The accommodation problem was at first solved with the building of temporary huts. These were later replaced with more substantial buildings. Forward O.P.s and wireless telephone rooms were established at Baring Head, Beacon Hill and Sinclair Head, complete with accommodation for the detachments manning them. Radar was added to the installation itself in 1941.
In August 1941 it was decided to construct underground plotting and wireless rooms. This work involved the construction of an access road, an access tunnel, two plotting rooms, an engine room and two wireless rooms. Two entrances were constructed, one to the north, the other the west. A site for a third gun was surveyed in April 1942, and approval was given in September. The work was completed in early 1943. For this emplacement an underground magazine, shell hoist, 105ft of access tunnel and a war shelter was constructed.
Reinforced concrete overhead covers were provided for the three guns, but trouble was experienced in designing a steel gun shield to suit the conditions at the site. One was fitted for trial and experiment, but was eventually abandoned.
The battery had gone to Care and Maintenance on 27 March 1944, retaining sufficient personnel and ammunition to be in action within 10 minutes. After the 10th Heavy Regiment was stepped down in September 1945, the guns were greased down and all ammunition, over the allowance of 30-minutes supply for each gun and 3 years of practise, transferred to the Belmont Magazines. Palmer Head was decommissioned permanently in 1957, in accordance with all the other batteries in the country. The guns and turrets of the battery, however, were still in place as late as June 1960, but were probably scrapped not too soon after.