Melbourne, Feb 08 : Actress Nicole Kidman is considering turning her hideaway in a New South Wales (NSW) village into a horse riding refuge for her sister Antonia and her four kids.

Lavish renovations to the 6.5 million dollars homestead in the Southern Highlands region are revealed in council documents which show plans for a pool, tennis court, sandstone gym and entertainment centre.

However, insiders say the heart of the 45ha colonial estate, known as Bunya Hill, will be the stables.

"The stables are for Antonia. She''s the one who''s really into horses. Nicole is absolutely in love with the place; she thinks it''s fabulous," the Daily Telegraph quoted a source close to the family, as saying.

"But since she and Keith (her husband Keith Urban) are here only twice a year, this home is not just for her - it''s for her extended family,'''' the source added.

A 2.5m high, 250m earth wall dubbed ''The Great Wall'' by locals, is being built along the perimeter of the property, making it impossible to view from the road.

Plans show the proposed sandstone brick gym will look like ''a traditional Victorian-era outbuilding''.

An 18m in ground swimming pool is to be constructed in front of the gym

and the largest of the dams will feature a 3m jetty made from treated pine.

The entry will be framed by antique posts topped with stone plinths and look out onto a full-size tennis court. (ANI)