Key Duplication & Lock Rekeying
in Malaysia (2026)

This guide explains how keys and locks are copied, rekeyed and replaced in the Klang Valley. Key cutting and rekeying are priced per job — ask us on WhatsApp and we reply within the hour.

What key duplication actually involves

Copying a key sounds like a photocopy, and for a plain house key it very nearly is. The original is clamped alongside a blank of the same profile, a tracer follows the cut pattern of the original while a cutting wheel reproduces it on the blank, and the new key is deburred so it does not chew the lock. On a good machine the whole thing takes a couple of minutes.

Two details decide whether that goes well. The first is the blank. A key blank has to match the keyway — the shaped slot the key slides into — and a near-enough blank that has been forced to fit is the usual reason a fresh copy jams or turns roughly. The second is which key you copy from. Copying a copy compounds error: each duplication carries a fraction of a millimetre of drift, and by the third generation the cuts sit far enough off the factory depth that the pins no longer line up cleanly. If you still have the original that came with the lock, cut every new key from that one, not from the spare in your pocket.

The better shops will cut to code rather than by tracing, when the code is available — the lock’s own numbered cutting specification is entered into the machine, and the result is a key cut to factory depth regardless of how worn the sample is. If a copy has been sticking, that is the fix to ask for.

Key types, and which ones can be copied

“Can you copy this?” has a different answer for each of the things people carry on one ring:

The line that matters for planning: anything on the top half of that table is a same-day errand, and anything on the bottom half is a booking.

Restricted keys: why the shop refuses

If a locksmith turns you away, it is usually not laziness. Restricted keyways are sold on the basis that the blanks are controlled: the manufacturer supplies them only to a registered dealer, and the dealer will only cut against a security card or a written authorisation naming the person entitled to order copies. That control is the entire value of the system — it is what stops a departing tenant, a contractor or a former employee quietly walking a copy out of the building.

Practical consequences worth knowing before you specify one:

• Keep the card safe and know who holds it. Losing the authorisation card is a far bigger problem than losing a key, because it can leave you unable to order legitimate copies of your own system.
• Copies take days, not minutes. Build that into a handover schedule. Turning over a serviced apartment on the day is not compatible with a restricted key you have not ordered in advance.
• The register has to be maintained. A restricted system whose key register has not been updated for five years gives you the cost of the system and none of the control.
• It is a good match for offices, hostels and managed buildings and usually overkill for a single terrace house, where an ordinary cylinder that you actually rekey when needed is the better value.

Rekeying vs replacing the lock

Rekeying means opening the cylinder and changing the pin stack so it accepts a new key pattern. The lock body, the handle, the strike plate and the mortise in the door all stay exactly as they are; only the key changes. Every key cut to the old pattern stops working the moment the job is finished. Because nothing is removed from the door, there is nothing to make good afterwards — which is why rekeying is the default answer whenever the lock itself is sound and the problem is purely who holds a key.

Rekeying is not always available. Some inexpensive cylinders are not designed to be serviced, a seized or corroded cylinder is not worth saving, and a digital lock has no pins to change — on a digital lock you delete the user credentials instead, which achieves the same thing in about thirty seconds and is one of the strongest arguments for fitting one on a rental unit.

Replace the lock rather than rekey it when the lock is worn or damaged, when the grade is wrong for the door, when you want a different credential type altogether, or when the door hardware is being changed anyway. If the door itself is the problem — a dropped leaf, a warped frame, a strike that no longer aligns — no amount of lock work fixes it; see our door repair guide → first, because a lock fitted to a misaligned door will fail again.

When to rekey, and when a copy will do

The test is simple: can you account for every key that has ever been cut? If yes, cut another copy. If no, rekey. Applied to the situations that actually come up:

The tenant boundary: when you may not change a lock

This is the part of the subject that gets landlords into real trouble, so it is worth stating plainly. In Malaysia a landlord cannot recover possession of a tenanted property by changing the locks. Locking a tenant out, cutting utilities or removing their belongings is self-help eviction, and it is unlawful without a court order — the rule holds even when rent is months overdue and even when the tenant has not been seen for weeks. Our eviction guide → and abandoned-unit guide → set out the process that does work.

So the honest framing of “rekey between tenants” is this: you rekey after possession has lawfully come back to you — at a proper handover, at the end of a tenancy the tenant has ended, or after a court order has been carried out. You do not rekey to create that moment. A locksmith who is asked to open or change a lock on an occupied property should be asking who you are and what entitles you to it, and a good one will decline if the answer is unsatisfactory.

