The seemingly endless rise in Sydney's house prices is causing many people to consider a tree change to regional New South Wales.

The prospect of a cheaper house, lower cost of living, less traffic and shorter commutes is convincing city dwellers to move to cities such as Orange and Bathurst.

Campbell Hedley and his young family recently moved to Orange from Artarmon on Sydney's north shore.

"I think the tipping point for me was when we saw a place that was very basic, two-and-a-half bedrooms, that needed a bit of work, and it went for $1.4 million," Mr Hedley said.

"I was looking at a seven-figure mortgage. It was all a bit too much.

"It was an amazing jolt to the system to realise that you could buy a place out here for a third of what you were paying in Sydney for an equivalent."

Dr Clare Whelan is another tree-changer to arrive in Orange with her family.

"Any time we've saved by not commuting or not being put out in doing things that we enjoy doing, that's less time we're at work and it's more time with each other and our family," Dr Whelan said.

"Professionally, it's been great, too, because we get the full diversity of all sorts of pathology and all the comers that we might not necessarily be able to have, if we were in a busy Sydney practice."

'You can buy a row of houses in Orange'

Orange is one of seven regional cities to join a marketing campaign called Evocities, which aims to entice Sydneysiders to make a tree change.

In June 2014, Orange's median house price was $330,000.

Of the other Evocities, Bathurst, had the highest average house price with $352,528, while Tamworth had the lowest with $303,579.

Orange Mayor John Davis said the difference was stark between his city and Sydney.

"Well, you can buy a row of houses in Orange," Mayor Davis said.

He said the Evocities campaign was valuable but the State Government withdrew its funding.

"The State Government, I think, would get certainly get a huge lift in regards to their ... value for money, because when you've got regional cities going the unemployment is less," he said.

"The villages, the towns, they also benefit."