Short answer: Before power or broadband is disconnected at a vacant building, ask the responsible alarm maintainer to confirm what will continue working, how alerts will reach the agreed recipient and what temporary arrangements are needed. Name someone to authorise the change and someone to verify the system afterwards. A battery symbol or a working app is not a complete continuity plan.
A landlord may be ending a broadband contract between tenants, or a contractor may need an electrical isolation during refurbishment. Both changes belong in the property’s security brief before the work starts. This guide is a management checklist for a planned interruption, not instructions for isolating electrical equipment or configuring an alarm.
Describe the proposed change before asking about backup
Give the maintainer a clear description of the work and the expected interruption. Distinguish a short, supervised maintenance task from a disconnection lasting for the remainder of a vacancy. If the duration is uncertain, say so rather than treating the contractor’s initial estimate as a guaranteed restoration time.
- Which supply or communications service is being changed?
- Who controls the work and can confirm when it has finished?
- Will anyone be authorised to occupy or visit the building during the interruption?
- Are the alarm, cameras and other building systems maintained by different organisations?
- Who owns the decision if the interruption lasts longer than expected?
Keep equipment identifiers, account information and detailed access arrangements in a restricted handover. Do not put passwords, codes or a building’s periods without protection in a general email chain.
Separate detection, communications and attendance
Ask three different questions: will the specified detection continue, will the relevant event reach its intended recipient, and what action has that recipient agreed to take? A local alarm indication does not by itself confirm that a monitoring provider has received an event. Equally, receipt of an app notification does not establish a physical attendance service.
If a broadband service is being cancelled, have the maintainer identify whether the alarm actually uses that connection and whether an alternative route is configured and suitable. Do not assume that a cellular option printed on a product description means it is installed, active and working at this property.
Where cameras are also present, ask about their power, recording and communication arrangements separately. Do not extend an answer about an alarm hub’s backup supply to every camera or recorder in the building.
Confirm the limits for the installed equipment
Ajax’s power-outage guidance explains that backup operation varies with the hub, battery and system configuration. It also describes power-saving modes that change communication behaviour. This is why a quoted maximum from a different model or configuration should not become the building’s assumed protection period.
Ask the authorised maintainer to record the equipment covered by the assessment, relevant battery condition, expected operating conditions and any limitations. Agree when the arrangement needs reviewing. Do not enable a power-saving option, replace a power supply or connect an improvised battery simply to extend an estimated runtime.
For longer vacancies without mains power, the appropriate question is whether a different system design and maintenance arrangement is needed. It is not whether an ordinary backup battery can be expected to cover an indefinite disconnection.
Agree the interruption with the people receiving alerts
Where monitoring is contracted, notify the provider through its agreed procedure before any planned work affecting the service. Confirm how maintenance-related events will be handled, who can authorise changes and how normal arrangements will be reinstated. Do not ask a contractor to silence or suppress an alarm informally.
If protection will be reduced, the property manager should agree proportionate temporary measures with the relevant providers. These might include a revised inspection arrangement or separately scoped security cover. Check any insurer requirements with the insurer or broker; do not assume an extra visit automatically satisfies the policy.
Record the responsible person, the agreed temporary scope and the action to take if the work overruns. Keep the operational detail private. Our alarm escalation planning guide can help organise responsibilities without publishing sensitive instructions.
Verify restoration before closing the task
Restored electricity or an internet connection is the start of the follow-up check. Have the authorised maintainer and any monitoring provider complete the relevant agreed checks and confirm the result. Use the supported testing procedure; do not create an unannounced alarm activation to see who arrives.
Record what was checked, any unresolved fault, who owns the next action and whether temporary measures must remain. Do not close the task solely because a contractor says the mains supply is back on. Electrical work should be carried out by someone competent for that work; HSE’s electrical safety guidance explains the importance of appropriate competence.
Include utilities in the vacant-property proposal
ZimCos’s vacant-property alarm service considers power, communications, verification and the agreed monitoring scope together. To discuss an installation or a change to an existing arrangement, send the property postcode, expected vacancy period, existing equipment and the proposed utilities change. Suitability, scope and availability need confirmation for the particular property.
Featured image: a company archive photograph of an entrance during building work. It provides construction context and does not identify a vacant property, an Ajax installation or an interruption to protection.