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Retrofit smart locks can upgrade your existing door’s lock mechanism without changing the door or any external hardware.
They combine traditional physical access (keys) with modern conveniences like fingerprint detection, keypad, mobile-app control, and remote access.
Many retrofit locks are designed for easy DIY installation, making them ideal for renters, frequent movers, or anyone looking for smart security on a budget.
Not everyone wants to or can replace their entire door lock or hardware - including renters or individuals living in older homes. Retrofit smart door locks shine here, they can be installed or replaced on the back of the current deadbolt or lock hardware, leaving the exterior appearance unchanged and even using the same key if needed. Retrofit smart door locks for 2025 are a versatile, safe, and economical option to modernize your home without renovation.
The following are the best retrofit smart door locks that can be looked into at the moment:
Switchbot Smart Lock is a retrofit that converts an existing deadbolt into a smart lock, without replacing the lock or the door. It allows remote locking and unlocking features, compatible with any smart home assistant (e.g., Alexa, Google Home, or Siri) via a hub. This lock does not require significant hardware modifications, making it particularly suitable for older apartments and rented houses.
Also read: Cool home security gadgets you can try now
QUBO Smart Door Lock provides a top level security, thanks to its strong stainless steel construction and multiple locking bolts. It offers multiple authentication options, timed and guest access codes. It also has additional features such as password alerts, child lock, and an emergency USB battery backup, making it a well-suited, retrofit-friendly device for families or shared homes.
The Yale YDME 50 NxT Smart Door Lock is a trusted option delivering reliable performance and security in the retrofit segment. Featuring keyless entry, touchpad unlock, app control, and a modern aluminium building, this Yale model brings an upgrade for any household with a combination of both old-fashioned keypad/key access and smart features (e.g., remote access monitoring or keyless entry).
Atomberg SL 1 Smart Door Lock is a retrofit-style model with multiple unlocking methods via a digital keypad or fingerprint. With a sleek design, it is suitable for modern doors, while the ergonomic handle and illuminated keypad simplifies your daily key access while needing to enhance security measures.
Also read: Best smart home gadgets with voice control
Ozone Smart Wi-Fi Door Lock is a retrofit-friendly option with Wi-Fi connectivity, enabling remote lock/unlock through app-based control. This lock allows users to manage access away from home, delivering convenience like never before.
The best smart door locks in 2025 come with a powerful combination: they modernize security and convenience without replacing entire locks or doors. If you are searching for a rent-friendly solution that works with your current setup, SwitchBot Smart Lock or Atomberg SL 1 can be the best picks.
On the other hand, if your priorities include security, multiple access methods, and guest code control, the QUBO Smart Door Lock is the right choice. For trusted brand reliability and balanced access to both old and new, Yale YDME 50 NxT is your top way to go.
1. What makes a lock “retrofit”?
A retrofit smart lock is a replacement for the internal mechanism of the existing deadbolt/lock.
2. Can retrofit smart locks support fingerprint or keypad access?
Yes, it is possible to unlock many retrofit models using different ways, like keypad pins, fingerprint detection, physical keys, and so on.
3. Are retrofit smart locks good for renters?
Absolutely; retrofit locks are ideal for renting spaces since they require no significant alterations to the doors or frames, making these models well-suited for properties where external alterations are not permitted.
4. Do they need electricity or wiring?
No, most retrofit smart locks are battery-operated and do not require wiring; the installation process is rather simple and non-invasive.
5. Can I still use a traditional key?
Yes, most retrofit locks are capable of offering smart entry and traditional key access (there is a backup in the case of battery failure or electronics failure).
