Intruder Alarm Service Near You – Professional NSI-Certified Protection in London
Intruder Alarm Service Near You – Get Fast, Local Help from Securex
Securex provides NSI-certified intruder alarm installation, maintenance, repairs and 24/7 emergency support across Greater London for homes and businesses. As a professional security company, we understand that when your alarm system fails or you need protection installed, waiting days for a response simply isn’t acceptable. That’s why we’ve built our service around fast, local coverage—attending the same day in all London boroughs.
Our engineers carry the equipment and expertise to resolve most issues on the first visit, giving you peace of mind that your property remains protected.
Key services we provide:
New intruder alarm installation for homes and businesses
Annual and twice-yearly alarm servicing contracts
Emergency fault callouts and repairs (24/7 availability)
System upgrades and technology refreshes
Police-monitored alarm setup with URN registration
Integration with CCTV, access control and fire detection
To get started, simply call our London office or complete our short online form. We’ll provide a same-day quote and can often book your survey or callout within 48 hours.
Intruder Alarm Installation Near You – London Homes & Businesses
Securex designs and installs intruder alarm systems for flats, terraced houses, detached homes, HMOs, offices, retail units, warehouses and schools across Greater London. Every property presents unique challenges—from Victorian terraces with thick walls to modern glass-fronted offices—and our engineers assess each site individually to recommend the right solution.
All systems are installed by NSI-approved engineers and are fully compliant with insurers and NPCC Security Systems Policy where monitoring is required. This means your installation comes with proper documentation, making insurance claims and police response straightforward.
What to expect from our installation service:
Free on-site surveys in areas including Croydon, Enfield, Bromley, Harrow, Ealing, and Stratford—usually within 48 hours of enquiry
Risk assessment covering entry points, internal zones and any specific vulnerabilities
Full compliance with insurance requirements, including grading and maintenance schedules
Both standalone burglar alarms and integrated packages combining intruder alarm, CCTV, access control and fire detection
Clear, itemised quotes with no hidden costs
Professional installation by time-served, vetted engineers
Whether you’re a homeowner looking to protect your family or a facilities manager securing multiple sites, we tailor every burglar alarm installation to your property’s layout, risk level and budget.
Types of Intruder Alarm Systems We Install
Securex installs a full range of intruder alarm types, from simple bells-only systems to fully monitored, app-controlled and police-response alarms. The right choice depends on your property, insurance requirements and how you want to be notified when something happens.
We design systems to suit typical London properties—Victorian terraces with cellars and multiple floors, new-build apartments with open-plan layouts, multi-storey offices and industrial units with loading bays. During your consultation, we’ll cover risk assessment, insurance requirements, budget and any existing equipment that can be reused.
At a high level, here’s what we offer:
Bells-only audible alarms for lower-risk properties
Monitored intruder alarms connected to an alarm receiving centre
Police-response systems with URN registration
Wired, wireless and hybrid installations
Smart app-controlled systems with remote management
The sections below explain each main alarm type in more detail.
Bells‑Only Intruder Alarms (Audible‑Only Systems)
Bells-only alarms activate an internal sounder and external siren/strobe at the property when a break-in is detected. They’re designed to scare intruders and alert neighbours, creating an immediate deterrent without requiring ongoing monitoring contracts.
These systems do not send signals to an alarm receiving centre, though many modern panels can be linked to a homeowner app for smartphone alerts if required. This gives you awareness of triggered events without the cost of professional monitoring.
When bells-only alarms make sense:
Smaller London homes, flats and rental properties where insurance doesn’t demand monitoring
Low-risk commercial units such as storage rooms or workshops
Budget-conscious installations where the priority is deterrence rather than police response
Properties where neighbours are close enough to respond to an audible alert
Typical costs:
Full installations in a London 3-bed semi typically start from around £550–£900 + VAT depending on layout and the number of sensors required.
Pros and cons to consider:
Lower upfront cost and no monthly fees
Simple operation with standard keypad arming
No automatic emergency response—relies on neighbours or your own awareness
May not satisfy insurers for high-value contents or commercial stock
Monitored Intruder Alarms with ARC & Police Response
Securex provides 24/7 monitored intruder alarms connected to a UK alarm receiving centre for automatic response. When your alarm signal is triggered, the ARC receives the notification immediately and follows a verification protocol before contacting you, keyholders or the police.
For police response, systems must be installed and maintained by NSI-approved companies like Securex and issued with a Unique Reference Number (URN) under the NPCC Security Systems Policy. This ensures police treat activations as genuine and prioritise response.
Who typically needs monitored alarms:
High-value homes in London, particularly detached properties or those with valuable contents
Jewellery shops, pharmacies and retail units with stock attractive to thieves
Warehouses and offices storing IT equipment, cash or sensitive materials
Properties in higher-risk London areas where response time is critical
How the monitoring process works:
Sensors detect a potential intruder and send an alarm signal to your control panel
The panel transmits the alert to the ARC via cellular, IP or dual-path connection
The ARC attempts to verify the event—often using audio or video confirmation
If verified, the ARC contacts police using your site’s URN
You and your keyholders receive notifications throughout
Contract terms:
Monitoring contracts are available on flexible terms (12-month or 36-month) with clear, transparent monthly fees. There are no hidden call-out charges for faults covered under your maintenance agreement.
