Recommended Smart Door Lock for HDB in Singapore (2026): Fire-Rated Models, Prices & HDB Rules
Quick answer:
For most HDB main doors, the best smart lock is a mid-range fire-rated push-pull model around S$800 - such as the Kaadas K9-5W or Häfele DL7600, with fingerprint, PIN, card and app access. If your door is within 3m of the lift lobby, the lock must be certified to SS 332:2018+A1:2022.
Smart Door Lock Comparison:
| Category | Model | Price Range | Lock Type | Key Features | Best For |
|---|---|---|---|---|---|
| Mid-range (Best Value) | Kaadas K9-5W | S$600–900 | Push-pull | Fire-rated, fingerprint, PIN, card, app access | Most HDB owners (safe default) |
| Mid-range (Best Value) | Häfele PP8100 | S$600–900 | Push-pull | Fire-rated, top-rated (4.9/5), reliable after-sales | Those who value proven reliability |
| Mid-range (Best Value) | Solity | S$400–600 | Push-pull | Good HDB compatibility, solid build | Budget-conscious buyers |
| Smart Home | Aqara U400 / U500 | S$300–600 | Deadbolt | Zigbee/Matter 1.5, local control, Home Assistant + Apple/Google | Smart home enthusiasts |
| Premium | Kaadas K20 Pro | S$900+ | Push-pull | 3D facial recognition, premium build | Design-forward homeowners |
| Best Bundle | Interlock Mercury | S$700–1,000 | Push-pull | Door + gate system, no mixing brands | HDB owners who want one system for door + gate |
| Rental-Friendly | Igloohome | S$400–700 | Deadbolt | Temporary PIN sharing, works without Wi-Fi | Airbnb hosts / landlords |
HDB Requirements:
Before any model choice: since 1 March 2024, if your HDB main door is a fire-rated door (required when your unit is within 3m of the lift lobby or staircase), the digital lock itself must be fire-rated and certified to SS 332:2018+A1:2022 (or EN 1634-1). Ask the installer for the Certificate of Conformity and the serial label - not just a verbal "yes, it's fire-rated." If your door isn't fire-rated, you're free to pick anything.
Also check your door is a solid/laminate door thick enough for a push-pull mortise (most HDB doors are), and budget for a gate lock separately - main door + gate bundles are how these are actually sold here.
Here's What Makes Each Smart Lock Worth Considering:
- Kaadas K9-5W: Safe default. Fire-rated, push-pull, all the unlock methods you'd actually use, and sits right in the sweet spot price-wise. You're not overthinking it.
- Häfele PP8100: You want the one with the best track record. 4.9/5 ratings and Häfele's after-sales means fewer headaches if something goes wrong.
- Solity: You want a decent push-pull lock, but don't want to spend $800. Gets the job done without the brand premium.
- Aqara U400 / U500: You're already running Home Assistant or a Matter setup and want the lock to talk to everything else in your home. Cheapest option too, but it's a deadbolt (not push-pull).
- Kaadas K20 Pro: You want face unlock so you never touch anything, and you care about aesthetics. It's the flex pick.
- Interlock Mercury: You want one installer, one brand, one system for both your main door and gate. No mixing-and-matching headaches.
- Igloohome: You're renting the place out. Temporary PINs you can generate remotely without Wi-Fi at the door are the killer feature for Airbnb/landlord use.
Personal Favourites From Home-A-Genius Team:
Based on how we operate (local Zigbee hub, multi-brand integration, unified app control), here's the honest take:
For most Home-A-Genius clients: Kaadas K9-5W or Häfele PP8100. Fire-rated, push-pull (which is what HDB doors need), and they can be integrated into H.A.G scenes via virtual integration (AVR/GVR). Your "Good Night" scene locks the door, kills the lights, sets the aircon. Done.
If the client is deep into the H.A.G ecosystem and wants native Zigbee integration, Aqara U400/U500 is actually a very suitable fit protocol-wise (Zigbee/Matter talks directly to the H.A.G gateway, no cloud hop).
But there's a catch: it's a deadbolt, not push-pull, which isn't the best fit for most HDB main doors. It is better suited as a secondary lock or for condo owners.
The real Home-A-Genius answer though?
"The lock matters less than the integration."
Any lock that supports Alexa/Google can be pulled into the Home-A-Genius platform via AVR/GVR.
In the list above:
- Aqara U400 / U500 - Google Home (via Matter), Apple Home, and Alexa via Matter. The tightest integration of the lot.
- Igloohome - Alexa (requires their Bridge accessory for remote/cloud access).
The rest (Kaadas K9-5W, Häfele PP8100, Solity, Kaadas K20 Pro, Interlock Mercury) are all app-only (proprietary Bluetooth/Wi-Fi apps). No Alexa, no Google Home, so no AVR/GVR path into H.A.G for those.
Why? (Technical explaination):
If a lock doesn't support Alexa, Google Home, HomeKit, or Zigbee/Matter, H.A.G has no path in. There's no IR or RF signal to learn (unlike aircons or fans), and those locks' proprietary Bluetooth/Wi-Fi apps don't expose any API that Home-A-Genius can hook into.
If you plan to build a connected home, the Aqara U400/U500 gives real integration. The rest are excellent "dumb-smart" locks: smart on their own, invisible to the rest of the house.
So those locks work perfectly as standalone locks (great hardware, fire-rated, all that), but they won't participate in automation scenes. No "Goodnight" scene that locks the door. No "door unlocked" trigger that turns on the hallway lights. No lock status in the Home-A-Genius app.
So the honest ranking for Home-A-Genius integration:
- Aqara U400/U500: Best. Local (Zigbee/Matter), no cloud dependency, fastest response, full automation triggers.
- Igloohome: Possible via AVR/Alexa. Works but needs the Bridge (possible add-on cost), depends on internet, slight latency.
- Cloud-dependent: commands route through Igloohome's servers → Alexa → H.A.G. If internet drops, no smart control.
- Limited automation triggers: you can lock/unlock and check status, but it's not as responsive or reliable as Aqara's local Zigbee/Matter path straight to the H.A.G gateway.
3. Everything else: No path.
At the end of the day, we would recommend picking based on your door type and fire-rating needs first, then move on to make it talk to the rest of the house regardless.
That's literally our pitch: "one app, one system, we handle the wiring between brands."