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Construction Site Alarms

Clearway installs construction site alarms that detect intrusions and alert monitoring centres to prevent theft and vandalism.

The first line of any security system is to deter potential threats and intruder activity – but when this fails, Clearway construction site alarms are responsive and intuitive, detecting intrusions and breaches and alerting the appropriate personnel.

Our building site alarm systems, engineered specifically for construction sites, offer huge peace of mind, especially if you’ve experienced intrusions or thefts and need the assurance that any future suspicious activity will result in a rapid alarm signal to deter thieves.

Download Our Construction Site Services Brochure

Rapidly Deployable, Reliable Alarms for Construction Sites

Construction site alarms are security systems designed to detect unauthorised access and alert monitoring centres to prevent theft and vandalism.

Installing highly responsive construction site alarms showcases that you’re serious about protecting your equipment, site and people – and advancements in wireless and remote security make it faster and easier to introduce tough controls and deterrents when you need them most.

From temporary alarm systems to perimeter protection, high-mounted CCTV masts to AI-enabled CCTV that can automatically detect anything outside the norm, our vast range of solutions is always adapted to your risk assessments, budgets and priorities.

Clearway’s alarm systems adhere to the highest standards, which not only means you’ll be able to stamp out the worry of another break-in, but that you’ll be in full compliance with every applicable regulation, health and safety law and insurance coverage condition.

Key Benefits of Construction Site Alarms

  • Early detection of break-ins or fire risks
  • Full compliance with safety regulations
  • Remote access to visual verification feeds
  • Professional monitoring 24/7
  • Suited to active and unmanned sites
  • Tailored to your site conditions
  • Rapid protection against all threats

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Need to upgrade your construction site fire alarms asap?

If your site is at risk of a fire, we can help you install fire alarms quickly.

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Our Construction Site Alarm Services

We secure numerous construction sites in the UK, offering diverse forms of construction site security to keep projects on track.

They include CCTV towers as a robust solution for monitoring large construction sites, providing 360-degree coverage and real-time surveillance. 

Site access control systems ensure that only authorised personnel gain entry, enhancing security and reducing risk, while site CCTV installations deliver continuous, high-definition monitoring, allowing for quick responses to incidents and maintaining safety across your project.

Visually Verified Site Alarms

The Clearway inView Visually Verified System is a battery-powered internal or external alarm system that captures a series of still images of the cause of the activation, collates them into a ten-second clip and sends it, via the mobile network, to a predetermined recipient or our NSI Gold Cat II monitoring station (ARC).

Video verification is most commonly used to provide notification of different activation types, such as human entry or wildlife. This is particularly useful where false alarms are common and allows the monitoring service to determine the appropriate action to be taken and/or the security service or police to be deployed.

Many construction sites require temporary alarms – for a variety of reasons:

  • Extra security during high-value material movements or crucial projects.
  • Protection during increased times of risk or security threats.
  • Precautions while permanent surveillance installations are completed.
  • Fast response in the event of an emergency

Clearway offers temporary construction site alarms to ensure your premises and sites are secure for as long as you need.

Visually Verified Alarms

Construction Site Fire Alarms

Construction sites can be a hotbed of flammable materials. Scaffolding, roof coverings and timber constructions can fuel the flames should a fire break out on site.

It’s not enough to rely on a fire extinguisher in the event of an alarm as your sole fire safety measure. Intelligent fire alarm systems installed by qualified fire engineers can detect fire and smoke and notify your alarm response team immediately.

Clearway’s construction site fire alarms, an integral component of our extensive fire systems offering, address the full spectrum of fire safety needs for construction sites.

From conventional fire systems tailored for commercial buildings to advanced voice evacuation and public address solutions designed for public access areas, Clearway offers a comprehensive range. Get a Clearway fire safety risk assessment today.

Construction Site Fire Alarms

Motion Detection Alarms With inView Detect

Clearway’s inView Detect is an ideal choice for protecting your construction site, functioning seamlessly as a motion-detected perimeter alarm system (PIDS).

