Intruder Alarm Monitoring Service
Intruder Alarm Monitoring Service in London – Fast, 24/7 Protection
Securex is an NSI-certified security company providing 24/7 intruder alarm monitoring across Greater London for homes and businesses. Our monitoring service connects your property directly to a dedicated alarm receiving centre staffed by trained specialists who take immediate action when an alarm activation occurs.
A monitored alarm system does far more than make noise—it triggers a real response. When your intruder alarm activates, operators at the alarm receiving centre ARC verify the alert and follow your pre-agreed response plan, which can include contacting keyholders, notifying the local police force, or dispatching security personnel to your property.
Securex can design, install, monitor, and maintain intruder alarms from scratch. We also take over monitoring of existing compliant systems from other providers, so you don’t necessarily need new equipment to get professional protection.
What you get with Securex intruder alarm monitoring:
Reduced burglary risk through rapid response to confirmed break ins
Insurance compliance with NSI-approved monitoring that meets insurer requirements
Protection when your premises are empty—nights, weekends, and holidays
Complete peace of mind knowing trained professionals are watching your property 24/7/365
What Is Intruder Alarm Monitoring?
Intruder alarm monitoring means your alarm system is connected around the clock to a UK-based alarm receiving centre where trained operators verify and act on alarm signals. Rather than relying on a bell or siren that neighbours might ignore—or that sounds when nobody is nearby—a monitored alarm sends signals directly to professionals who can take appropriate action within seconds.
The signal path works through dual-path signalling, typically using both IP (broadband) and 4G cellular networks. This redundancy ensures that even if one communication method fails, the alarm signal still reaches the monitoring centre. For a shop on Oxford Street, this might mean the alarm panel sends data over the shop’s internet connection and simultaneously via a built-in SIM card. For a block of flats in Croydon, the system ensures constant surveillance of all monitored zones regardless of individual internet reliability.
Monitoring covers various alarm events beyond simple intrusion detection. These include tamper alerts (someone interfering with the system), personal attack signals (panic buttons), power failures, and system faults. The ARC sees all of these, meaning technical problems get flagged before they become security gaps.
When an alarm appears on the operator’s screen—typically within seconds of activation—they verify the event where possible and follow a pre-agreed response plan. Here’s a concrete example: your retail unit’s motion sensor triggers. The monitoring centre operator has reviewed the alert, checked for sequential sensor activations (which confirm genuine intrusion rather than a single false trigger), and called your designated keyholder. If the keyholder confirms they’re not on site, the operator contacts emergency services or dispatches a response team according to your instructions.
How Intruder Alarm Monitoring Works with Securex
When a sensor detects movement, a door opening, or glass breaking, your control panel processes the information and determines whether it represents a genuine security breach. If the detection meets the programmed criteria—for example, two independent sensors activating within a short timeframe—the panel transmits an alarm signal to the monitoring centre via your chosen communication path.
The ARC receives this signal within seconds. Operators see details including your site address, the specific zone that activated, and the type of alarm event. Signal receipt, the operator begins verification and response procedures. This happens 24/7/365, including bank holidays, weekends, and the early hours when most burglaries occur.
Securex uses NSI-approved monitoring partners in the UK with resilient infrastructure. These facilities run on generator-backed power with redundant communication lines, meaning a local power cut or network issue won’t prevent your alarm from being monitored. The monitoring centre continues operating even during widespread outages.
Response instructions are agreed with you during setup. You provide a keyholder list with contact details and the order in which people should be called. For commercial premises, this might include a facilities manager, duty manager, and contracted guarding company. For homes, it might be you, your partner, and a trusted neighbour. If you’ve registered a police URN (Unique Reference Number) with your local police force, we can request police response for confirmed intrusions in specific London boroughs.
Securex can integrate intruder alarm monitoring with CCTV, fire alarms, and access control for customers wanting a single, joined-up response plan. This means one ARC, one set of response instructions, and one point of contact for all your security monitoring needs.
Example flow for a commercial property:
“If the motion sensor in Zone 3 (warehouse) activates between 22:00 and 06:00, confirm with a second sensor activation. If confirmed, attempt keyholder contact. If no answer within 3 minutes, dispatch contracted guard response and log for police notification.”
Example flow for a residential property:
“If the front door contact sensor activates while the system is armed, call the primary keyholder immediately. If confirmed as a break-in or no response after 5 attempts, notify the police using the registered URN.”
