Firefighters rushed to the historic Myalla homestead after fire threatened it on Monday afternoon.
The fire which started on Sunday at about 4pm was caused by a lightning strike.
The fire took off when it was being controlled on Monday morning, spreading rapidly from the forrest and into grassland at about midday on Monday.
Fire and Rescue NSW Cooma brigade was called to protect a number of buildings on the property at about 3pm when the fire came very close to cottages and the shearing shed.
Cooma brigade captain Chris Reeks said the fire threatend farm cottages and the shearing shed.
"One cottage was directly in the line of the fire," Captain Reeks said.
"We had our fire crews and tanker supporting the RFS until about 8.30pm.".
Rural Fire Service (RFS) spokesperson Fred Nichols said the fire got away on Monday at about midday.
"Crews and a bulldozer were putting in a containment line and blacking out, but the fire spread from a rough rocky basalt hill before a containment line could be put in that area," Mr Nichols said.
"We got the dozer around the fire as much as we could, but we couldn't put in a containment line in the rocky hill area, we couldn't get down to bare earth.
"The fire made a run when heavy south-east winds sprang up at about 12."
Mr Nichols said stock losses were assessed on Tuesday, and one sheep and a calf were confirmed killed by the fire.
Welcome overnight rain fell across the fire ground on Tuesday night easing the fire threat and crews were stood down at 5.30am on Wednesday morning.
Mr Nichols said the fire has burnt about 800ha of farmland and the Myalla Station owners were watching and patrolling the fire on Wednesday which is now classed as being 'under control'.