Full catalogue

Every letterbox lock we fit, with the installed price

Nine models, one price each, installation always included. For every lock we list what it does well, what to weigh up, and when it is the wrong choice — because the wrong lock fitted well is still the wrong lock.

The full range, model by model

No battery

Silver keyed HDB letterbox lock supplied with two keys

Installed from: S$50
Access: Key
Power: No battery
Code digits: —
Backup key: Spare key included
Finishes: Silver

Traditional Key Lock

Classic keyed lock. Simple, dependable, the standard HDB replacement.

Best for: Anyone happy with a key, and landlords wanting a like-for-like swap.

Advantages

Nothing to learn — everyone in the household already knows how to use a key
No code to forget, and no battery to replace
Our lowest price point, and the fastest fit
Extra keys can be cut cheaply at any hardware shop

Considerations

Every additional user needs their own cut key
If all keys are lost, the lock must be drilled and replaced
Keys wear over time and eventually need replacing

Not suitable when

You want to stop carrying keys altogether
Several people need access and you do not want to cut keys

Most popularNo battery

Installed from: S$50
Access: Code
Power: No battery
Code digits: 3
Backup key: None — code only
Finishes: Black, White, Silver

Battery-Free Combination

No battery, no key. Set your own 3-digit code. Our most popular model.

Best for: Families sharing access who never want to think about keys again.

Advantages

Nothing to carry and nothing to lose — the code is in your head
Share access instantly by telling someone the code
Completely mechanical: no battery, ever
Change the code yourself any time, at no cost
Three finishes to match your mailbox

Considerations

A 3-digit code gives 1,000 combinations — ample for a residential block
Dials need a deliberate turn; very stiff fingers may prefer P5

Not suitable when

You may forget the code and want a way to recover it — choose P3 instead
The mailbox is fully exposed to driving rain — choose P6 or P9

No battery

Combination letterbox lock supplied with a backup key

Installed from: S$55
Access: Code
Power: No battery
Code digits: 3
Backup key: Backup key retrieves your code
Finishes: Black, White

Combination + Backup Key

Code access, plus a backup key that retrieves your code if it is forgotten.

Best for: Keyless convenience, with a safety net if the code is forgotten.

Advantages

Day-to-day you never touch a key — the code does the work
If the code is ever forgotten, the backup key retrieves it
No battery, so nothing to charge or replace
Only S$5 more than P2 for a genuine safety net

Considerations

The backup key retrieves the code — it is not a spare key for daily use
Store the backup key somewhere safe and away from the mailbox
Two finishes only — silver is not available on this model

Not suitable when

You specifically want no key in existence at all — choose P2

Battery

WT black electronic touch-PIN digital letterbox lock keypad

Installed from: S$60
Access: Code
Power: Battery
Code digits: 4–14
Backup key: Per manufacturer — confirmed in writing before installation
Finishes: Black

WT Digital Touch-PIN Lock

WT electronic keypad. Set a code from 4 to 14 digits.

Best for: Anyone who wants a modern keypad and does not mind a battery.

Advantages

Set a code from 4 to 14 digits — as short or as secure as you want
Fastest to operate — tap the code and it is open
Easy to use in a dim corridor or with wet hands
Warns you weeks before the battery runs low
Clean, modern look that suits a renovated lobby

Considerations

Uses a standard replaceable battery — budget a change every so often
Backup key arrangements vary by production batch; we confirm yours in writing before fitting
Black only on this model

Not suitable when

The mailbox is fully exposed to direct rain — choose a zinc-alloy mechanical model
You want to never think about a battery again — choose any of our seven mechanical models

No battery

Easy-grip combination letterbox lock with large dials

Installed from: S$60
Access: Code
Power: No battery
Code digits: 3
Backup key: Backup key retrieves the code only
Finishes: Black

Ergonomic Combination Lock

Large easy-grip dials and clear numerals, with code recovery.