Benefits of Monitored Intruder Alarms
A monitored alarm system offers substantially more protection than a bells-only alarm for London homes, retail units, offices, and industrial premises. The difference lies in guaranteed response rather than hoping someone nearby will hear and act.
Faster intervention: When an intruder knows an alarm is monitored, they also know that security or police response is likely on the way. Many potential intruders abandon attempts the moment an alarm sounds if they believe it’s connected to a monitoring service. For those who proceed, swift response means less time to cause damage or steal property.
Reduced losses: The average burglary takes 8 to 10 minutes. A monitored system that triggers response within 60 seconds dramatically reduces how much can be taken or damaged before help arrives. Combined with CCTV monitoring, you also get evidence for insurance claims and potential prosecution.
Greater deterrence: Signage indicating NSI-approved monitoring acts as a visible deterrent. Professional criminals often scout premises before attempting entry—they look for alarm boxes, monitoring stickers, and camera systems. A professionally installed, monitored system signals that your property isn’t an easy target.
Insurance advantages: Many insurers for commercial premises on policies renewed after 2024 now require professionally monitored intruder alarms for higher-value risks. HMO landlords, retailers with stock, and offices with IT equipment increasingly find that monitored systems are a condition of cover rather than an optional extra. Having NSI Gold accredited monitoring can also reduce premiums.
Specific use cases in London:
High-street shops in areas like Camden, Brixton, or Stratford where evening footfall means staff leave while potential threats remain active
Small warehouses in Park Royal storing valuable inventory overnight
HMO properties in East London where landlords aren’t on site but need to know about security breaches immediately
Multi-site businesses with remote branches that can’t justify on site security at every location
Reduction of false alarms: Verification protocols—including sequential sensor confirmation and video verification where available—mean the monitoring centre can distinguish genuine intrusions from cats, HVAC movement, or staff forgetting to disarm. This saves keyholders from unnecessary late-night callouts and prevents wasted police call-outs that could result in URN suspension.
Securex Intruder Alarm Monitoring Options
Securex offers flexible monitoring packages for both B2C (homeowners, landlords) and B2B (offices, retail, industrial) customers across Greater London. We tailor monitoring solutions to match your security requirements, risk profile, and budget.
Keyholder-only response: The monitoring centre contacts your designated keyholders when an alarm activates. This suits lower-risk premises or situations where you prefer to assess the situation yourself before involving police. Operators work through your keyholder list until someone confirms they can attend or instructs further action.
Keyholder plus police response: For premises registered with a police URN, the ARC can request police response for confirmed intrusions after keyholder notification. This is the standard for commercial premises with stock or equipment, and for residential properties in higher-risk areas. Police response depends on your local borough’s policies and the verification level of the alarm.
Integrated monitoring with CCTV video verification: When your alarm systems include cameras, operators can view live or recorded footage the moment an alarm triggers. This provides immediate visual confirmation of whether an intruder is present, enabling priority response from police and eliminating delays caused by unverified activations. Video verification represents the highest level of monitoring available and is increasingly requested by insurers.
Communication paths include IP (broadband), GSM/4G cellular, or dual-path signalling combining both. Dual-path is recommended for commercial premises and any property where insurance compliance matters—it ensures the alarm signal reaches the ARC even if someone cuts your phone line or broadband fails.
Customers can combine intruder monitoring with fire alarm monitoring, access control event monitoring, and door entry system integration. Managing these under one Securex contract simplifies administration and ensures consistent response procedures across all your key security systems.
Intruder Alarm Monitoring Costs & Contracts
Pricing for alarm monitoring services depends on several factors: the type of premises (home versus commercial), number of monitored zones, signalling method, and level of response required.
Typical London pricing examples:
Customer Type | Typical Monthly Cost (excl. VAT) | Notes |
|---|---|---|
Homeowner (standard monitoring) | From £20–£35 | Keyholder response, single communication path |
Homeowner (police URN + dual-path) | From £35–£60 | Enhanced signalling, registered police response |
Small retail/office | From £60–£80 | Dual-path, keyholder + police, multiple zones |
Multi-zone commercial | From £80–£100+ | Video verification, integrated fire/access monitoring |
Customer Type
Typical Monthly Cost (excl. VAT)
Notes
Homeowner (standard monitoring)
From £20–£35
Keyholder response, single communication path
Homeowner (police URN + dual-path)
From £35–£60
Enhanced signalling, registered police response
Small retail/office
From £60–£80
Dual-path, keyholder + police, multiple zones
Multi-zone commercial
From £80–£100+
Video verification, integrated fire/access monitoring
These are indicative ranges. Your actual cost depends on site survey findings, existing equipment, and specific requirements.
