To date, 37 buildings have been completed, and work is underway on a further 86 buildings, with remediation work to start on more buildings this year.
Hyd yn hyn, mae 37 o adeiladau wedi'u cwblhau, mae gwaith yn mynd rhagddo ar 86 o adeiladau eraill, a bydd gwaith cyweirio yn dechrau ar ragor o adeiladau eleni.