Wired vs Wireless Intruder Alarm Systems
Securex installs both wired and wireless intruder alarms, as well as hybrid systems that combine the two. The right choice depends on your property type, aesthetic preferences and how much disruption you’re willing to accept during installation.
Wired systems:
Robust communication between sensors and panel—ideal for larger properties
Perfect for new builds or properties undergoing renovation where cables can be hidden
Minimal battery changes required (only backup panel batteries)
Higher installation cost and longer fitting time
Wireless alarm systems:
Faster installation with less disruption—often completed in a single day for London apartments
Ideal for finished properties, listed buildings or rentals where you can’t run cables
Wireless devices require battery replacement every 2–5 years
May need signal surveys to address thick Victorian walls or basement interference
Hybrid systems:
Combine wired door contacts on main entry points with wireless motion sensors in harder-to-reach areas
Offer flexibility for phased installations or future expansion
Our engineers perform a signal survey for all wireless devices to ensure reliable communication throughout your property. This is particularly important in London’s older housing stock where solid brick walls and basements can affect signal strength.
Intruder Alarm Servicing, Maintenance & Repairs Near You
Securex offers one-off services and ongoing maintenance contracts for existing alarm systems, even if we didn’t install them originally. Regular servicing keeps your system reliable, reduces false alarms and ensures you remain compliant with insurance requirements.
Annual or twice-yearly servicing is often required by insurers for monitored systems and recommended for all alarms. A well-maintained system is far less likely to fail when you need it most—and far less likely to cause nuisance activations that frustrate you and your neighbours.
Brands we service:
We cover most reputable brands in the UK market, including Texecom, Honeywell/ADI, Pyronix, Orisec, Scantronic and Hikvision intruder panels. We can also work with some legacy systems where parts remain available.
What a standard service visit includes:
Full system testing of all zones, sensors and sounders
Battery checks and replacement where needed
Event log review to identify any patterns or issues
Bellbox and sensor inspection for damage or tampering
Minor adjustments to motion sensors for optimal coverage
Written service report for your records and insurer
Regular maintenance typically costs a fraction of emergency repairs and can extend your system’s lifespan significantly.
Emergency Alarm Repairs & Fault Callouts
Securex provides 24/7 emergency support for intruder alarm faults in London. Whether your siren won’t stop ringing at 2am, your panel is showing error codes or you’re experiencing repeated false alarms, we’re here to help.
Our emergency response:
Same-day attendance in most London boroughs for critical issues
Out-of-hours engineer rota covering nights, weekends and bank holidays
Aim to restore full protection on the first visit wherever possible
Common spares carried on our vans—panel batteries, PIRs, door contacts, keypads and bellbox components
Typical emergency scenarios we handle:
Constant ringing external sirens causing neighbour complaints
Panel faults leaving your property unprotected
Repeated false alarms risking your URN status with police
Damaged sensors after attempted break-in or accidental impact
Communication failures preventing signals reaching your ARC
We understand that a faulty alarm is more than an inconvenience—it’s a safety concern. Our engineers prioritise getting your system back online quickly while ensuring the repair is done properly.
App‑Controlled, Smart & Integrated Intruder Alarms
Securex installs modern intruder alarms with smartphone apps, allowing you to arm and disarm your system, view event logs and receive push notifications from anywhere in the world. This level of control is particularly valuable for busy London lifestyles.
Who benefits most from smart alarm features:
London professionals who travel frequently for work
Landlords managing multiple rental properties across the city
Business owners overseeing several commercial sites
Families who want visibility of when children arrive home
Key smart features available:
Remote arming and disarming via iOS or Android app
Real-time push notifications when sensors are triggered
Event history showing all system activity
Geofencing reminders when you leave home without setting the alarm
Separate partitions for different areas (e.g., home/office or warehouse/showroom)
User management with individual codes for family members or staff
These systems integrate seamlessly with CCTV, video doorbells, access control and smart locks, providing a single, joined-up home security or business security solution controlled from one interface.
Integration with CCTV & Access Control
Securex can link intruder alarms to CCTV systems so that when an alarm is triggered, cameras automatically create bookmarked recordings and users receive both alarm and video alerts simultaneously. This integration dramatically improves verification and gives you visual confirmation of what caused the activation.
Practical integration scenarios:
A retail unit in Camden where a door contact triggers both an alarm event and a snapshot from the front-of-house camera
An office building where access control records who entered before an alarm was set
A warehouse where perimeter sensors trigger floodlights and PTZ camera tracking
Multi-tenant buildings where each unit has independent alarm zones linked to shared CCTV
We design systems for small shops, offices and multi-tenant buildings where intruder alarms, access control and door entry must work together without complexity. All integrations are configured with data protection and privacy in mind, particularly for workplaces subject to UK GDPR requirements.
The result is maximum protection with minimal hassle—everything works together, controlled through unified apps and monitored by a single professional service provider.
