Natalie Wood was discovered by police in July 2011 having died in early 2004. She is believed to have fallen in her bedroom and then found herself unable to get up.
Her terrace house, just metres from the city's bustling Central Station, appeared abandoned by the time she was found, with cobwebs everywhere, water damage and even a tree growing through the top windows.
Detective Senior Constable Andrew Wills told the Glebe Coroners Court there was no mattress in the house, which is estimated to be worth almost AUD 1 million (USD 890,000), no television and no fridge.
Wills said Wood, who had lived in the house since she was born in 1924, was a recluse.
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"She kept to herself," he told the inquest. "It got to a point she answered the door with a special knock."
Neighbours told police they thought she had moved away and the house was vacant.
Wood had no will and her sister-in-law Enid Davis and four distant cousins are making a claim on her estate.
A frail Davis, whose husband- Wood's brother died in 2009, told the coroner she last saw her from a bus window on January 30, 2004.
The inquest continues.