Blue Castle Capital Visualisation of the 50-storey planned proposal in Central Sqaure, Cardiff city centre. A large sky scraper can be seen glowing next to the Principality stadium.Blue Castle Capital

Plans for a 180 metres (580 ft) development would tower above the neighbouring Principality Stadium

Plans have been unveiled for Wales’ tallest building, surpassing Swansea’s 107m (351ft) Meridian Tower, and towering above the neighbouring Principality Stadium.

If approved, it is believed the 50-storey building in Cardiff city centre could make Wales home to the second the tallest building in the UK outside of London.

The site, which is located between Wood Street and Rose Lane, already secured planning permission for a 35-storey mixed-use tower in 2023.

But the new proposed skyscraper, standing at 580ft (180m), would hold more than 500 apartments as well as meeting rooms, an atrium, a bike hub and cafe.

Blue Castle Capital Visualisation of the planned pavillion restaurant next to the skyscraper in Central Square, Cardiff city centre.Blue Castle Capital

A pavillion restaurant and bar is planned for next door to the skyscraper

Standing at 1,016ft (309.6m) high, the Shard in Southwark, London, is currently the tallest completed building in the UK.

Outside of London, Deansgate Square South Tower, Manchester, takes the lead, at 656ft (200m).

The developers for the Cardiff site, Reap 3 limited, a subsidary of Bluecastle Capital, said the plans seek to build upon the success of the wider Central Square area.

The architects said they were inspired by skyscrapers such as The Equitable Building in New York using a tripartite formation, which consists of three parts, with a clearly defined base, middle and top.

The previously approved development planned commercial use for the ground floor, with a cafe or restaurant, and 364 residential apartments above.

If approved, the new building would have two staircases and five lifts, with a pavilion restaurant and bar planned next door.

For the top floor, developers are planning an enclosed glass roof terrace with views across “Cardiff and beyond”.

Blue Castle Capital Visualisation of the 50-storey planned proposal in Central Sqaure, Cardiff city centre. A large sky scraper can be seen next to the Principality stadium in daylight, along with Cardiff's skyline and railway lines.Blue Castle Capital

More than 500 apartments are proposed for the development, including meeting rooms, an atrium, a bike hub and cafe

Blue Castle Capital Visualisation of the 50-storey planned proposal in Central Sqaure, Cardiff city centre. A large sky scraper can be seen glowing along wood street during dusk.Blue Castle Capital

The development would sit between Wood Street and Rose Lane in Cardiff’s city centre

Nerys Lloyd-Pierce, chairwoman of Cardiff Civic Society, said massive towers were “outdated” and said the city had a “ridiculous obsession with having the tallest towers”.

“Looking at the Bristol Temple Meads development by comparison, there’s nothing above about 15 storeys, so a far more liveable design,” she said.