With its easy deployment and user-friendly interface, inView Detect offers 360° coverage, allowing effective monitoring and protection should movement be detected.

When activated, an alert is transmitted and verified quickly via the integrated AI system, with a series of images sent to our NSI Gold Cat II Alarm Receiving Centre (ARC) to ascertain the cause of the alert.

Deter construction site thefts with a powerful 120db audible siren and flashing blue LED strobes for visual alerts.

PIDS Systems

24/7 Construction Site Alarm Monitoring

Our NSI Gold certification ensures that Clearway’s construction site alarm monitoring services adhere to the highest industry standards, offering the utmost reliability and effectiveness.

For construction sites, where security is paramount, the NSI Gold Monitoring offers a level of assurance and trustworthiness crucial for the safety of assets and personnel. Our trained alarm responders provide swift and accurate responses to alarm activations, minimising the risk of false alarms and ensuring that genuine threats are addressed promptly.

Construction Site Monitoring

Construction Site Alarm System Maintenance

Clearway’s construction site alarm maintenance services are a vital component of our commitment to comprehensive safety solutions. Our tailored approach recognises the unique challenges of construction environments, ensuring that alarms remain in optimal condition to meet the stringent safety requirements of these sites.

Our qualified technicians conduct routine inspections and proactive maintenance, addressing potential issues before they escalate. This meticulous approach not only enhances the reliability of your alarms but also ensures that construction sites are well-prepared to respond swiftly and effectively in case of an emergency. Read more about our alarm maintenance services or fire alarm servicing here.

construction site security services for a housing development

Who Do We Work With?

Clearway helps construction companies, developers, project managers and contractors safeguard their building sites against intrusions, fire, theft, vandalism and safety hazards with advanced alarm solutions.

rising cost of construction

Contractors & Principal Developers

Contractors & Principal Developers

Implementing site-wide alarm coverage throughout the specific stages of each project and adjusting sensor and alarm positioning according to live zones of work.

securing a compound

Housebuilders

Housebuilders

Fitting alarms with ongoing coverage over individual plots where housebuilding projects are underway, around the perimeters surrounding development compounds, or installing wireless alarms for show homes.

Utilities & Infrastructure Projects

Utilities & Infrastructure Projects

Short-term and flexible alarm coverage for sites in isolated regions without mains power, or for roadside utility installation and maintenance works where personnel, equipment and vehicles need 24/7 protection.

ANPR solution for distribution

Plant & Equipment Hire Companies


Plant & Equipment Hire Companies

Advanced alarm systems positioned within depots, warehouses and storage areas, and around higher-value plant, prevent intrusion attempts from going undetected and deter thieves from targeting construction cabins or offices.

construction site alarm systems

Site Managers with Limited Budgets

Site Managers with Limited Budgets

Cost-effective alarm systems that are ideally suited to construction teams or projects with budgetary constraints, but who need a fast and reliable alternative to around-the-clock security guards.

energy security

Clients with Existing CCTV

Clients with Existing CCTV

Reinforcing current CCTV surveillance systems with fully integrated alarms that can activate CCTV cameras to determine when alerts are false or genuine.

ANPR solution for distribution

Insurance or Compliance-Driven Projects


Insurance or Compliance-Driven Projects

Insurance and regulation-compliant alarms, verification systems and integrations to validate construction site insurance coverage and ensure sites are audit-ready at all times.

High Risk Projects

Key Features

    Key Features of Construction Site Alarms

    temporary alarms

    Features designed to give you peace of mind.

    Detect Fires and Break-in Attempts Immediately, Day and Night

    Continually vigilant alarm systems act as an early fire detection safeguard, ensuring any early signs of fire are tackled before they cause damage.

    Gather Reporting About the Movements or Issues That Have Triggered Every Alert

    Visual verifications enable site managers to check live feeds through their cameras to see exactly why an alarm has been activated – and whether a response is required.

    Trust That Your Materials, Equipment and ProgresIntroduce 24/7 Monitoring and Surveillance Even for Unmanned Sitess Won’t Be Compromised

    Construction sites that are closed overnight or for weekends and holidays, or where work hasn’t yet begun, can be fully protected with wireless and solar-powered systems.

