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Trusted Security Solutions for Homes and Businesses
Established in the 1990s, M25 Security Systems has become a trusted provider of comprehensive security solutions for domestic and commercial clients across Hertfordshire. Our SSAIB-registered company specialises in the installation and maintenance of intruder alarms, CCTV systems, and entry control solutions, prioritising minimal disruption during installations. With decades of combined experience, we deliver tailored security strategies that meet insurance requirements and industry standards. Our team of certified technicians provides 24/7 emergency response within a 4-hour guarantee, ensuring continuous protection for our clients' properties. We maintain full compliance with current security standards including PD6662:2010 and BS 8243, offering both monitored and non-monitored alarm systems.

Our preventative maintenance schedules ensure optimal system performance, with service intervals determined by system grade and notification type. Client testimonials consistently highlight our prompt service delivery, professional installation, and exceptional after-sales support. We offer free, no-obligation risk assessments and quotations, with transparent pricing structures and no hidden fees. Our local expertise serves areas including Croxley Green, Watford, and St Albans, supporting both new installations and system upgrades. Through continuous investment in staff training and technology, we maintain our position as a leading security solutions provider in the region.
Services
Intruder Alarms CCTV Systems Entry Systems Maintenance 24/7 Monitoring Risk Assessments System Upgrades Alarm Installation
Highlights and features
  • We offer 25+ years of specialist security experience
  • Our team are SSAIB-registered professionals
  • We provide 24/7 emergency response within 4 hours
  • We offer free, no-obligation risk assessments
  • Our installations meet current PD6662:2010 standards
Associations and certifications
  • SSAIB
What people say
Prompt response Clean and tidy work Fair price Excellent service Highly recommended
Services
Intruder Alarms
We install advanced intruder alarm systems meeting PD6662:2010 standards. Options include monitored systems with Alarm Receiving Centre connectivity and bells-only systems with speech diallers. Our installations feature concealed wiring for new builds and minimal disruption for existing properties, with both domestic and commercial applications.
CCTV Systems
Our CCTV solutions range from single-camera installations to multi-camera systems with top-tier recording equipment. We provide both domestic and commercial installations with flexible camera placement and discreet wiring solutions. Systems can be integrated with existing security infrastructure for comprehensive protection.
Entry Systems
We supply and install entry systems featuring keypad access, proximity readers, and integrated alarm systems. Solutions include audible/video intercoms and card/tag access systems tailored to both residential and business requirements with seamless integration to existing security setups.
Maintenance
Our maintenance contracts include annual/bi-annual visits depending on system grade. Services cover battery testing, control panel checks, sensor verification, and alarm signal testing to BS 8243 standards. Emergency call-outs are available 24/7 with 4-hour response guarantees.
Risk Assessments
We provide free, comprehensive risk assessments identifying vulnerabilities in your property's security. Our experts evaluate existing systems, recommend appropriate security grades, and create tailored protection plans with no obligation for further work.
Questions
What security systems do you install?
We install intruder alarms, CCTV systems, and entry control solutions for both domestic and commercial properties.
Are your installers certified?
Yes, we are SSAIB-registered with fully certified technicians meeting all current industry standards.
Do you offer maintenance contracts?
Yes, we provide scheduled maintenance with 24/7 emergency response within 4 hours for all systems.
Can you upgrade existing systems?
Yes, we offer system upgrades and transfers from other providers with minimal disruption.
Do you provide free assessments?
Yes, we offer free, no-obligation risk assessments and quotations for all security requirements.