Best for: Elderly residents, or anyone who finds small dials hard to grip.

Advantages

Designed specifically for weaker grip and older eyes
Larger numerals are readable without glasses in a dim corridor
No battery and no key to carry day to day
Code can be recovered if it is ever forgotten

Considerations

The backup key retrieves the code — it does not open the door by itself
Physically larger than P2, so check the door has clearance
Black only on this model

Not suitable when

You want the smallest, most discreet lock face — choose P2

No battery

Silver zinc-alloy combination letterbox lock body

Installed from: S$65
Access: Code
Power: No battery
Code digits: 3
Backup key: Backup key retrieves the code only
Finishes: Silver

Zinc Alloy Combination Lock

Zinc alloy body built for outdoor and high-use mailboxes.

Best for: Landed homes, gate-side and corridor mailboxes exposed to weather.

Advantages

Zinc alloy resists Singapore humidity far better than lighter bodies
Our first choice for gate posts, pillars and open corridors
No battery compartment for water to find
Larger dials are easy to operate even with wet hands

Considerations

Heavier than the plastic-bodied models — normal for this build
Silver only, to match typical outdoor hardware
The backup key retrieves the code rather than opening the door

Not suitable when

The mailbox is fully sheltered and you want the lowest price — P2 is enough

Battery

Compact horizontal digital letterbox lock for narrow mailbox doors

Installed from: S$65
Access: Code
Power: Battery
Code digits: 4
Backup key: Per manufacturer — confirmed in writing before installation
Finishes: Black

Horizontal Digital Lock

Compact horizontal keypad for narrow or short mailbox doors.

Best for: Mailbox doors too narrow or short for a vertical keypad.

Advantages

Fits doors where a vertical keypad simply will not go
Same fast 4-digit PIN entry as P4
Compact face leaves room above and below the mail slot
Low-battery warning before it runs down

Considerations

Uses a replaceable battery
Backup key arrangements vary by batch; confirmed in writing before fitting
Black only on this model

Not suitable when

Your door has room for a vertical keypad — P4 is the more common body and spares are easier
The mailbox is fully exposed to rain

No battery

Black four-digit high-security combination letterbox lock

Installed from: S$75
Access: Code
Power: No battery
Code digits: 4
Backup key: Backup key retrieves the code only
Finishes: Black

4-Digit High Security

4-digit code, 10,000 combinations. No battery, code recovery included.

Best for: Blocks that have had mail tampering, or anyone wanting maximum codes.

Advantages

Ten times the code range of a 3-digit lock
The widest code range available without a battery
A visible deterrent in blocks that have had problems
Code can be recovered if forgotten

Considerations

Four dials take slightly longer to set than three
The backup key retrieves the code rather than opening the door
Black only on this model

Not suitable when

You want the simplest possible daily operation — P2 is quicker

No battery

Premium silver zinc-alloy four-digit combination letterbox lock

Installed from: S$85
Access: Code
Power: No battery
Code digits: 4
Backup key: Backup key retrieves the code only
Finishes: Silver

4-Digit Zinc Alloy

Our toughest build: zinc alloy, 4-digit code, code recovery.

Best for: Exposed, high-use mailboxes that also need the wider code range.

Advantages

Combines the zinc-alloy body of P6 with the 4-digit range of P8
Our longest-lasting model in exposed coastal positions
No battery, so nothing can fail in wet weather
Code recovery included as standard

Considerations

Our highest price point — the extra buys durability, not features
Silver only
The backup key retrieves the code rather than opening the door

Not suitable when

The mailbox is indoors and lightly used — P2 or P8 is better value

Compare & what it costs

Side by side, with the real installed price

One table, one number. The figure you see is the lock plus installation — nothing is added for fitting.

Showing all 9 models. Tick up to three to compare side by side.

