The 100-year-old oak came down during Storm Freya and was found to be suffering from a fungal infection called ganoderma.
Tonbridge & Malling Borough Council employed a specialist contractor to remove the fallen tree and another adjacent tree that was found to pose a health and safety risk.
But further work must be carried out to allow access to the mound, which is a favourite attraction of locals and tourists alike.
Council Leader Nicolas Heslop said: “The damage is both unsightly and also prevents the public accessing the Motte.
“The Motte pathway is extremely popular and also forms part of the Castle audio tour.”
He added: “The council is seeking quotations to reinstate the path and the fence, and we are in liaison with English Heritage to enable the works to be progressed without delay.”
An initial budget estimate of £20,000 has been identified with more accurate costings being put forward for approval this week.
Funding is available to help cover the costs through a grant of £20,231 from the Government’s Local Authorities Parks Improvement Fund.
The award was made for remedial and renovation works and addressing health and safety concerns in parks.
Any outstanding amounts will be covered by TMBC’s General Revenue Reserve.
