You’ve been burgled. The immediate crisis is handled—police notified, damage temporarily repaired, claim started. Now comes the question: what do you actually change to prevent this happening again?
This guide helps you prioritise security upgrades that address real vulnerabilities, not just anxiety. For immediate post-incident steps, see what to do after a break-in.
Understanding What Happened
Why Entry Method Matters
The most effective upgrade addresses exactly how entry occurred.
| Entry Method | Priority Upgrade | Secondary Upgrades |
|---|---|---|
| Lock snapping | Anti-snap cylinder | Defender handle |
| Door kicked in | Strike plate reinforcement + longer screws | Door replacement if damaged |
| Window forced | Window locks + reinforced glass | Alarm sensors |
| Lock picked | Higher-security cylinder | Anti-pick features |
| Key used (stolen) | Complete lock change | Consider key control |
| Through unsecured entry | Secure the entry point | Review all access points |
Getting the Information
How to understand what happened:
- Police report: May include entry method observations
- Locksmith/repair assessment: Professional can identify attack method
- Physical evidence: Damage patterns indicate techniques used
- Your observations: Before cleanup, note exactly what was damaged
"The burglar has already tested your security and found a weakness. Learn what they learned—then close that gap.
Priority 1: Close the Exploited Vulnerability
If the Lock Was Attacked
Lock snapping (Euro cylinder):
- Install TS007 3-star anti-snap cylinder
- Consider security handle with cylinder guard
- Check multipoint mechanism still operates correctly
Lock picking/bumping:
- Upgrade to anti-pick, anti-bump cylinder
- Higher-security brands offer better protection
- Consider smart locks with no traditional keyway
Mortice lock defeated:
- Upgrade to BS3621 5-lever mortice
- Check strike plate condition
- Consider supplementary deadlock
If the Door or Frame Failed
Door kicked in:
- Replace strike plate with reinforced version
- Install 75-100mm screws into wall studs
- Consider door jamb armour/reinforcement kit
- If door damaged, replace with security-rated door
Hinge side attacked:
- Install hinge bolts
- Replace with security hinges
- Check for damage affecting door seating
If Windows Were Entry Point
Window forced:
- Install key-operated window locks
- Consider laminated glass
- Add window sensors to alarm system
- Check all similar windows for same vulnerability
Priority 2: Secondary Vulnerabilities
Once the entry point is addressed, consider what else was exposed.
Revealed Weaknesses
The incident may have shown:
- Other unlocked or weak points they could have used
- Interior vulnerabilities (safe location, valuables visible)
- Response time issues (how long until you/neighbours noticed)
- Alarm limitations (if you had one, why didn’t it help?)
Common Secondary Upgrades
| Upgrade | Purpose | When to Prioritise |
|---|---|---|
| Additional window locks | Multiple entry points | If ground floor windows lack security |
| Alarm system | Detection and deterrence | If no alarm, or existing alarm was ineffective |
| Security lighting | Visibility and deterrence | If approach was dark/hidden |
| Timer switches | Occupancy appearance | If home appeared empty—see holiday security |
| CCTV | Evidence and deterrence | If identification/evidence would help |
Priority 3: Visible Deterrence
Why Visibility Matters
Burglars assess properties before committing. Visible security signals that your property is:
- Not an easy target
- Different from before (previous methods won’t work)
- Likely to involve risk or capture
High-Visibility Improvements
| Improvement | Visibility | Deterrent Effect |
|---|---|---|
| Security door (visibly robust) | Very high | Strong |
| Window bars/grilles | Very high | Strong (some dislike aesthetics) |
| Alarm bell box | High | Moderate to strong |
| Security camera | High | Moderate (depends on type) |
| Security lighting | Medium | Moderate |
| Stickers and signage | Medium | Low to moderate |
The Psychology of Deterrence
Security systems work partly because they’re visible:
- A burglar doesn’t know if the alarm is monitored or fake
- They don’t know if the camera is recording
- They see evidence you care about security
The goal isn’t to be impenetrable—it’s to look harder than the next property.
The “If Keys Were Taken” Problem
Immediate Action Required
If keys were stolen during the burglary:
- Change all locks those keys might fit (not just front door security)
- Consider internal doors if keys included those
- Garage, shed, and vehicle locks if relevant
Key Security Going Forward
Reduce future key-loss risk:
- Fewer keys in circulation
- No identifying information on keys
- No “spare key” hidden outside
- Consider restricted/patented key systems
What About Alarms?