Police Response, NSI Accreditation & Insurance Compliance
Securex is an NSI-certified security company, meeting the standards required for police-monitored intruder alarms in the UK. This accreditation matters because it determines whether police will respond to your alarm activations and whether your insurance policy will recognise your system as compliant.
How police response works:
Your alarm signal is triggered by motion sensors, door contacts or other detection devices
The signal reaches your alarm receiving centre within seconds
The ARC follows verification procedures (audio, video or sequential sensor confirmation)
If criteria are met, police are contacted using the URN assigned to your site
Police dispatch is prioritised as a verified alarm rather than a potential false alarm
Insurance compliance considerations:
Many insurers require professionally installed and maintained systems for contents over certain values
Systems may need to meet EN50131 Grade 2 or Grade 3 depending on risk level
Annual or twice-yearly servicing is often a policy condition
Documentation including installation certificates and service records may be requested for claims
We design systems in line with insurers’ requirements for London properties, including setting patterns, grading specifications and maintenance schedules. We recommend speaking to your insurer before installation to confirm any specific conditions—this avoids surprises when you need to make a claim.
DIY vs Professional Intruder Alarm Service
The rise of smart home technology has brought numerous DIY security alarm options to market. While these products have their place, understanding the differences helps you make an informed decision about what’s right for your property.
Typical DIY alarm limitations:
Shorter product lifecycles—manufacturers may discontinue support within 3–5 years
Limited technical support when things go wrong
Potential connectivity issues in dense London housing with thick walls
No route to police response via ARC—self-monitoring only
Installation quality varies—incorrect sensor placement reduces effectiveness
May not satisfy insurers for valuable contents or commercial use
Advantages of professional alarm installation from Securex:
Systems designed specifically for your property’s layout and risk profile
Stable signalling paths using dual-path IP/GPRS for reliable ARC communication
Robust encryption protecting your system from digital interference
Documented maintenance with certificates for insurance compliance
Proper commissioning ensuring all sensors work correctly from day one
Ongoing support from security experts who know your system
A professional burglar alarm installer ensures your system is worth installing for the long term—not just a temporary gadget that might let you down when it matters most. The difference in reliability and support typically outweighs the initial cost savings of DIY alternatives.
Why Choose Securex for Intruder Alarm Service Near You?
Securex has been protecting London properties since 2010, building a reputation for high quality service, reliable response times and genuine expertise across residential and commercial security.
What sets us apart:
London-focused coverage – We know the city’s properties, from period conversions to modern developments, and can respond quickly across all boroughs
NSI accreditation – Meeting the highest standards for alarm installation and maintenance, enabling police response where required
24/7 emergency support – Real engineers on call around the clock, not just a call centre reading from a script
Experienced, vetted engineers – Time-served professionals who take pride in their work
Integrated capabilities – Intruder alarms, CCTV, fire safety, access control and electrical services under one provider
Clients we support:
Homeowners seeking reliable house alarm protection
Landlords managing single properties or portfolios
Retail and hospitality businesses
Offices and commercial premises
Schools, healthcare facilities and warehouses
Facilities managers responsible for multiple London sites
Having intruder alarms, CCTV, fire alarms and electrical works under one provider simplifies maintenance and compliance. One point of contact, one relationship, one company accountable for your protection.
Typical Costs & Quote Information
Understanding costs helps you budget effectively. Here are realistic example ranges for London installations:
Residential systems:
Basic bells-only home alarm for small flats: from around £450–£700 + VAT
Wireless Grade 2 system for 3-bed homes: from around £650–£1,100 + VAT
Monitored systems with ARC connection: quoted individually after survey
Commercial systems:
Small retail units and offices: from around £800–£1,500 + VAT
Larger premises, warehouses and multi-zone installations: quoted individually after survey
What’s included in our quotes:
Itemised breakdown showing equipment, labour and optional extras separately
Clear explanation of any ongoing monitoring costs
No hidden charges or surprise fees
Free quotes without obligation
For larger commercial installations, staged payments may be available. Standard terms are typically a deposit to confirm booking with the balance due on completion.
We encourage you to view costs alongside value: insurance compliance, reduced risk of break-in, professional installation and 24/7 support all contribute to genuine protection rather than false security.
Book Your Intruder Alarm Service Near You Today
Whether you need a new burglar alarm installation, annual servicing for your existing system or emergency repairs to stop a faulty siren, Securex is ready to help.
Getting started is simple:
Call our London office during standard business hours (08:30–17:30, Monday–Friday) to speak with our team
Complete our online form for a callback at a time that suits you
Request a free site survey with no obligation—we’ll assess your property and provide clear recommendations
Our office team handles enquiries during business hours, with engineers on 24/7 emergency rota for urgent faults outside these times.
We cover all London postcodes:
N, E, SE, SW, W, NW, EC, WC and surrounding areas—from Croydon to Enfield, Bromley to Harrow.
Whether you’re protecting a family house in Ealing or securing a warehouse in Stratford, we provide clear understanding of your options with no hard sell. Our focus is on finding the right intruder alarm solution for your risk level and budget, installed and maintained to the highest standards.
Contact Securex today and take the first step toward reliable, insurance-compliant protection for your London property.
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