Troy Armstrong of Troy's Tree Trimming said they could prune the tree on the Canobolas Family Pet Hospital site on William and Dora streets and assess its condition.

Mr Armstrong said about six arborists and other tree workers were willing to help.

They contacted Environmentally Concerned Citizens of Orange president Neil Jones to put their offer to the building owner Dianne Gee and ask her to give the tree a 12-month reprieve before another assessment.

However, Mr Jones said after a lengthy discussion she had "declined the offer".

The Central Western Daily has unsuccessfully attempted to contact Mrs Gee and the hospital's business owner Dr Lisa Brisbane for comment.

A development application to remove the tree was supported by Orange City councillors on September 17 despite staff recommending the tree be pruned and saved.

Councillors have asked staff to bring an alternate recommendation that the tree be removed back to council within 14 days.

Mr Armstrong said they could clear branches away from the building and cut out deadwood in a few hours.

"I'm happy to prune the tree for free if it means the tree can stay. We won't only be pruning the tree, we will be assessing it," he said.

"I don't believe anyone has gone up there and done a full assessment of each branch and junction.

"I feel too many trees get removed for not the right reason. It's a very old tree. We are not allowed to remove heritage buildings for no reason and it should be the same for trees."

Last week a banner calling for the tree to be saved was attached to it. Mr Armstrong said he did not know who did it. "That wasn't me," he said.

Mr Jones said the offer was a good compromise.

"It gave the owner the opportunity to have the tree managed by a group of arborists free of charge for 12 months to address the issues of overhanging branches and any other fault identified by the owner and the owner's arborist," he said.

Mr Jones said the issue highlighted ECCO concerns that mature trees were being sacrificed in Orange.

He said while it was not the case with this tree, others were being lost to infill developments in urban areas.

"The trees are simply the victims of the overdevelopment of a backyard," he said.

Cr Stephen Nugent also backed the arborists' offer.

"We had a council staff recommendation that the tree was a healthy specimen and should be retained. I think we should be listening to the expert advice of our staff and give [the tree] 12 months," he said.

"I think it was a bit of a hasty decision to go against the staff recommendation, Cr Nugent said.

"Let's do the trimming and some lopping of the branches.

"It's such a significant tree in that area and it is really quite iconic."

The development application to council said the tree was causing cracks in the building and its roots were damaging the footpath and the ground.

Several councillors told the September 17 meeting the tree posed public liability risks and should be removed.

A consultant's report by arborist Bruce Smith director of The Tree Surgeon, which was part of the staff recommendation to save the tree, agreed there had been disturbance to the paving but he said there was no evidence of the tree roots damaging the building.

"I believe this tree to be a healthy specimen with many years of amenity ahead of it," Mr Smith said.

"The tree has reached a realistic potential in height and size.

"With proper pruning the tree could be rendered safer and its longevity thus ensured. The tree should be subject to regular monitoring especially after extreme weather events."