Construction Site Security
Construction site security for equipment, materials and premises, with SIA-licensed officers and tailored site protection in London and across the UK.
View this pageConstruction security guide
Construction Site Security Checklist
Review boundaries, access, visitors, plant, materials, lighting, patrols and handovers without confusing guarding with the site’s CDM duties.
- Protect the public as well as property
- Make close-down checks repeatable
- Keep security within the site management plan
Construction-site security protects more than equipment. Unauthorised entrants can be exposed to excavations, plant, materials and incomplete structures.
Before work begins
- Identify the site boundary, adjacent uses and public routes.
- Select fencing or hoarding suitable for the site and surroundings.
- Define authorised entrances and delivery points.
- Assess whether the site may attract children or other vulnerable visitors.
- Identify high-risk, high-value and restricted areas.
- Agree security, construction and emergency responsibilities.
- Create access, visitor, key and incident procedures.
HSE’s public-protection guidance explains the need to manage access across defined boundaries and exclude unauthorised people.
During working hours
- Keep gates controlled without obstructing safe movement.
- Verify completed induction or direct visitors to the client’s induction process; arrange an escort where required.
- Separate public and pedestrian routes from plant and deliveries.
- Record authorised access proportionately.
- Escalate damaged fencing, open gates and unsafe public interfaces.
- Coordinate changing work areas with the site team.
- Keep emergency routes available.
End-of-shift close-down
- Check fencing, hoarding, gates and locks.
- Secure or immobilise plant under the site procedure.
- Remove or secure access ladders where required.
- Cover or barrier excavations and pits.
- Store materials so they cannot topple or roll.
- Lock hazardous substances.
- Secure keys and access devices.
- Confirm alarms, cameras and lighting are operating.
- Record defects and hand over unresolved issues.
These checks reflect HSE’s June 2026 reminder to prevent children and other unauthorised people entering construction sites.
Lighting, cameras and patrols
- Light routes used by authorised people and security staff.
- Avoid glare and shadows that conceal hazards.
- Do not rely on lighting as the only control.
- Position cameras for a defined purpose and lawful coverage.
- Give patrol staff current site hazards and prohibited areas.
- Use patrol arrangements that do not create avoidable blind spots.
- Record defects, access anomalies and evidence consistently.
When to review the plan
Review security after a boundary or construction-phase change, major delivery, incident, attempted entry, new neighbouring activity, shutdown period or change in working hours.
Frequently asked questions
Is a security guard enough to make a construction site secure?
No. Security personnel are one layer. The site also needs appropriate boundaries, safe access, plant and material controls, lighting, procedures and management review.
Who is responsible for keeping unauthorised people out?
Relevant CDM duty holders retain responsibility; the principal contractor must take reasonable steps to prevent unauthorised access.
Can security guarantee that theft will not happen?
No. Security measures reduce and manage risk but cannot honestly guarantee that damage, theft or unauthorised entry will never occur.
Should CCTV cover the public pavement?
Coverage should be necessary and proportionate. Organisational CCTV must comply with applicable data-protection requirements.
Build security into the site plan
Tell us about the boundary, operating hours, access points, current construction phase and out-of-hours risks.