    Tailor Your Alarms to Your Site Conditions and Risks

    We recommend and integrate construction site alarms based around your site, with ongoing updates or reconfigurations depending on build phases, evolving risk profiles and variable site layouts.

    Integrate Safety-Compliant Alarms on Short Notice

    When safety or sector-specific regulations aren’t being met and immediate action is required, we can advise on the right alarms to ensure full compliance as quickly as possible.

    Speak To Us About How We can Help Your Site

    How Construction Site Alarms Work in Practice

    Clearway Apprenticeships

    Here’s what to expect from the process. From the moment you call us to the continued relationship after your site is secured.

    Talk To Us About Our Process For Your Site

    How Construction Site Alarms Work in Practice

    From Call to Hire, getting your site secured is straightforward

    1. Flag Unusual, Suspicious or Prohibited Activity

    Motion detected overnight, an unknown vehicle approaching, or covert activity around your perimeters can all trigger a preventative alert from AI-enabled systems and perimeter alarms.

    2. Track Movement Patterns

    Intelligent construction site alarms can be programmed to any parameters, which means that anything outside of the norm, or that could potentially be a security threat, activates an alert for investigation.

    3. Raise Immediate Alarms

    Any confirmed break-in, trespass or other criminal activity will be detected by your alarm systems, which instantly circulate notifications to security responders, our ARC teams or your on-site guards.

    4. Record Data and Logs for De-escalation and Prosecution

    Video verified alarms collate information, which can be used to investigate the underlying causes behind a safety or security event, or to record the perpetrators to enable onward police action.

    Our construction site alarm process

    Construction site access control from Clearway

    Here’s what to expect once your site is secured.

    Start Site Security Journey

    Our construction site alarm procees

    1. Conduct a Thorough Risk Assessment

    Every construction site will have different threats, which is why a professional risk appraisal helps us to see whether your biggest vulnerabilities lie in exposure to fire risks or in break-ins via unsupervised rear entry routes.

    2. Consider Insurance and Regulatory Requirements

    It’s essential that construction sites adhere to all the relevant regulations and insurance coverage conditions, and we can advise on these to ensure you are covered at all times.

    3. Receive Independent Advice From Clearway

    Our construction security specialists offer personalised guidance, based on your concerns, budgets, timeframes and any priorities in terms of keeping your construction site running smoothly.

    4. Deploy Construction Site Alarms and Monitoring Services

    When you are ready to proceed, we react quickly, assigning our nationwide teams to install wireless alarms, monitoring solutions, perimeter alarms and other services.

    Key Problems to Address With Construction Site Alarms


    We know that any unauthorised intrusions or break-ins can cause a substantial delay in productivity, as well as time and costs required to replace stolen equipment or repair damage.

    We also understand that fire safety on construction sites is paramount. Investing in building alarms will not only significantly reduce these threats, they also give site managers and staff the peace of mind that the site is fully protected.

    You Have CCTV or Other Security, But Want an Added Line of Defence, Should a Security Breach Happen

    You’re responsible for a construction site that already has some element of security, but you need a backup system that will ensure there is no potential for an intruder to reach storage bays, high-value equipment or materials without your security teams being notified.

    You Need to Eliminate False Alarms Causing Disruption and Complaints

    There have been multiple false callouts due to issues like wildlife or heavy winds, and you need to ensure this doesn’t keep happening, especially where audible alarms are impacting the peace of local businesses or residents, or you’re managing spiralling costs to attend these callouts.

    You’re Worried About Nobody Responding to an Intrusion or Have Little Confidence in Your Current Alarms or Monitoring Systems

    You have conventional alarms, but that only emit a sound or beacon, with a strong chance that this will be ignored or dismissed as false, even during a live break-in. You might also have alarms with some sort of monitoring service, but have found this to be unfit for purpose.

    You’re Concerned About High Fire Risks Linked to Flammable Materials, or Temporary Electronics

    Your construction site may have ongoing fire safety risks or temporary concerns, or you’ve discovered during your latest fire risk assessment that your profile has worsened, and you need a rapid way to ensure you’re compliant with fire safety rules.

