A legal battle is being fought to save the Victorian house where Sir Arthur Conan Doyle wrote The Hound Of The Baskervilles.
A High Court judge was told on Wednesday that Undershaw, located in a four-acre site at the Hindhead Crossroads near Haslemere, Surrey, is facing demolition and conversion.
The building has been seriously neglected by the owners, who view it as a "development opportunity", said a QC.
Conan Doyle scholar John Gibson, backed by many literary celebrities, was asking Justice Cranston to quash Waverley Borough Council's decision to allow the Grade II-listed building to be divided into eight separate homes.
Paul Stinchcombe QC, representing Gibson, founder of the Undershaw Preservation Trust, said there was strong public support for preserving Undershaw as a heritage asset because of its literary and historic importance.