The related points worth holding on to:

• Tenants generally should not rekey either without the landlord’s agreement — the lock is the owner’s property, and a tenant who changes it and cannot hand back a working key at the end is likely to be arguing about the deposit.
• Agree key handling in the tenancy agreement: how many keys are issued, whether copies may be cut, who pays to rekey if keys are not returned, and that all keys and access cards come back at the end.
• Count the keys back at handover and note the number in the inventory. See vacant possession & handover →.
• An occupant who is not a tenant is a different legal question again — see squatters & illegal occupants →. It is still not a lock problem.
• Screening reduces how often this matters. Tenant screening → is cheaper than any of the remedies above.

Condo access cards, fobs and strata rules

In a Klang Valley condo the front-door key is often the least important credential you hold. The card or fob that opens the lobby, calls the lift to your floor and lets you into the car park is issued by the management office, is tied to your unit in their system, and is governed by the building’s by-laws rather than by you. Management typically controls how many are issued per unit, charges for replacements, and can deactivate a lost one — which is exactly the behaviour you want, and the reason unauthorised duplication is usually prohibited outright.

The technical point behind that rule: not all cards are equally copyable. Older low-frequency cards broadcast a fixed number and can be cloned onto a blank in seconds by anyone with a cheap reader/writer, which is why a building still running them has weaker access control than it thinks. Encrypted higher-frequency credentials authenticate rather than simply announce themselves, and cannot be duplicated the same way. If you are specifying a system for an office or a small building, that distinction is the decision — our office door access guide → and face recognition vs fingerprint comparison → cover the options.

Two more strata realities. Changing your unit’s own front-door lock is generally your business, but anything that alters a fire door, a common-property door or the corridor side of your entrance is not — check strata renovation rules → and what counts as common property → before a contractor touches it. And when a building changes its management, the handover of master keys and access cards is one of the items that has to be accounted for — see changing your JMB →.

Master-key systems for buildings and offices

A master-key suite lets one key open many locks while each individual key opens only its own. In a serviced office, a hostel, a clinic or a JMB-managed building the usual shape is three tiers: a change key per door, a sub-master per floor or department, and a grand master held by management. It is convenient, and it concentrates risk: the grand master is a single object that opens the building.

If you are having one designed, insist on these:

• A written key schedule before anything is cut — which key opens which door, how many of each are issued, and to whom. Retrofitting a schedule onto an undocumented suite is expensive.
• A key register you actually maintain, with a signature on issue and on return. A suite without a register degrades into an unknown number of keys within a year or two.
• Restricted blanks for the master levels at minimum, so a grand master cannot be copied at a kiosk.
• A plan for the day the master is lost. That event rekeys every cylinder in the suite, so know in advance what it involves and keep the suite sectioned so the damage is containable.
• Keep high-value rooms out of the suite. A server room, a cash room or a records room is better on its own dedicated key.

What it costs — and what has no published price

Be straight about this. Key cutting, rekeying, master-key suiting and lockout call-outs in Malaysia are quoted per job by the locksmith, and we do not publish a figure for them because we do not have one we can stand behind. What we can tell you is what moves the number, and what the alternative — replacing the lock — costs, because that is published on this site.

Our security door cost guide → also puts the step up from a basic cylinder lock to a multi-point digital lock at an added RM700 – RM2,000 on top of the door — that figure is the increment for the upgrade, not an installed lock price on its own. Read it that way when you are comparing quotes.

The comparison that usually decides it: if the lock is sound and the issue is only who holds a key, rekeying leaves the door untouched and nothing to make good. If you are going to replace anyway, replacing with a digital lock removes key duplication from your life on that door permanently — which on a rental you turn over twice a year is worth more than the hardware costs.

Choosing a locksmith safely

You are inviting someone to defeat your security while you watch, and then trusting them not to keep a copy. Treat it accordingly:

• Expect to prove you are entitled to the lock. A locksmith who will open or rekey an occupied property without asking who you are will do the same for the next person. Being asked for your identity card and something linking you to the address is a good sign, not an insult.
• Get the price before the work starts, including any call-out and any after-hours element, and get it in a message you can point back to. The classic complaint is a low quote on the phone that becomes a large bill once the cylinder is already drilled.
• Ask whether entry will be non-destructive. For a lockout, the question “will you try to open it before you drill it?” is worth asking, because drilling means buying a new lock as well as paying the call-out.
• Ask what happens to the old key pattern. After a rekey, every previously cut key should be dead. Confirm that, and test it with an old key before the locksmith leaves.
• Get a receipt naming what was done — which cylinders, how many keys issued. On a rental or a managed building that record is the start of your key register.
• Do not photograph your keys and do not post the photo. A clear image of a key is enough information to reproduce it.
• Fix the door, not just the lock. If the leaf drops, the frame is soft or the strike is out of alignment, that is what to address — see door repair → and security doors & grilles →.