How to Check If Your Front Door Lock Meets Your Insurer's Requirements

The only reliable way to know whether your front door lock meets your insurer's requirements is to compare the exact lock on your door with the wording in your own policy schedule, statement of fact and any minimum-security endorsement. There is no single lock rule used by every UK insurer.

At Swift Locksmiths, we can identify the lock type, standard markings and condition of the door, but we do not tell customers that a particular lock is "insurance approved" for every policy. Current insurer guidance itself shows why: some policies accept several different lock arrangements, some apply extra security conditions only to certain properties, and the contractual requirement can depend on the answers given when the policy was taken out.

The best approach is therefore evidence-led. Identify the door and lock, read the actual policy wording, verify any British Standard or security certification claimed on the hardware, and ask the insurer or broker to confirm any point that remains unclear.

Published: 4th November 2026

Why There Is No Universal "Insurance-Approved Lock"

Home insurance is a contract between you and your insurer. The security conditions are therefore set by the insurer and can vary by product, property and underwriting decision. MoneyHelper advises consumers to answer insurance questions honestly and accurately and to understand what is and is not covered before buying. That principle applies directly to lock declarations.

LV's current home-insurance guidance provides a useful real-world example. It says some properties require additional security features and that the customer is told during quotation and in the policy documents. Where that condition applies, LV lists several acceptable door-security routes rather than one universal lock: certain five-lever mortice deadlocks, locks to a minimum BS3621 rating, three-point multipoint locking systems, or existing locks plus additional key-operated locks in the described arrangement.

Evidence note: The example above illustrates current insurer wording; it is not a promise that the same requirements apply to your own policy.

Step 1: Find the Security Wording in Your Policy

Start with the schedule, statement of fact, policy booklet and endorsements. Search for terms such as "minimum standards of security", "theft", "locks", "security", "unoccupied", "alarm" and "window locks". An endorsement may be more important than the general policy booklet because it can apply a specific condition to your property.

If your insurer's online account shows the answers you gave when buying the policy, check those too. A common risk is that the customer has declared a British Standard lock without ever checking the faceplate or product marking. If the answer is wrong, correct it rather than hoping the difference never matters.

Step 2: Identify the Door Before the Lock

Insurance questions often distinguish between door types because they use different locking systems. A solid timber door may have a mortice deadlock or sashlock. A uPVC or composite door commonly has a multipoint mechanism operated by a euro cylinder. Patio and French doors can have their own arrangements. Communal-flat entrance doors introduce fire and escape considerations as well as security.

A photograph of the door edge with the door open is often enough to distinguish a multipoint strip from a single mortice lock. A photograph of the lock face or cylinder can reveal markings that are not visible when the door is closed.

Step 3: Check for BS3621 Correctly

BS3621 is one of the most familiar insurance-related lock standards in the UK, but it is frequently misidentified. The current standard is BS3621:2017+A1:2024. BSI defines it as a thief-resistant mechanically operated single-point lock assembly that can be locked from both sides with a key and therefore requires key egress.

A genuine compliant product normally carries relevant certification markings on the lock faceplate or packaging. The important point is that "five lever" and "BS3621" are not synonyms. Current BSI product directories show many five-lever products certified to BS3621, but the certification is what proves the standard, not the lever count alone.

What If You Have a Five-Lever Mortice Lock?

Count information can be useful, especially because some insurer wordings still refer to five-lever mortice locks. But if your policy specifically asks for BS3621, do not answer yes merely because a locksmith or hardware shop once called the lock "five lever". Look for the standard marking or verify the exact model.

If no marking is visible, the lock may pre-date modern markings, may be a non-certified five-lever product or may be a model where identification needs more work. We can inspect the lock case and advise what is actually fitted.

Step 4: Check Multipoint Locking Properly

On uPVC and composite doors, the visible euro cylinder is only the control component. The multipoint strip does the mechanical locking by engaging hooks, bolts, rollers or other points into the frame. Some insurer wording asks for a minimum number of locking points, while crime-prevention guidance focuses additionally on cylinder resistance.

Do not simply count every roller as a "security point" and assume it satisfies a policy. If the insurer requires a three-point multipoint lock, ask it how it defines the requirement if the mechanism uses a mixture of hooks, deadbolts and rollers.

Step 5: Check Euro-Cylinder Security

Current police guidance recommends enhanced euro-cylinder protection on external uPVC and composite doors. British Transport Police advises choosing a TS007 three-star cylinder when changing suitable euro-profile locks. West Yorkshire Police also recognises TS007 three-star and Sold Secure SS312 Diamond as nationally recognised high-security routes.

Those ratings are strong evidence of cylinder security, but they should not be confused with a universal insurer requirement. If your policy only says "multipoint locking system with at least three points", the cylinder rating may be a sensible security upgrade even if it is not the exact contractual test named by the policy.

Step 6: Check Whether Additional Conditions Apply

Some policies can impose conditions beyond the main front-door lock. Current insurer examples include key-operated accessible-window locks, specific sliding-door arrangements, alarms or additional bolts. These conditions may apply only where shown on the schedule or where requested during quotation.

This is why a locksmith cannot certify your whole insurance compliance from the front door alone. We can identify physical security features, but the insurer's contract may include windows, alarms, occupancy conditions or other requirements outside ordinary locksmith work.