Securex offers flexible contract terms, typically 12 to 36 months. We can structure packages to include installation, scheduled maintenance, and emergency call-outs in a single monthly fee—providing cost savings compared to paying for each element separately. This also supports business efficiency by giving you predictable security costs.
We provide clear, written quotations upfront. There are no hidden activation fees or surprise “admin” charges beyond what’s specified in your proposal. If additional cost is required for equipment upgrades or extra zones, we detail this before you commit.
Compliance, Accreditation & Insurance Requirements
Securex is NSI Gold certified and uses only NSI-approved alarm receiving centres. This matters because major UK insurers recognise NSI accreditation as the benchmark for professional security systems and monitoring services. An NSI-approved system and ARC combination typically satisfies insurer requirements without additional negotiation.
Our installations comply with relevant British and European standards, including BS EN 50131 for intruder alarm systems and the PD 6662 framework that underpins UK grading and response requirements. You don’t need to understand these standards in detail—what matters is that your system meets them, and we ensure it does.
Many commercial and HMO insurance policies in London now specify monitored alarms, regular maintenance visits, and event logging as conditions of cover. If your policy includes these requirements and you don’t comply, you risk having claims rejected after a burglary. Securex helps you avoid this by providing systems and documentation that meet or exceed typical policy conditions.
We supply certification and documentation needed for insurers, including:
Installation certificates confirming system grade and compliance
Maintenance records showing scheduled servicing
System design details and zone schedules where required
ARC confirmation letters for policies requiring evidence of monitoring
This documentation protects you if you ever need to make a claim. It demonstrates that you maintained appropriate protection and that your site security met professional standards at the time of any incident.
Integrated Monitoring: Intruder, CCTV, Fire & Access Control
Securex can link intruder alarms with CCTV monitoring so ARC operators visually verify intrusions the moment an alarm triggers. When a motion sensor activates, the operator immediately views the corresponding camera feed. They see whether it’s a genuine intruder, a staff member who forgot to disarm, or a false trigger from an environmental factor. This video verification capability dramatically improves response accuracy and enables priority response from police.
Integration extends to fire alarm monitoring for early fire detection. When smoke or heat detectors activate, the same ARC that handles your intruder alarms receives the signal and initiates fire response procedures—contacting the fire brigade and your designated fire wardens. Having fire and intruder monitoring on one platform means simpler management and consistent response.
Access control and door entry systems can also feed into the monitoring platform. The ARC can log access events, receive alerts for forced doors or access attempts outside permitted hours, and even remotely grant or deny entry in specific scenarios.
Concrete example: A mixed-use building in central London has retail units on the ground floor, offices above, and residential flats on upper levels. Securex provides monitored intruder alarms for the retail units, fire alarms covering common areas and escape routes, and CCTV monitoring at all entrances. The building’s facilities manager receives a single monthly report covering all systems, and any alert—whether intrusion, fire, or suspicious activity at the front door—goes to one monitoring centre with clear escalation procedures.
This integration helps facilities managers and landlords manage multiple risks without juggling several providers, contracts, and points of contact. Starting with intruder monitoring? Integrated fire, CCTV, and access control represent natural upgrade paths as your security requirements evolve.
Who Our Intruder Alarm Monitoring Service Is For
Securex intruder alarm monitoring serves a wide range of customers across Greater London:
Homeowners wanting protection while away at work, on holiday, or during the night
Private landlords with single or multiple rental properties requiring reliable security without constant personal oversight
HMO operators managing properties with multiple tenants and shared access points
Retail and hospitality businesses protecting stock, tills, and equipment outside trading hours
Offices and professional premises safeguarding IT equipment, confidential documents, and client data
Data rooms and server facilities where even brief intrusions could cause major business disruption
Light industrial units with tools, materials, and vehicles at risk during unmanned periods
Scenario 1: A landlord owns four flats across different London boroughs. They can’t personally respond to every alarm at 3am, but they need to know about genuine security breaches. Securex provides keyholder-response monitoring, calling the landlord first and then a local property manager if needed.
