Harris Aslam’s spokesperson said he was committed to completing the demolition of Allt-na-Reigh cottage.
They said: “The site is subject to an approved planning consent. However, works cannot fully commence until a building warrant and other necessary approvals are fully issued.
“This has taken longer than expected due to the challenging nature of the site, including its topography, access and the technical requirements involved in building in this location.”
The spokesperson said steps had been taken to make the site safe and to prevent any risk to the public, and Aslam was in contact with the relevant authorities as the process moved forward.
They added: “We are keen to see progress made and remain fully committed to moving ahead as soon as approvals are finalised, with the aim of delivering a development that sits well within its surroundings, respects the character of the area, and appropriately recognises the lasting and positive contribution made to Glencoe by the late Hamish MacInnes.”
NTS said: “We share concerns about Allt-na-Reigh’s current condition, and hope that action is taken soon to address this – both in terms of the visual impact graffiti has at this iconic site in the heart of Glen Coe, and safety concerns surrounding ongoing unauthorised access.”
Fort William and Ardnamurchan Lib Dem councillor Andrew Baxter said the cottage was a “blight” on the landscape.
He told BBC Radio Scotland’s Breakfast programme: “It’s an absolute mess and has been for almost a decade.
“Once the Savile affair became public knowledge, it became a magnet for vandalism and graffiti. It’s roofless and falling down.”