Security tips for renters: strengthening tenancies without permanent changes

Renting in London offers flexibility and convenience, but it can sometimes come at the cost of control over home security. Tenants often find themselves restricted by tenancy agreements that prohibit drilling, replacing locks, or making structural changes to doors and windows. This can leave renters wondering how to make their living space feel safer without upsetting the landlord.

At SMR Locksmiths Ltd, we’ve worked with countless tenants across South London—from Streatham to Norbury, Croydon to Balham—helping them find practical, non-invasive ways to improve security and peace of mind. Whether you’re in a new-build flat, a converted Victorian house, or shared accommodation, there are many solutions that strengthen safety without violating rental agreements.

This article explores the best renter-friendly security tips, highlights common vulnerabilities in rental properties, and explains how SMR Locksmiths Ltd can help tenants achieve safer living without permanent changes.

Understanding the renter’s dilemma

Landlords are ultimately responsible for providing secure locks that meet legal standards, especially on front doors and accessible windows. However, security expectations vary widely. Some tenants inherit ageing locks, loose doors, or windows that haven’t been upgraded in years. Others may feel uneasy about how many spare keys are circulating, especially in HMOs (houses in multiple occupation) or properties with frequent tenant turnover.

The challenge? Renters are limited in what they can do: most tenancy agreements prohibit drilling, replacing locks, or altering doors and windows. This means tenants need portable, removable, or easily reversible security solutions.

That’s where the expertise of local locksmiths, like SMR Locksmiths, becomes invaluable—because professional advice ensures tenants stay safe while also staying compliant.

Common security risks in rental properties

1. Unchanged locks between tenants
2. One of the most frequent issues we see is landlords not rekeying or replacing locks when a new tenant moves in. This means former tenants (or anyone they gave a copy of the key to) could still have access.
3. Low-grade cylinders
4. Some older properties have euro cylinders that are prone to snapping, bumping, or picking—techniques burglars use to gain entry quickly and quietly.
5. Weak internal doors
6. Many rental flats have hollow-core internal doors with minimal security, which might be fine for privacy but not for safety in a shared household.
7. Windows without secondary locks
8. Ground-floor flats and HMOs often have sash or casement windows that lack additional locks, making them easy entry points.
9. Poor lighting and visibility
10. A dark front entrance or an obscured communal door creates an opportunity for opportunistic crime.

By identifying these risks early, tenants can take action with minimal, non-permanent measures.

Renter-friendly security upgrades

Here are practical solutions you can implement without breaching tenancy agreements, many of which SMR Locksmiths Ltd can supply and fit:

1. Request a lock check from a professional locksmith

Before investing in add-ons, tenants should first confirm that the existing locks meet British Standard BS3621 (for mortice locks) or TS007 3-star standard (for euro cylinders). We frequently perform lock checks for renters—verifying compliance, advising on weaknesses, and even liaising with landlords if an upgrade is legally required for insurance purposes.

2. Use a portable door security bar or jammer

A removable security bar placed under the door handle can prevent forced entry. These don’t require drilling and can be taken with you when you move out.

3. Add non-permanent window locks

Many renters use lockable window restrictors that attach with adhesive pads or removable fittings. They stop windows from being opened wide from the outside, and are especially useful in ground-floor flats. SMR Locksmiths Ltd can supply approved restrictors designed for renters.

4. Install a door reinforcement device

Products like door-frame guards, hinge bolts, or non-invasive door jammers reinforce the frame against kicks or forced entry. SMR Locksmiths Ltd often recommend snap-proof door guards that can be fitted and removed without drilling.

5. Fit a secondary, removable bolt inside

Tenants can use portable internal bolts or chain locks that fit with pressure clamps, avoiding screws or permanent alterations. These are popular with renters wanting an added layer of security at night.

6. Upgrade visibility with a peephole or camera viewer

Some peepholes can be fitted without drilling, using adhesive brackets that hold securely but don’t leave marks. Alternatively, Wi-Fi-enabled video doorbells (like Ring or Eufy) can be mounted with adhesive plates instead of screws. SMR Locksmiths Ltd can advise on the best option for your tenancy type.

7. Secure sliding and patio doors

If your rental has patio doors, add a removable sliding bar or a simple dowel rod in the track to prevent forced entry. This is a quick, non-invasive way to strengthen vulnerable doors.

A simple dowel rod can be placed in the bottom track of a sliding patio door to act as a secondary, inexpensive lock. To do this, you simply measure the length of the door’s track when the door is closed, cut a dowel rod (wood or metal) to that size, and insert it into the track behind the sliding panel. This low-tech method prevents the door from sliding open, even if the primary lock is bypassed, providing an effective security measure

8. Improve lighting with plug-in sensors

While not a locksmith job, renters can plug in motion-sensor lights inside hallways or near windows. This deters intruders and improves visibility without requiring electrical work.

Working with landlords the smart way

Renters often worry that raising security concerns will upset their landlord. In reality, most landlords appreciate tenants who are proactive about safety, as it reduces liability and risk of property damage.

SMR Locksmiths Ltd frequently supports tenants by:

• Providing professional reports outlining existing lock standards (ideal to show landlords).
• Recommending upgrades that landlords are responsible for—like changing locks after tenancy changes.
• Supplying compliant solutions that meet insurance standards, which landlords often agree to fund.

A good approach is to frame security improvements as protecting both tenant and property. When a locksmith highlights risks, it carries more weight than if a tenant simply complains.

SMR Locksmiths: helping renters feel safe without breaking the rules

As a trusted South London locksmith company, SMR Locksmiths Ltd regularly helps tenants secure their homes without causing issues with landlords. Services we provide include:

• Non-invasive lock solutions such as anti-snap cylinders that can often be swapped back at end of tenancy.
• Window restrictor supply and fitting, perfect for rental flats and HMOs.
• Master key system advice for HMOs, ensuring tenants have private security while landlords maintain access.
• Emergency lockout support in Streatham, Norbury, Croydon, and surrounding areas.
• 24/7 call-outs for situations where a tenant’s security is compromised, such as a broken lock or lost key.

Because we understand the balance between tenant safety and landlord regulations, we’re well placed to advise on renter-friendly solutions that enhance peace of mind.

Conclusion

Renters don’t need to feel powerless when it comes to security. While tenancy agreements limit permanent alterations, there are plenty of smart, non-invasive measures to protect yourself and your belongings. From portable door bars and window restrictors to professional lock checks, every step strengthens your tenancy without risking disputes.

SMR Locksmiths Ltd is proud to help renters across Streatham, Norbury, Balham, and the wider South London area. With tailored advice, compliant products, and 24/7 locksmith services, we make sure tenants can enjoy safety and peace of mind—without upsetting their landlords.

If you’re renting and want to improve your home security, get in touch with SMR Locksmiths Ltd today. Our expert team is ready to help you find solutions that are safe, effective, and tenancy-friendly.