These blueprints, drawn by the Wellington architect W. P. Maule, show proposed modifications to the Palmerston North Chief Post Office building. These changes included the addition of a power house, relocation of doors and fireplaces and installation of steel columns, beams and girders. The plans were prepared in 1914, but it is unclear when the work was completed. A report in the Manawatū Standard stated: "The plans for the proposed additions have been prepared, and the work will be put in hand immediately." However, it was also "anticipated that owing to the war and the consequent difficulty in procuring the necessary materials" there may be delays in realising these developments (1 March 1916, p.5).

The original plans are held by Archives New Zealand as part of the Public Works Department - Maps and plans (Series / 22541).