The development on Sylvester Street will deliver 335 flats and also features community roof terraces, and two commercial spaces totalling 7,650 sq ft.
Winvic will construct the 7- and 14-storey brick-clad complexes using a steel frame structure.
The other BTR scheme that Winvic is currently constructing for PLATFORM_ is located on Dumballs Road, Cardiff and comprises 206 one-bed and two-bed apartments over two tower blocks.
Mark Jones, Winvic’s Director of Multi-room, said: “We’ve been working in partnership with PLATFORM_ for some time in preparation for both projects and we’ve built a strong relationship due to our shared vision of quality accommodation through good design that’s simply done right.
“With over 7,000 multi-room beds developed to date and a further 3,000 plus under construction, the expertise of our teams will make the road to handover a smooth one on these prestigious schemes.”