Chas Berger & Sons will undertake work in one area under a contract worth £11.8m.
A second area will be taken on by DW Contractors under a contract worth £11m.
The five-year partnership deals comprise the external planned maintenance programme including external re-decorations and associated repairs, re-roofing, and window and door replacement.
Catalyst has also awarded significant partnership contracts for heating systems improvements and for installation of electrical appliances such as entryphones and CCTV. See our Contract Awards section for further details for these and other deals.