Residents with access to the world's first transparent sky pool say no one is using it during winter - despite it costing them £450 a day to heat.
The Embassy Gardens Sky Pool, which is suspended at 115ft between two residential blocks, was opened in May this year.
People living in the development, in Nine Elms, south London, are now calling for it to close during winter as they revealed it is costing residents the equivalent of £90 per swim.
The 82ft pool, which is uncovered and can only be used by residents and guests, is up to three metres deep.
It costs £164,250 to keep the water heated all year round.
Those in a two-bed flat in the development pay a service charge of up to £9,000 a year, with a large portion of the money going towards both the Sky Pool and another pool on-site.
The Sky Pool's opening was initially delayed by Covid, but it has since been in operation from May.
The water is kept at a consistent temperature of 30C - but two residents have claimed it is barely being used due to the cold weather.
They told The Sun: "It is too cold to be used at the moment so it seems mad that we’re still having to pay to heat it.
"If it’s £450 a day and, at most, five people are using it, that’s £90 per swim. That hardly seems like value for money."
Another resident also said they were "livid" about the costs during winter, stating that their money was being spent on "basically heating the sky".
The residents' association now plans to demand the pool be closed during winter to save money, The Sun reports.
A spokesperson for Ballymore, the property's developers, said: "The Sky Pool is a world-class leisure facility unlike any other swimming pool in London, providing an unrivalled experience for Embassy Garden residents and their guests throughout the year.
"We know from residents how popular the pool is even during colder periods. The pool is used by residents every day and has been used 90 times in the last seven days alone.
"Embassy Gardens provides residents with a range of luxury amenities, while keeping service charges markedly lower than at comparable developments elsewhere in the Nine Elms area.
"The Sky Pool is kept at a constant temperature of 30 degrees Celsius which is the standard for leisure pools."
