Griffiths Architects prepared the conservation plan for Dilhorn in 1995 for the Department of Defence. Previously, the owners had restored all of the internal and external joinery, conserved the verandahs, redecorated all of the interiors and enhanced the gardens. The external finishes were left in a state of disrepair.
The project compromised of tuck-pointing the brickwork and re-pointing the foundations to the south, east and west façades. The re-pointing was required for both aesthetic and presentation purposes and to combat severe joint erosion.