The refresh sees Balfour Beatty signed up for the first time with other previous partners retained for another three years.
These include BAM Construction, Kier, Morgan Sindall and Morrison Construction.
The Hub also announced its second-level partners for projects up to £10m: Ashleigh (Scotland), CCG (Scotland), Cruden Building Scotland, Linear Design & Construct, McTaggart Construction, Ogilvie Group and Robertson Group.
Michael Ross, chief executive of hub South West said: “After a thorough tender process our contractor partners were selected due to their track record of delivering high-quality social infrastructure projects, expertise in cost management and ability to deliver our participants net zero ambitions.”
To date, hub SW has delivered over 90 local community-changing projects worth£754m across the education, social housing, healthcare, leisure, office and economic regeneration sectors.
A further £450m of projects are currently in the construction and development stages along with a healthy pipeline of projects.