Under the ownership of Halabi, the property was renamed Mentmore Towers Ltd, with the intention of converting it into a luxury hotel with 171 suites, including 122 in a new wing on the slope below the house. However, in September 2004, Jonathan Davey, a local resident, won a last-minute
injunction in the
High Court to halt work on the hotel while a
judicial review investigated whether the
planning permission granted had followed the correct procedures. In March 2005, the High Court ruled that
Aylesbury Vale District Council's decision to grant planning permission to the developers was "unimpeachable" and legally sound. Halabi's property company, Buckingham Securities Holdings, was also proposing to develop the In & Out Club at 79–81 Piccadilly, London, also known as Cambridge House and once occupied by
Lord Palmerston before it became the
Naval and Military Club. The intention was to turn both properties into Europe's first six-star hotels, one located in town and the other to be the sister Country Manor hotel with a 36-hole private golf club. The original architects, EPR, were replaced by AFR in 2005, but the development stalled in 2007. In 2004, Hotel Design Inc were retained as interior designers for both projects, leading to a 2005 launch event for the marketing of the properties as a private members' club with hotel facilities (the PM Club). The last proposal, after the sister Piccadilly property was sold to the Rueben Brothers in 2009, was to renovate the original Mentmore Towers building and not construct the new extension containing guest-room suites, conference facilities and a large spa. However, with Halabi's property empire in serious trouble due to the housing market's collapse, the project stalled, and the property was in decline. By April 2022, a report described it as "abandoned" and "left to rot".
"At risk" condition The house needs urgent work on the roof and chimneys. There is concern that weather will penetrate to the interiors, considered among the finest examples of Victorian design and craftsmanship in Britain.
Historic England (previously
English Heritage) has placed Mentmore Towers on the
Heritage at Risk Register, listing it in "poor" condition with "immediate risk of further rapid deterioration or loss of fabric", explaining that "the service wing roof is in very poor condition and the deterioration of the main house is accelerating with areas of water ingress into the main hall and adjacent reception rooms". By 2022, the need for restoration was classified as priority A (up from priority B in 2016–2021). The report states "immediate risk of further rapid deterioration or loss of fabric: no solution agreed' in spite of a restoration plan that had been previously completed". On 3 May 2024,
Thames Valley Police posted on their Facebook page that they had responded the previous night to a report of two people breaking into Mentmore Towers, which had become a regular occurrence. Officers had been curbing this and responding swiftly to apprehend those involved. ==Golf courses==