Planning approved for sustainable build-to-rent tower in Cardiff

Planning permission has been granted for a 50-storey build-to-rent tower at Central Square in Cardiff, set to become the tallest building in Wales.

The scheme, designed by 5plus for developer Bluecastle Capital, will deliver 528 residential units alongside a significant package of resident amenities and publicly accessible ground floor uses. The development forms the final phase of the wider Central Square masterplan, occupying a prominent site between Cardiff Central Station and the Principality Stadium.

Totalling more than 500,000 sq ft, the tower has been designed as a landmark addition to the city skyline, with a slender profile and a tripartite façade structure comprising base, middle and crown, culminating in an illuminated pinnacle.

At ground level, the development will introduce a two-storey pavilion designed to activate the public realm, incorporating dining and leisure uses. A publicly accessible cycle hub, including a café and repair facility, will also be delivered as part of the scheme, alongside new and enhanced public space.

The residential offer will be supported by four levels of amenity space, including co-working areas, wellness facilities and a 360-degree roof terrace. Upper floors will include larger penthouse apartments with private balconies and dual-aspect views.

Sustainability measures are central to the project, which is targeting BREEAM Excellent and Fitwel 3-star certification, alongside alignment with UK Green Building Council and LETI net zero pathways. The building will incorporate an all-electric energy strategy, high-performance façade systems and biodiversity enhancements including green roofs.

Cardiff Council’s planning committee described the proposal as “by far the tallest building ever considered” in Wales, with members praising the design and its contribution to the city’s evolving skyline.

Construction is expected to begin in 2027, with completion targeted for 2029.