Key Control: Who Has Access to Your Home?
Managing key distribution and knowing exactly who can enter your property.
Lock Replacement Available Now
Lock Replacement BS3621 Insurance Standard
Need to change your locks? We do that every day. New locks, new keys, same-day where possible — you choose who has a key.
from £79 Quoted Up Front
5-Star Google Reviews
Same Day Service
DBS-Checked Engineers
£2M Public Liability
12-Month Workmanship Warranty
Anti-Snap Stocked
Open late, until midnight
BS3621 locks fitted to insurance standard. See how it works ↓
The Question That Keeps You Awake
Who Else Has a Key?
It's a quiet question worth asking. If you can't account for every key to your home, it's time to change locks — your home isn't fully under your control.
Just Moved In?
Previous owners, former tenants, cleaners, dog walkers, neighbours with spare keys — you have no idea how many copies of your keys exist. The estate agent didn't collect them all. That's why front door lock replacement is the first thing smart homeowners arrange when moving into a new house.
Lost or Stolen Keys?
That missing key set could be anywhere. If your address was on the keyring — or someone knows where you live — your home is vulnerable right now. Don't wait to find out who has your keys.
Relationship Ended?
When trust breaks down, lock security becomes personal safety. Whether it's a partner, housemate, or family member — if the relationship has ended and they have keys, you deserve to feel safe in your own home.
Locks Wearing Out?
Keys that stick, grind, or need jiggling are warning signs. A lock that's hard to operate is on its way to failing completely — often the day you're in a rush. Replace it before it leaves you locked out or locked in.
Been Burgled Before?
After a break-in, your locks might look fine — but are they? Burglars often damage mechanisms in ways that aren't visible. More importantly, they know your home now. New locks are part of reclaiming your sense of safety.
Had Builders or Contractors?
Renovation work often means handing over keys to multiple people — plumbers, electricians, decorators. When the work is done, how many copies are still out there? Changing locks closes that chapter cleanly.
New Baby or Growing Family?
Priorities shift when little ones arrive. That nagging thought about who has spare keys suddenly feels more urgent. New locks give you the certainty that your home is secure for your growing family.
Caring for Elderly Parents?
When you're responsible for a parent's home, lock security matters more than ever. Old locks that "they've always had" may be weak points. Upgrading their security shows you care — and gives everyone peace of mind.
What to Look For
What Comes With Every Lock Replacement
There's a difference between swapping a lock and upgrading your security. Here's exactly what's included on every Trulox lock replacement — in writing, before we start.
- DBS-Checked Engineers Enhanced Disclosure and Barring Service background checks on every engineer.
- Quote Agreed Before Any Work No call-out fee. You only pay if you accept the quote — no surprise charges on the day.
- Anti-Snap, Anti-Pick, Anti-Bump Cylinders TS007 3-star cylinders where required. BS3621 mortice locks for insurance compliance.
- £2M Public Liability Cover Specific insurer cover, in force on every job. Documentation supplied on request.
- 12-Month Workmanship Warranty In writing, on every replacement. If anything fails to operate properly, we return.
- Insurance Documentation BS3621 / TS007 spec records supplied — useful if your home insurer asks.
- Clean Fitting, No Damage Old locks removed without damaging your door or frame. Property left tidier than we found it.
- No Subcontractors The engineer who quotes is the engineer who fits your locks. Family-run, no booking line, no third-party crew.
Our Process
How Lock Replacement Works
Simple, transparent, on your schedule. Here's exactly what happens when you call.
Tell Us Your Situation
Quick call or message. Whether you've just moved in, lost keys, or want a security upgrade, we understand your situation and explain your options clearly. No jargon, no pressure.
~2 minutesWe Come To You
Same-day where possible, or scheduled to suit you. Our engineer arrives with the tools and a selection of BS3621-standard locks ready to fit. Whether it's a planned upgrade or you need locks changed today, we come to you.
You choose the timeSecurity Assessment
We inspect your existing locks and door, then explain your options clearly. We'll tell you if your current lock is adequate, or recommend upgrades if there are genuine vulnerabilities. Honest advice, no upselling.
~5 minutesProfessional Installation
Clean, precise fitting with no damage to your door or frame. We take care to protect your property and clean up after ourselves. The new lock is tested thoroughly before we consider the job done.
10-30 min per lockNew Keys. Old Ones Are Useless.
Your new keys work cleanly from the first turn. The old ones are now useless — you choose who has a key from this point on. We only take payment once everything's tested and you're satisfied.
Peace of mind Lock Types
Locks We Fit (uPVC, Composite, Wooden Doors)
From standard cylinders to specialist multipoint systems — we carry and fit them all, including Yale, ABS, Mul-T-Lock, Avocet and Ultion.
Euro Cylinder (Barrel) Replacement
The standard lock barrel for uPVC and composite doors. Our lock cylinder replacement service fits quality anti-snap, anti-pick, anti-bump cylinders that resist the most common attack methods. Available in various sizes to match your door.
Mortice Deadlocks
Traditional security for wooden doors. We replace 5-lever BS3621 certified locks—the standard most insurers require. If your lock doesn't meet this standard, upgrading could improve your insurance position.
Multipoint Locking
Full-length locking mechanisms for uPVC and composite doors. We can replace the entire gearbox, individual hooks and rollers, or just the cylinder—depending on what's needed.
Anti-Snap Upgrades
Modern cylinders with sacrificial break-off sections. If an attacker snaps the cylinder, the inner section stays in place—keeping your door locked. Essential security for uPVC doors.