When Alarms Help
Alarms are most effective when:
- Monitored (response dispatched on trigger)
- Loud (alerts neighbours, pressures intruder to flee)
- Well-positioned (covers actual entry points)
- Regularly tested and maintained
When Alarms Don’t Help
Alarms failed in your burglary if:
- Not set at the time
- Sensors didn’t cover entry point
- Intruder was in and out before response
- No one was available to hear/respond
Upgrade or Add?
If you had an alarm that didn’t work:
- Understand why before upgrading
- Extend coverage if sensors were bypassed
- Consider monitoring if self-monitored failed
- Improve entry delay if too slow
Budget Prioritisation
If Budget Is Limited
Focus spending on:
- The actual entry point (highest priority)
- Other identical vulnerabilities (same type of window, door)
- Detection (know when something happens)
- Visible deterrence (prevent attempt in first place)
Approximate Costs
| Upgrade | Typical Cost |
|---|---|
| Anti-snap cylinder fitted | £80-150 |
| Strike plate reinforcement | £50-100 |
| Window locks (per window) | £25-50 |
| Basic alarm system | £200-800 |
| Security lighting | £50-200 |
| CCTV (basic visible system) | £200-600 |
Insurance May Help
Your insurance may cover:
- Emergency repairs (locks, boarding)
- Improvements if recommended by police/assessor
- Sometimes additional security upgrades
Check your policy and ask your claims handler. For claims guidance, see insurance burglary claims.
Timeline for Upgrades
Immediate (1-3 days)
- Emergency lock replacement
- Boarding/temporary repairs
- Replace any stolen keys’ locks
Short-term (1-2 weeks)
- Permanent lock/door replacement
- Address main vulnerability
- Consider alarm if not present
Medium-term (1-3 months)
- Secondary improvements
- CCTV if wanted
- Comprehensive security review
- Neighbourhood watch involvement
"Don’t try to do everything in a panic. The immediate vulnerability needs addressing fast. The rest can be thoughtful, planned, and done properly.
Rebuilding Confidence
The Psychological Reality
Physical improvements help, but burglary affects people differently:
- Some feel better as soon as security is upgraded
- Others remain anxious regardless of improvements
- The violation of personal space takes time to process
What Helps
Practical actions:
- Comprehensive security improvements
- Routine checks before bed
- Knowing your security is genuinely better
Psychological recovery:
- Time (it does get easier)
- Talking to others who’ve experienced burglary
- Professional support if anxiety persists
When Improvements Feel Insufficient
If upgraded security doesn’t help you feel safe:
- This is normal and doesn’t mean you’ve failed
- The feeling typically improves with time
- Professional counselling can help some people
- You’re not overreacting by being affected
Frequently Asked Questions
Should I upgrade security immediately after a break-in?
Complete emergency repairs first (boarding, emergency locks), but don't rush major upgrades. Take a few days to assess how entry occurred and what would have prevented it. Informed upgrades are better than panic purchases.
Will upgrading locks prevent the same burglar returning?
Burglars do sometimes return (they know the layout and that you'll have new items). Visible security upgrades signal that easy re-entry isn't possible. Different locks also mean any copied keys are useless.
What if I can't afford comprehensive upgrades right now?
Prioritise based on how entry occurred. If the lock was snapped, upgrade the cylinder first. If the door was kicked, reinforce the strike plate. Address the actual vulnerability before general improvements.
Should I get a security assessment after a break-in?
Many locksmiths and security companies offer assessments. A professional eye may spot vulnerabilities you'd miss. Some police forces also offer crime prevention visits.
Will better security help me feel safe at home again?
Physical improvements do help many people feel safer. However, the psychological impact of burglary can persist. Combining practical security with time, and professional support if needed, gives the best recovery.
Should I change all my locks after a break-in?
If keys were stolen, yes—for all doors those keys might fit. If no keys were taken and entry wasn't through a lock, changing locks is optional but often provides peace of mind.
How do I find out exactly how the burglar got in?
The police report may include entry method observations. Your locksmith or repair professional can often identify attack methods from damage patterns. Understanding entry method is crucial for targeted upgrades.
Can I claim security upgrades on my insurance after a break-in?
Check your policy—some cover improvements recommended by police or security assessors. Emergency repairs are typically covered. Major upgrades beyond like-for-like may require you to pay the difference.
Moving Forward
You can’t undo the burglary, but you can respond effectively:
- Understand exactly how entry occurred
- Address that specific vulnerability first
- Extend protection to similar weak points
- Deter future attempts with visible improvements
- Recover emotionally at whatever pace works for you
The goal isn’t perfect security—that doesn’t exist. The goal is security good enough that your property is no longer an attractive target. With informed upgrades based on what actually happened, you can achieve that. For a comprehensive review, see our home security checklist.