BS3621 vs BS8621: Why Escape Matters

BS3621 covers key operation from both sides and therefore key egress. BSI's current BS8621:2017 standard covers thief-resistant single-point lock assemblies that can be unlocked from inside without a key. The distinction matters where rapid escape is important, including some flats and other applications where keyless egress may be required or preferred.

Some insurer wording explicitly recognises BS8621 for certain flats or maisonettes because of fire-safety considerations. Never replace keyless-egress hardware with a key-locked internal arrangement solely to chase a familiar insurance phrase without checking the building and escape requirements.

What Does a Kitemark Prove?

The BSI Kitemark is a certification mark used on products that have been assessed under the relevant certification scheme. For lock identification, it can help distinguish an independently certified product from one that merely looks similar.

However, a Kitemark alone is not enough unless you know which standard it relates to. A TS007 Kitemark on a euro cylinder answers a different question from a BS3621 Kitemark on a thief-resistant single-point lock assembly.

How to Photograph Your Lock for the Insurer

• Photograph the whole closed door from inside and outside.
• Open the door and photograph the full locking edge.
• Take a close-up of the mortice-lock faceplate or euro-cylinder face.
• Photograph any visible Kitemark, star rating, standard number or manufacturer name.
• For multipoint doors, include the hooks/bolts and a photo of the handles.
• Do not photograph or share key codes, security-card numbers or restricted key-registration information unnecessarily.

What If the Insurer's Question Is Vague?

Ask for clarification before guessing. A useful written question is: "My front door is a composite door with a multipoint locking mechanism and a TS007 three-star euro cylinder. Does this meet the minimum-security condition on my policy?" That gives the insurer specific facts rather than asking whether the door is "secure enough".

Keep the reply with your policy documents. If the insurer confirms a particular arrangement is acceptable, written evidence is much more useful than relying on a telephone conversation you may not be able to reproduce later.

What If Your Lock Does Not Meet the Requirement?

Do not panic and do not replace the whole door automatically. The required change may be a new mortice lock, a cylinder upgrade, additional protective hardware, an alignment repair or a more substantial door-security improvement depending on the wording and existing setup.

Our lock replacement and door-security services focus on the minimum proportionate work needed to reach the required security standard without replacing sound components unnecessarily.

Can a Locksmith Guarantee an Insurance Claim Will Be Paid?

No. Claims decisions are made by insurers under the policy terms and facts of the loss. A locksmith can identify, fit and document security hardware. We can provide invoices and describe the product installed, but we cannot guarantee how an insurer will interpret a future claim.

If the policy requires a specific standard, ask the insurer to confirm the exact requirement before work where practical. That gives both you and the locksmith a clear target.

What If the Lock Was Correct but You Did Not Use It?

Some policy conditions require the specified security to be put into operation when the home is unattended. Having a BS3621 deadlock that is never used, or a multipoint door where the handle is lifted but the final key/turn action is not completed, may create a different issue from hardware specification.

Police guidance on multipoint doors remains clear: lift the handle, lock the mechanism and remove the key where appropriate. The best lock only helps when it is actually engaged.

Do Better Locks Always Reduce Premiums?

MoneyHelper notes that improving home security with BSI-approved locks and alarms can help when seeking insurance quotes, but pricing varies by insurer and risk model. Do not assume that spending £300 on a lock automatically produces a specific premium saving.

Security upgrades should be chosen first for sensible risk reduction and contractual compliance. Any premium effect is secondary and should be confirmed through quotes rather than guessed.

What If You Move House?

Moving home is a good point to review both key control and insurance declarations. Even if the existing lock meets a recognised standard, you may not know how many old keys remain in circulation. Changing or rekeying the relevant cylinder/lock can restore key control while preserving the required security specification.

Update the insurer with accurate information about the new property rather than copying the lock answers from your previous address.

Our Five-Point Insurance Lock Check

Does National Burglary Data Change Insurance Rules?

No. ONS recorded 223,456 police-recorded burglary offences in England and Wales in the year ending March 2026, down 9% year on year. That statistic gives national crime context, but insurers set their own underwriting terms and security conditions. A falling national burglary count does not automatically remove a security endorsement from an individual policy.

Likewise, living in a low-crime area does not make an inaccurate lock declaration harmless. The contract is based on the information and conditions agreed with the insurer.

A Practical Example of Checking an Insurance Declaration

Imagine the proposal form says: "Is the final exit door secured by a lock meeting BS3621 or by a multipoint locking system?" A timber door with an unmarked five-lever mortice lock should not automatically be declared BS3621. A composite door with a multipoint strip should be described as multipoint, and the number/type of locking points can then be confirmed if the insurer asks.

If you later upgrade the euro cylinder to three-star, keep the invoice and product details, but do not rewrite the policy answer as BS3621 unless the actual lock assembly is certified to that standard. Our lock identification and replacement service can document what is fitted so you can give the insurer accurate information.

Records Worth Keeping After a Security Upgrade

• Lock manufacturer and exact model.
• Standard or star rating shown on the product.
• Invoice describing the work completed.
• Before-and-after photographs where useful.
• Any written confirmation from the insurer or broker.
• Warranty or certification information supplied with the lock.

Our Recommendation

Do not ask "What lock do insurers require?" as though there is one UK answer. Ask "What does my policy require, and what is actually fitted to my door?" That produces a verifiable, useful result.

You can read about our independent locksmith approach or contact Swift Locksmiths with photographs and the exact wording from your policy. We can identify the physical lock and standard; you can then obtain the insurer's confirmation where necessary.