Hi all, I have just finished a job on a house that's had quite a large extension added. My work was to install all the circuit's for the extension and install a new c/unit that supplies the whole house. The owner/builder was insistent that he didn't want any mains smoke detectors fitted but I am now wondering if it was my responsibility to make sure that smoke detectors were installed as i'm certifying and notifying the electrical installation? There was no mention of smoke alarms in the plans which would have been passed by building control. This concern occured to me as I was completing the cert!