    You’ve Had a Recent Break-in, Trespassing Incident or Threat and Need an Alarm System Urgently

    There has been a theft, vandalism or break-in, and you need to act quickly to deter future attacks or protect your site during periods of elevated risk, such as when accepting deliveries of higher-value raw materials or when there are expected civil unrest incidents nearby.

    Your Insurer Has Instructed You To Install Video Verified or Monitored Alarms to Maintain Cover

    Your insurer has stated that your existing alarms or monitoring are not within their terms of cover, and you need to update your alarms to include either video verification to ensure all alerts are investigated promptly, or a 24/7 monitoring service to capture and address all potential incidents.

    You’re Managing a Remote or Unmanned Project With No Power Source to Implement Robust Security

    Your site is in a location where there is no connection to any source of mains power, or where the site is likely to be vacant for a period of time, and you need a way to monitor and protect the development either until power infrastructure is in place, or until work begins.

    You Need Temporary Alarm Solutions While Guards Are Off-Duty or While Waiting for Permanent Alarms or Cameras to Be Installed

    You must have a way to install construction alarms as additional protection when guards are not present, when a pending permanent camera is not yet available, or while changing site layouts during live projects and testing or servicing other alarm systems to ensure there are no gaps in your security.

    You Need to Secure Your Site Perimeter, Especially Overnight, Knowing Instantly When Motion Is Detected

    There are increasing concerns about the potential for break-ins overnight, at weekends, or during upcoming holiday periods. You don’t just need alarms around your storage bays, but around the entirety of your construction site boundary, where intrusions are more likely.

    You’re Unsure Whether Your Current Alarms Are Compliant or Are Under Pressure Following a CDM Audit Failure

    You have concerns about whether you’re meeting the Construction Design and Management (CDM) rules or have undergone an audit that found failings in your safety systems – and need to react quickly to ensure you’re adhering to all regulations and insurance requirements.

    Let Us Fix Your Security Problems
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    What Our Clients Say

    Fisher German LLP

    July 2025

    Great Service and Rapid Response

    I have been using Clearway for over 5 years. One of the standout features of Clearway is their rapid response time.

    Axis Europe

    July 2025

    Can’t Commend Them Enough

    The guys were very polite, friendly and professional in their whole attitude. They worked very hard & did a great job!- Can’t commend them enough!

    John Fisher S&C Slatter

    July 2025

    Huge Thanks

    A huge amount of thanks goes to ‘Clearway’ for their exemplary conduct and unwavering commitment to the safety of my site management, site operatives and construction site.

    Learn More About Protecting Your Site

    Watch our video below to learn more about how we can protect your site.

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    24/7 Live Monitoring of CCTV and Alarm Signals

    We offer continuous monitoring and response services across your construction site, including options to install multi-site or zoned alarms and integrated cameras you can access from a single dashboard or system for always-on oversight.

    AI-Driven Intruder and Abandoned Object Detection

    Alarms integrated with CCTV cameras and with video verification technology can detect abandoned objects or items that should not be on site, such as an intruding vehicle, and automatically identify unusual events that require investigation.

    Remote and Immediate Notifications

    Intelligent construction site cameras and systems combine security, fire prevention and health and safety controls, delivering actionable insights that construction managers can use to manage site security and efficiency, with instant updates sent to your preferred device.

    Fully Weatherproof, Long-Lasting Battery and Solar Powered Alarms

    Our construction site alarms are tested to the highest standards for weather-resistance, as durable hardware systems that work in any outdoor environment. Solar and battery alarms are entirely wireless and can be installed and activated in minimal time with no reliance on mains power.

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    Why Choose Clearway for Site Security?

    With over 40 years in the security industry, our construction site alarms are specifically designed and developed to meet the security needs of construction environments.

    Trusted by Major Housebuilders, Local Authorities and Developers

    Over the years, we have worked with construction businesses of every size, from large-scale infrastructure projects that require multi-layered and next-gen alarm systems and responses, to individual housebuilding projects that need a way to install quick, 100% reliable alarms around entrances and loading bays.