Scenario 2: A small chain of coffee shops has three locations in North London. Each site needs police-monitored alarms with video verification to satisfy their insurer and protect expensive equipment. Securex provides consistent monitoring across multiple locations with centralised reporting for the operations manager.
Scenario 3: A home security-conscious family in South London wants total peace knowing their property is protected while they travel for work. They opt for dual-path monitoring with police URN registration, combined with a video doorbell monitored by the same ARC.
Securex works with both single-site clients and multi-site businesses with centralised facilities or security management. Whether you have one property or twenty, we provide scalable remote monitoring services that grow with your needs.
Installation, Takeover & Maintenance
Securex can install new NSI-compliant intruder alarm systems or take over monitoring of existing systems from other providers. If your current alarm is from a different supplier but meets compliance standards, we can often adopt it onto our monitoring platform after inspection and any required upgrades.
Typical process for new installations:
Site survey: Our security experts visit your property to assess risks, identify vulnerable entry points, and understand your operational patterns
System design: We specify the appropriate control panel, sensors, communication method, and zone configuration based on survey findings and your security requirements
Installation: Our engineers install all components, typically completing residential systems in one day and commercial systems in one to three days depending on size
ARC connection: We configure signalling to the alarm receiving centre and test all communication paths
Testing and handover: Every sensor and zone is tested. You receive training on arming, disarming, and managing your system
Response instructions: We agree and document your keyholder list, response procedures, and any police URN details
For monitoring takeovers: We inspect your existing system, confirm compatibility, upgrade any components that don’t meet current standards, reconfigure signalling to our ARC, and test thoroughly before going live.
Securex offers scheduled maintenance—typically annual or six-monthly visits depending on risk category and insurer requirements. Maintenance visits keep your system in line with NSI standards, identify developing faults before they cause false alarms, and ensure sensors remain properly positioned and calibrated.
We also provide 24/7 emergency support for faults or unexpected alarm events. If your system develops a problem at midnight on a Sunday, you can reach our engineers—not an answering machine.
Why Choose Securex for Intruder Alarm Monitoring?
Securex provides NSI Gold accredited security services across Greater London, with 24/7 UK-based monitoring through approved alarm receiving centres. We’ve protected residential and commercial sites throughout the capital for years, building experience across sectors from retail and hospitality to residential property management and light industrial.
Unlike large national competitors who may route your calls through distant call centres, Securex offers a single point of contact for design, installation, monitoring, maintenance, and emergency support. You speak to people who know your system and your property, not a different operator every time.
Our full security portfolio includes:
Intruder alarms and burglar alarms
CCTV system installation and CCTV monitoring
Fire safety systems and fire alarms
Access control and door entry systems
Data cabling and networking
Electrical services
This extensive range means you can consolidate your security with one trusted provider rather than managing relationships with multiple alarm companies.
Why customers choose Securex:
NSI Gold certification meeting the highest industry standards
Rapid response and priority response procedures for confirmed intrusions
Experience across London sectors including schools, offices, apartment blocks, and retail
Transparent pricing with no hidden charges
Flexible contracts suited to homeowners and businesses alike
Local engineers who can attend your London property quickly when needed
When you need to keep your business safe or protect your home security, you want security experts who combine advanced technology with genuine accountability. That’s what Securex delivers.
Get a Quote for Intruder Alarm Monitoring
Ready to protect your London property with professional monitoring? Request a free, no-obligation consultation for monitored intruder alarms.
What we’ll ask you:
Property type (residential, commercial, mixed-use)
Address or postcode for site assessment
Existing alarm make and model (if applicable)
Insurer requirements or policy conditions
Any special risks (high-value stock, unique challenges, remote location)
How to contact us:
Phone: Call our team during business hours or use our 24/7 emergency line
Email: Send your enquiry and we’ll respond within one business day
Online form: Submit your details and receive a same-business-day callback (Monday to Friday)
We’ll provide a clear proposal outlining the recommended equipment, monitoring level, monthly fee, and any upfront costs. No pressure, no jargon—just straightforward information to help you make the right decision for your property.
Whether you need a new professionally installed alarm system or want to transfer monitoring of your existing setup to a responsive UK provider, Securex is ready to help. Contact us today for peace of mind that your property is protected around the clock.
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