Yale Lock Replacement
Need to replace your Yale lock? Rim-mounted nightlatches for secondary security or convenience. We supply and fit Yale and British Standard nightlatches. A good nightlatch complements a primary deadlock but shouldn't be used alone for security.
Commercial Locks
Heavy-duty cylinders and access control for business premises. We understand the specific requirements of landlords, letting agents, and commercial properties—including master key systems.
Full Service
What's Included in Your Lock Replacement
One call, everything handled. Professional lock fitting service with no unexpected extras. New locks fitted, new keys, complete peace of mind.
Lock Removal
Old locks removed carefully without damaging your door or frame. We handle even seized or corroded locks without causing additional problems.
New Lock Fitted
Quality replacement installed to manufacturer specifications. Properly aligned, correctly sized, and functioning smoothly from day one.
Full Key Set
Multiple keys included with every new lock—typically 3-5 depending on the cylinder. No need to pay extra for copies.
Clean Finish
No mess, no debris, no metal filings on your doorstep. We clean up after ourselves and leave your property exactly as we found it—except more secure.
Security Advice
Honest assessment of your overall door security. If there are vulnerabilities we can see, we'll point them out—without pressure to buy anything.
Parts Warranty
Quality locks backed by manufacturer warranty. Plus our workmanship guarantee—if there's ever an issue with our installation, we return to make it right.
What Our Customers Say
Real stories from people who took control of their home security.
"Just moved into a new-build and the developer locks were basic. Trulox replaced them with proper anti-snap cylinders — much more reassuring knowing my home is actually secure now."
Verified customer
"After my car keys were stolen with my house key attached, I called Trulox the same day. They changed all my locks before evening. Couldn't believe how straightforward it was."
Verified customer
"Went through a difficult separation and needed to regain control of my home security. Trulox changed all my locks the same day. It gave me back a sense of safety at a really hard time."
Verified customer
Common Questions About Lock Replacement
Making the right decision for your home security.
Do I really need to change my locks after moving home?
Peace of Mind
You have no way of knowing how many keys exist for your current locks—previous owners, tenants, cleaners, or neighbours may still have copies. Changing locks when you move in gives you complete control over who can access your home. Getting your locks changed is the single most important security step for any new homeowner.
What's the difference between cheap locks and quality ones?
Security Investment
Budget locks are often made from softer metals and have simpler mechanisms that are vulnerable to snapping, picking, and bumping attacks. Quality anti-snap cylinders include hardened steel pins and sacrificial break-off sections that keep you secure even during an attack.
Can you match my new lock to my existing keys?
Convenience
In some cases, yes—this is called "keying alike." If you have multiple doors and want one key for all, we can supply cylinders that work with the same key. We'll discuss your options during the assessment.
How long does a lock replacement take?
Time Planning
A standard cylinder replacement typically takes 10-15 minutes per lock. More complex jobs like multipoint lock changes may take 30-60 minutes. We always give you a realistic timeframe before starting.
Will changing my lock affect my home insurance?
Insurance
Most insurers require BS3621 certified locks on external doors. We can advise whether your current locks meet this standard and fit compliant replacements if needed. This can actually improve your insurance position.
Should I replace all my locks at once?
Value Decision
If you're changing locks for security reasons—like lost keys or moving home—it makes sense to do them all at once. We offer competitive rates for multiple locks and can ensure consistent security across all entry points.
What happens to my old lock?
Disposal
We remove and dispose of old locks responsibly. If you prefer to keep the old cylinder (some landlords require this), just let us know and we'll leave it with you.
Can you make my door more secure while you're here?
Upgrade Options
Absolutely. We can add security features like anti-snap cylinders, reinforced strike plates, or additional locks. We'll assess your door and make honest recommendations—no pressure to buy anything you don't need.
Do you fit locks I've bought myself?
Customer Choice
Yes, we're happy to fit customer-supplied locks. Just be aware that we can only warranty our workmanship, not the lock itself. If you're unsure what to buy, we can advise on the best options for your door.
What if I want the same key for front and back doors?
Key Management
This is a common request and usually straightforward to arrange. We can supply cylinders "keyed alike" so one key opens multiple doors. It's convenient and doesn't compromise security.
Our Guarantee
Family-Run, In Writing
Trulox is independent and family-run — the engineer who quotes is the engineer who fits your locks. Here's what we put in writing on every replacement.
12-Month Workmanship Warranty
Every lock fitted comes with a 12-month workmanship warranty in writing. If anything fails to operate properly within that period because of how we fitted it, we return and put it right at no charge.
Quote First, Then Fit
You'll know the exact cost before any work starts — lock type, labour, everything included. No call-out fee, no surprise charges on the day. You only pay if you accept the quote.
BS3621 + TS007 3-Star
Mortice locks fitted to BS3621 — the standard most UK home insurers list. Anti-snap cylinders fitted to TS007 3-star where required. Quality cylinders by Yale, ABS, Mul-T-Lock, Avocet and Ultion stocked on the van.
£2M Public Liability Cover
Specific £2M Public Liability cover in force on every job. Insurance documentation supplied on request — useful if your home insurer asks. DBS-checked engineers, no subcontractors, every time.
Expert Advice
Related Reading
Guides to help you make informed decisions about your home security.
Euro Cylinder Sizing: How to Measure Correctly
Getting the right size first time—avoid the most common replacement mistake.
Repair or Replace? Making the Right Lock Decision
When repair makes sense and when replacement is the better choice.
Complete Door Security: Beyond Just the Lock
Hinges, frames, and reinforcements that complement your lock upgrade.