got a reply from a sale agent when I query about the wired alarm system, is this common practice or just cost of saving from Builders?
There is no wiring for an alarm.
Most alarms are wireless now and can be installed by buyers once the sale completes.
Cluain Ard in Blarney has wiring for alarm, all new builds
My new build had wiring for alarms but we still went wireless anyway
My new build came wired for alarm. After checking wired vs wireless, we thought that wired was more reliable, but maybe now, two years later, that is not the case anymore