All 9 models — the price shown includes supply **and** installation.
Model	Installed from	Access	Power	Code digits	Backup key
P1 Traditional Key Lock	S$50	Key	No battery	—	Spare key included
P2 Battery-Free Combination	S$50	Code	No battery	3	None — code only
P3 Combination + Backup Key	S$55	Code	No battery	3	Backup key retrieves your code
P4 WT Digital Touch-PIN Lock	S$60	Code	Battery	4–14	Per manufacturer — confirmed in writing before installation
P5 Ergonomic Combination Lock	S$60	Code	No battery	3	Backup key retrieves the code only
P6 Zinc Alloy Combination Lock	S$65	Code	No battery	3	Backup key retrieves the code only
P7 Horizontal Digital Lock	S$65	Code	Battery	4	Per manufacturer — confirmed in writing before installation
P8 4-Digit High Security	S$75	Code	No battery	4	Backup key retrieves the code only
P9 4-Digit Zinc Alloy	S$85	Code	No battery	4	Backup key retrieves the code only

Every price includes

Supply of your chosen letterbox lock
Removal of the old lock mechanism
Professional fitting, alignment and testing
Code set up with you, or keys handed over
Workmanship warranty on the installation

Charged separately — only if it applies

Lost-key opening+S$25 per unitOnly if the mailbox is locked and you have no key. A typical open-and-replace job therefore starts at S$75.

Urgent installation+S$10 per visitSpecial arrangement outside our planned route. Stated in writing before we travel.

Damaged or rusted doorQuoted firstRepair may be needed before any lock will seat properly.

Non-standard enclosureQuoted firstCustom, imported or landed mailboxes may need a different solution.

Jammed or seized lockFrom S$25Assessed on site and quoted in writing — often a service job rather than a replacement.

Estimates only. The written quote is the price that applies — and you pay nothing until the job is done and you have confirmed it. Full price list →

How to choose in about thirty seconds

Most people over-think this. Three questions narrow nine models to one or two.

Do you want to stop carrying a key? If yes, that rules out P1. Do you want to avoid batteries entirely? If yes, that rules out P4 and P7, leaving seven mechanical options. Do you need a way back in if the code is forgotten? If yes, skip P2 — P3, P5, P6, P8 and P9 all ship with a backup key that retrieves your code.

If the mailbox is outdoors or in a coastal estate, weight the zinc-alloy builds (P6 and P9). If an elderly resident will use it daily, P5 exists specifically for that.

What every price on this page includes

Supply of your chosen letterbox lock
Removal of the old lock mechanism
Professional fitting, alignment and testing
Code set up with you, or keys handed over
Workmanship warranty on the installation

Frequently asked questions

Common questions

How much does a letterbox lock installation cost in Singapore?

Supply and installation starts from S$50 for a standard HDB or condo letterbox. If the mailbox is locked and the key is lost, opening adds S$25 per unit, so a typical open-and-replace job starts at S$75. Digital touch-PIN models start at S$60 and the range tops out at S$85. Urgent installation adds S$10. The final price is confirmed in writing after we review your photo.

Is there a letterbox lock that does not need a battery?

Yes — most of our range. Our combination models (P2, P3, P5, P6, P8 and P9) have no battery at all, so there is nothing to charge and nothing to fail. Only the digital touch-PIN models (P4 and P7) use a replaceable battery, and those warn you before it runs low.

Can you match the existing lock on my letterbox?

In most cases, yes. Send one straight-on photo of the mailbox front and we identify the cut-out, cam type and swivel direction, then confirm in writing which model fits. If we confirm a model and it does not fit on site, you pay nothing — including no attendance fee.

How long does a letterbox lock replacement take?

Most single replacements take 15 to 30 minutes once we are on site and the mailbox is accessible. Bulk jobs for a whole block are scheduled as one coordinated visit.

More about how we work →

Send one photo, get a written price

No deposit, no card details, and nothing to pay until the lock is fitted and you have confirmed it works. We answer 24 hours.

WhatsApp a photo of your mailbox

Call +65 8341 7888