Commercial property insurance protects significant investments. But that protection often comes with conditions—including specific requirements for physical security.
Fail to meet these requirements and you may find your insurance worthless precisely when you need it. See our complete insurance and locks guide for residential requirements. This guide explains what commercial insurers typically expect and how to ensure compliance.
Most commercial property insurance requires BS3621 certified deadlocks on all final exit doors. Additional requirements may include TS007 cylinders, access control, or alarm integration depending on property type and risk level. Check your policy schedule for specific requirements and maintain documentation proving compliance.
Why Insurance Cares About Your Locks
Risk Assessment Fundamentals
Insurance is about risk. Poor security means higher break-in probability means higher claims probability. Insurers manage this by:
- Requiring security standards as coverage conditions
- Adjusting premiums based on security level
- Applying excesses or exclusions for non-compliance
- Refusing claims where conditions weren’t met
The Commercial Difference
Commercial properties face different risks than residential:
| Factor | Commercial Impact |
|---|---|
| Higher-value contents | Greater potential loss |
| Business equipment | Specifically targeted items |
| Extended unoccupied periods | Nights/weekends vulnerability |
| Multiple tenants | Complex access management requiring master key systems |
| Industry-specific risks | Stock, cash, data |
These factors result in stricter security requirements than typical home insurance.
Common Lock Requirements
BS3621: The Commercial Standard
BS3621 is the British Standard for high-security locks, commonly required for commercial properties.
Requirements of BS3621:
- Deadbolt extends minimum 14mm
- 1,000 key differs minimum
- Drill-resistant features
- Anti-pick, anti-saw protections
- 5-lever mechanism minimum
Where typically required:
- All final exit doors
- Main entry points
- Any door accessing insured premises from outside
TS007 Cylinders
For doors with Euro cylinder locks (uPVC, composite, many commercial doors):
TS007 3-star provides comprehensive protection:
- Anti-snap
- Anti-pick
- Anti-bump
- Anti-drill
Many commercial policies now specifically reference TS007 for cylinder-based locks. Learn more about understanding lock grades.
Additional Standards for Higher-Risk Premises
| Premises Type | May Require |
|---|---|
| Jewellers, high-value retail | LPS 1175 SR2+ rated doors/shutters |
| Cash handling | Time-delay locks, specific safe ratings |
| Data centres | Access control, audit trails |
| Pharmaceutical | Restricted access, enhanced monitoring |
Finding Your Requirements
Where to Look
In your policy documentation:
- Policy schedule—lists specific conditions
- Security conditions section—details lock specifications
- General conditions—may reference “reasonable security”
- Endorsements—any specific additions to your policy
Key phrases to look for:
- “Compliant with BS3621”
- “TS007 rated cylinders”
- “Final exit doors”
- “Approved security”
- “Risk improvement requirements”
Interpreting Requirements
| Policy Says | What It Means |
|---|---|
| ”BS3621 lock” | Specific deadlock standard |
| ”5-lever mortice” | 5-lever sash lock or deadlock |
| ”Insurance approved” | Look for LPCB/SBD approval |
| ”Reasonable security” | Minimum appropriate for property type |
When in Doubt
Ask your insurer or broker:
- Specific brand/model recommendations
- Acceptable equivalents to stated standards
- Documentation requirements
- Compliance verification process
Achieving Compliance
Step 1: Audit Current Security
Assess existing locks against policy requirements:
- List all entry points
- Identify current lock types
- Check for certification marks
- Note any gaps or uncertainties
Step 2: Specification Matching
For each non-compliant lock:
| Current State | Required Action |
|---|---|
| No lock | Install compliant lock |
| Sub-standard lock | Replace or upgrade |
| Compliant but old/worn | Consider replacement anyway |
| Uncertain compliance | Professional assessment |
Step 3: Professional Installation
For insurance purposes:
- Use qualified locksmiths (document their credentials)
- Request fitting certificates for each lock
- Keep packaging showing certification marks
- Document everything in writing
Maintaining Compliance
Ongoing Obligations
Compliance isn’t one-time:
Regular checks:
- Locks functioning correctly
- No damage or deterioration
- Still appropriate for current risk level
Change management:
- Document any lock changes through proper key control management
- Maintain same or better specifications
- Inform insurer of significant changes
Common Compliance Failures
| Issue | Risk |
|---|---|
| Replaced lock with lower spec | Non-compliance |
| Damaged lock not repaired | Condition failure |
| New entry point not secured | Gap in protection |
| Moved premises without reassessment | Mismatched requirements |
Claims Implications
If You’re Non-Compliant at Claim Time
Possible outcomes:
- Claim denied entirely
- Claim reduced proportionately
- Higher excess applied
- Specific exclusion invoked
It depends on:
- Relationship between breach and loss
- Entry point used by intruders
- Severity of non-compliance
- Your claims history
Protecting Your Position
- Pre-loss: Maintain compliance, document everything
- At loss: Stick to the facts—report what happened accurately
- During claim: Provide requested documentation
- If disputed: Seek professional advice
Cost Considerations
Compliance Costs
| Item | Typical Cost |
|---|---|
| BS3621 deadlock fitted | £100-180 |
| TS007 3-star cylinder | £60-120 |
| Professional assessment | Often included when work is quoted |
| Compliance documentation | Usually included |
The Business Case
Compare:
- Lock upgrade: £200-500 one-time
- Annual premium increase for non-compliance: Often £100-500
- Denied claim value: Potentially unlimited
Compliance almost always makes financial sense beyond the security benefit.
Taking Action
If you have commercial property insurance:
- Read your policy security conditions section
- Audit your locks against those requirements
- Address any gaps with professional installation
- Document compliance for your records
- Review annually as policy or premises change
Your locks are a condition of your insurance contract. Treating them as optional is treating your insurance coverage as optional. Invest appropriately—your business continuity depends on it.