Many landlords don’t realise that a few overlooked security details can lead to problems getting claims paid or even void their entire insurance policies altogether. Avoiding costly errors starts with understanding how seemingly minor oversights can jeopardise your entire landlord insurance requirements. Many landlords assume their rental property security is sufficient, but insurers often have strict conditions that must be met. Failing to follow a proper property security checklist, from lock changes to whole access system maintenance, can leave you exposed legally and financially.
When Does Landlord Insurance Get Invalidated?
Most landlord insurance policies come with fine print around property security. These clauses often mandate minimum standards, such as functioning locks that comply with British Standards, restricted personal access and key handling, and well-maintained security systems. Failing to meet these can render your policy invalid.
What does that mean in practice? If a property under your care is burgled and it’s found that a faulty security system or broken door lock contributed to the loss, your insurer may refuse to pay out. Even worse, if a tenant or visitor is harmed due to inadequate security, you could be held legally liable for any resulting damages.
These issues aren’t just hypothetical; they happen all too often. Overlooking a simple lock change or delaying an alarm repair could cost thousands. Worse still, your reputation as a responsible landlord or property manager may suffer, too.
Top Security Mistakes That Put Insurance at Risk
Even well-intentioned landlords can fall foul of their insurance policies by overlooking simple but critical aspects of property security. These errors are often easy to fix but costly to ignore. Insurers expect a basic level of diligence, and failing to meet it, even unintentionally, can lead to unwanted additional stress, costs and work.

Changing Locks
One of the most common and costly oversights landlords make is failing to change locks between tenancies. It might be a cost-saving measure, but it introduces serious risk. If a former tenant or someone they have given a key to can still access the property, your insurance is likely to be invalidated.
Using our lock change service ensures that only authorised individuals have access at all times. Investing in new insurance-approved locks is a small price to pay that can save you a significant headache in the long run.
Skipping Security Inspections
Many landlords assume their property’s existing security setup is “good enough.” Unfortunately, insurers may disagree. A professional security survey can assess vulnerabilities you may not have considered, from dodgy window locks to outdated CCTV systems.
A security survey doesn’t just protect your property; it also provides documented proof that you’ve taken insurance-friendly steps to maintain tenant safety, security and comply with best practices.
Outdated Or Poorly Maintained Property Access Control
Access and security systems are only valuable if they work. If your insurance policy requires access control systems and they fail to function during a break-in or incident, your claim could be denied. We recommend routine checks and prompt maintenance. It may also be worth investing in modern smart access control systems that can alert you to issues in real time and offer remote management features. That way, you’ll never be caught out.
Insecure Access Points
Broken windows, rotting door frames, shared key access, and poorly secured garages are all entry points that criminals can exploit. Worse still, insurers can consider these signs of neglect, giving them grounds to void your policy. The result is home insurance denied!
In addition to general good housekeeping, specific security upgrades, such as reinforced security door frames, grilles and shutters, secure entry systems, and monitored access controls, go a long way in demonstrating due diligence.
Unauthorised Access
Whether it’s a former tenant, a contractor, or even a letting agent with an old copy of the keys, unrecorded and unauthorised access to a home or property is a ticking time bomb. If an incident occurs and it’s found that someone had illegitimate access, the liability can fall squarely on you.
Modern solutions, such as smart locks and remote access control systems, enable you to manage and track who enters and exits your property. They are easy ways to keep insurers happy across a wide range of property portfolios, including those with multiple occupancy homes.
How To Stay Insured
For landlords and property managers, it is relatively straightforward to avoid void insurance and unpaid claims. The secret? Doing more than simply fixing what’s broken. It’s easy to slip into a reactive state. Success, however, comes from being on the front foot. So, here are a few steps we recommend to stay ahead:
- Conduct regular property audits. Schedule periodic inspections to assess vulnerabilities.
- Use professional services. From security surveys to lock changes, relying on trusted insurance-approved providers ensures best practices are followed.
- Check for British Standards compliance. Security equipment approved by British Standards, or stamped by the BSI Kite Mark, is typically approved by insurance providers.
- Maintain detailed records. Having a paper trail of upgrades, inspections, and access logs can support your case should you need to make a claim. Good records can also affect your premiums.
Why It’s Worth Getting It Right
Getting your rental property security right isn’t just about satisfying your insurer; it’s about protecting your investment. A well-secured property means the peace of mind that comes from knowing tenants are safe and that landlord insurance requirements are being met. Security, of course, also supports high occupancy rates and stable rental income.
When insurers see that you’ve taken proactive security steps, such as regular inspections, documented security upgrades, and professional surveys, they’re far more likely to offer favourable terms and cheaper premiums in the future. Ultimately, strong security isn’t just a cost; it’s a smart investment that protects both your property, bottom line and professional reputation.
Secure Your Property, Keep Your Insurance Valid
Imagine a tenant moves into your flat and is later burgled by someone using an old key. If you didn’t change the locks after the last tenancy, the claim is likely to be denied, and you could face legal consequences. Tenants expect a safe home. If you fail to deliver, you risk high turnover and reputational damage.
The bottom line? Security is not just a safety issue; it’s a business-critical requirement. As a landlord or property manager, keeping your properties compliant with insurance and regulatory expectations isn’t just smart, it’s essential.
Whether you manage a single flat or an extensive property portfolio, proactive security measures will help you keep your insurance valid, protect your tenants, avoid costs and legal liabilities, and, finally, enhance your professional reputation.
At Security Masters, we specialise in securing properties for landlords, developers, and portfolio managers in Essex and beyond. As Master Locksmiths, we are approved by all the UK’s major insurers and can therefore provide you with all the advice and services you need to keep your property covered.