A revised planning submission for the former Millbrook House hotel wants to create five-star accommodation with waterside cabins and a converted stable wing.
The resubmitted plans by CCA Galleries take the cost of the project to £29 million.
In 2021, a £14 million scheme was proposed to refurbish, upgrade and extend the disused hotel.
READ: £14m scheme to revitalise old hotel
The owner says post-COVID delays and increases in local construction costs meant the previously approved scheme became financially unviable.

CCa Galleries now wants to completely remove the 1970s block to make room for a modern extension and more bedrooms.
The new extension will provide one- and two-bedroom guest units with catering facilities, and a range of five-star individual suites.
Hotel guests will also have the option of five waterside cabins, a converted stable wing, or a suite within the refurbished original Villa or its Gatehouse.

The plans also include a woodland chapel within the grounds, a spa and wellness centre, a gym, and a Glasshouse cafe.

Mystery Man 'David Law' deported
Jersey football star recalls 'hectic' title-winning Celtic drama
Supertri to return to Jersey again for 2026
Teen boy sentenced for taking knife into Jersey school
Royal visitor to meet farmers, fishers and food producers
Cyclist suffers serious leg injuries in St Peter crash
'Arrive at work feeling more positive'
Profits rise at CI Co-op