in a concept plan over people's homes without consulting them at all."

Ms Dunn's property was owned by one of the area's first settlers, William Cross Yuille, in the early- to mid-1800s.

"It was in a terrible state of disrepair when I got it. We've basically saved it from being demolished. I'm going to hang on to it as long as I can."

Ms Dunn said she would like the property to be included in the estate and maintained as a historic landmark, if she ever lost the fight to keep it.

"Your property is not your own. Dollars mean more than memories."

Jack Ivankovic lives on Sinclairs Road and his property is earmarked for medium-density housing.

"Everything is hush hush," Mr Ivankovic said.

"The land owners are the last ones to find out about it."