The extension is expected to be completed by summer 2021, with the 68 new bedrooms located on the upper three floors. An outdoor terrace on the lower ground floor will create a separate space for smaller events with views overlooking Loch Lomond.

A design statement by architects 3DReid said the extension plans had been in the pipeline before the tragic fire in December 2017 which claimed the lives of two guests.

The statement said: “During the latter half of 2017, we worked closely with the hotel’s owners and operators to determine the most appropriate method by which to extend the hotel, whether it be via a separate building, numerous extensions, or part demolition and relocation.

“With the concept design progressing, we met with the Loch Lomond and The Trossachs National Park Authority during December 2017, taking on board their comments with the aim of further developing the proposal.

“Now fully developed, the proposal provides an additional 70 bedrooms, as well as a 350-person loch-facing ballroom, to the north of the hotel, adjoining the existing leisure wing.

“The bedrooms are formed over the upper floors, with the second-floor rooms incorporating dormer terraces which allow them to be set back into the roof space.

“The ballroom and associated function areas are situated at lower ground floor, with direct access onto large external terrace spaces, allowing for events and functions to spill out on to the surrounding lawns and providing spectacular views towards the loch.”

The statement added that the additional bedrooms were a result of high demand and would increase room nights by 40% within three years.

It is also estimated that the new ballroom will allow for a 50% increase in weddings at the venue within the same period.

The architects’ statement said: “The ballroom was a key desire of the hotel due to its lack of loch-facing function accommodation. The existing function suites are to the rear of the hotel, with limited views to the woodland beyond.

“The extension has been designed in such a way as to maximise views of the loch whilst achieving minimal disruption to the existing hotel facilities, and the team have liaised with Loch Lomond and The Trossachs National Park Authority throughout.

“The design has been developed and informed through such discussions, allowing the team to test and revise our proposals prior to this application being submitted.

“The final proposal is a contemporary building with a form and materiality that does not detract from the historically significant main building to the south.”

Andy Roger, resort director at Cameron House, said: “The proposed extension will maximise the stunning views of Loch Lomond whilst fully respecting the architectural integrity of the original house. The plans include a new loch-facing ballroom and 68 bedrooms, which will adjoin the hotel’s existing leisure wing.

“This will bring the resort’s total offering to 208 bedrooms, including 28 spectacular suites.”