    Fast, Compliant Installation

    Clearway’s construction specialists recognise the pressures construction site managers and supervisors are under, and we offer independent and personalised advice, from the fire detection equipment you require to safeguard flammable substances to the best ways to protect your contractors and personnel.

    Around-the-Clock Alarm Monitoring

    Our alarm responders are highly trained and watch over your alarm systems and CCTV integrations 365 days a year, ensuring every alert is investigated, logged, and the appropriate response is deployed, whether alerting security teams, site owners, or the police.

    Comprehensive Fire and Security Alarms

    We ensure every construction site is protected from all manner of threats, blending proactive fire and smoke detection systems, sensitive and automated perimeter alarms, and integrated security solutions that transmit alerts when anything requires investigation, whatever the trigger.

    Detect Perimeter intrusion detection PID

    Who We Work With

    Clearway supports diverse sectors requiring rapid security deployment. Our clients include construction companies, property developers, event organisers, and facility managers who need reliable surveillance solutions. We’re trusted by:

    NHS

    Download our Construction Site Services brochure

    Download the brochure

    What Do Our Security Experts Say?

    Our UK Sales Director, Kelvin Danton, explains why building site security is so important.

    Construction site CCTV is fundamental, but its effectiveness depends on the specific risks and threats you need to manage. Done well, a set of hyper-efficient cameras is a crucial resource to protect against all threats – whether security, environmental or health and safety related.

    Kelvin Danton

    UK Sales Director

    A Successful Project

    The client was starting a new project in Sheffield city centre, near buildings, shops, and several active construction sites. The project was situated around a live building, requiring careful consideration of resident safety and security measures.

    Traditional 24/7 CCTV systems were not ideal due to privacy concerns, and the limited space ruled out the use of large self-sustained Solar CCTV towers.

    The client approached Clearway to provide a more effective and less labour-intensive solution to the problem.

    Read Full Case Study

    Sheffield

    Sheffield city centre

    View all case studies

    Learn More About Securing your site

    Explore our comprehensive guides covering site security.

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    Frequently Asked Questions

    Got a question about our site security? Read our frequently asked questions.

    What’s the difference between a PID alarm and a standard motion sensor on a construction site?

    A PID perimeter alarm system uses passive-infrared sensors that detect heat signatures and movement, which means they can pick up on covert activities such as a person crawling over ground – something a conventional motion sensor may not be sensitive enough to detect.

    In addition, PIR systems are more advanced, integrating with other security assets to differentiate between heat signatures attributed to animals and people.

    Do visual verification alarms help reduce false callouts to police or site managers on construction projects?

    Yes! Visual verification alarms work by capturing a quick series of images or a burst of footage whenever the alarm sensors are triggered. That means the alert not only notifies you and our monitoring teams that an alarm has been activated but also shows you the cause.

    If, for instance, it is obvious that a fox or badger has activated the alarm, this can be logged as false or stood down. However, if the system detects an intruder, we can react quickly to notify the police or on-site patrols.

    How often should construction site alarms be tested or serviced during a live project?

    Testing and configuring alarms is an important aspect, as it eliminates the risk that a long-standing security system has a fault or has been tampered with. The regulations state, as a rough guide, that site managers should conduct weekly visual inspections, with monthly functional tests and at least annual professional maintenance.

    However, this could vary considerably depending on the nature of your alarms and security systems, the risk levels you’re dealing with, and whether you have temporary alarms or long-term installations.

    Can I monitor multiple construction sites from a single dashboard or system?

    Clearway’s NSI Gold Monitoring ensures a prompt and accurate response to alarm activations across one or several sites. Our quick response times are critical in mitigating potential threats and minimising the impact of security incidents on your construction site, or over multi-site projects, with all notifications and alerts sent to you in one user-friendly interface or to your chosen device.

    Related services

    Clearway’s inView CCTV Tower is the perfect standalone solution where CCTV security and remote monitoring are required.

    Clearway construction security services

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    Construction Site Security Guards

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