Moving into a new flat in Singapore? A checklist for locks and keys

Why this belongs on the move-in list, not the “someday” list

Somewhere between booking movers, transferring utilities, and unpacking boxes, locks tend to slide down the priority list. That’s understandable, but it’s also the one item on a move-in checklist with a real security dimension: you genuinely don’t know how many key copies exist for a unit you’ve just taken over, whether it was previously owner-occupied, rented out to tenants, or sat vacant with contractors coming and going.

The checklist

Main door lock. Decide between rekeying (changing the internal pins so old keys stop working, cheaper) and full replacement (new hardware, useful if you’re switching to a digital lock or the existing one is worn). Either resets who can get in with an old key.

Gate lock. If your unit has a metal gate, it has its own lock and key set, separate from the main door. It’s easy to handle the main door and forget the gate entirely, so treat it as its own line item.

Digital lock setup, if applicable. If the unit already has a digital lock, don’t assume the previous owner’s codes and fingerprints were cleared. Factory-reset it or have a locksmith do so, then set up your own PIN, cards, or biometrics from scratch.

Spare keys. Once the new locks or codes are set, get two or three spare keys cut and store them somewhere separate from your usual bag or car keys, ideally with a trusted family member or in a home safe.

Mailbox and letterbox lock. Often overlooked, but if the previous resident’s key wasn’t handed over, it’s a small, inexpensive fix worth doing at the same time as the main door.

Storeroom, bomb shelter, and internal doors. HDB flats often have a storeroom or bomb shelter with its own lock, and internal bedroom doors sometimes carry old, unmatched keys from years of previous tenants. These are lower priority than the main entry points, but a quick check makes sense, especially if you plan to use the storeroom for anything valuable.

Handling a resale flat versus a new build

The checklist above applies to any move, but the level of urgency differs by situation. A resale HDB flat or a condo unit bought from a previous owner carries more unknowns: past tenants, past contractors, and however many years of key copies made along the way. A brand new BTO flat or newly completed condo has a shorter history, but it’s still worth confirming with the developer how many sets of keys were issued and to whom, since show unit staff and finishing contractors typically hold copies during the handover period.

Item	Action	Priority
Main door lock	Rekey or replace	High
Metal gate lock	Rekey or replace	High
Digital lock codes	Factory reset and reprogram	High, if applicable
Spare keys	Cut 2 to 3 copies	Medium
Mailbox lock	Replace if key missing	Low

Booking it alongside everything else

Most locksmiths can handle a rekey or lock swap the same day you call, so this doesn’t need to be scheduled weeks in advance the way movers or renovation contractors often do. If you’re also having any renovation work done before moving in, it’s worth timing the lock change for after the contractors finish, since builders and installers passing through during renovation are another group who may have had temporary access.

Ask the locksmith to confirm how many keys or codes you’re walking away with once the work is done, and get a brief walkthrough of the new lock’s operation, especially for a digital lock, so you’re not troubleshooting it alone on your first night in the new place. Reviews across the directory consistently mention fast turnaround and clear aftercare instructions as what separates a smooth move-in job from a frustrating one.

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