One Agency director Ash Brown, who holds the listings for the lots, said they had been on the market since December and 21 had begun the sales process.

The lots, which range from 2000-3000 square metres, were priced between $399,000 and $459,000.

"They've all gone for the selling price," Mr Brown said.

He said most of the buyers were families, predominantly from Orange.

"There were a couple from Sydney," he said.

Councillors considered the matter on Tuesday night due to the scenic sensitivity of the ridgeline.

They approved conditions requiring houses to present as single-storey to the street and the total block be half-screened by landscaping.

Councillor Stephen Nugent queried how the conditions would work in practice.

Development services director Mark Hodges said the ridgeline, unlike others previously developed in the area, had a flat saddle where the height restrictions would apply.

"As they move to the east and they drop down, they can build another level, so an undercroft, into the house," he said.

"But the overall height of the house is limited so when you're in town looking back on that ridge, you'll only see single-storey houses along the ridgeline."

Mr Hodges said similar conditions had been used for nearby subdivisions given some double-storey houses in Belair stood out.

"We're trying to get away from that," he said.

He also said there was a condition to use dark, recessive colours.

"So they don't stand out like light-reflective colours do," he said.

Councillor Russell Turner queried whether there would be upgrades to the road network to cope with the extra traffic.

"It is quite narrow," he said.

Technical services director Ian Greenham said the road would be widened along the subdivision frontage.

Mr Brown said buyers were aware of the possible conditions when they bought, wanting the extra space and expansive views.

He said the estate would be in a similar style to the nearby Sunset Estate and the first homes would start construction next year.