Bouygues will start work on Phase 2b of the regeneration next June 2022 with work expected to take around two years to complete.
Construction information specialist Barbour ABI has a value of £84m for the work.
Once complete, the Portobello Square regeneration project will deliver around 1,000 new homes, with no loss of social housing, new commercial and community spaces and 2.3 acres of new public park.
This phase of the regeneration will deliver 230 new homes, including 108 homes for social rent alongside 11 homes for shared ownership.
Richard Smith, Managing Director New Homes London at Catalyst said: “Despite the excellent quality of the submissions we had from construction contractors, it was clear that Bouygues UK were the best team to take forward the construction of the next phase of Portobello Square.
“This marks a significant milestone in developing a significant number of new homes for families in North Kensington.”
Rob Bradley, CEO at Bouygues UK said: “We are delighted to be appointed to deliver the next phase of Portobello Square. Our experience on projects like this across London, and with ensuring minimal disruption for the local community, will ensure the successful delivery of this phase.
“Having previously worked with Catalyst on flagship projects such as Havelock Estate in Ealing, we look forward to working alongside the team again to support its ambition to reinvigorate this iconic part of London.”