Smart lock for renters: options that leave no trace
Updated
A retrofit lock keeps your landlord’s key working and comes off with a screwdriver. Here is how to check your lease, your door and your ecosystem before you buy.
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Start with the lease, and ask in writing
Most leases forbid alterations or lock changes without the landlord’s consent, and landlords generally need a way in for repairs and emergencies. Rules differ by state and city, so read the clauses on alterations, locks and access before buying anything.
A retrofit lock is the easiest request to approve because the exterior key still works and nothing is drilled. Send a short e-mail: the type of lock, that it uses the existing deadbolt and screw holes, that the original thumbturn will be reinstalled at move-out and that the current key keeps working. A written yes protects your deposit.
If you have a disability and need a smart lock to open your door, the Fair Housing Act gives you a right to make reasonable modifications at your own expense; the landlord can ask you to restore interior changes at the end of the tenancy where that is reasonable.
Which type of smart lock fits a rental
| Type | What changes | Typical price | Rental fit |
|---|---|---|---|
| Retrofit (interior only) | Interior thumbturn replaced; exterior cylinder and key unchanged | $100–$280 | Usually the easiest to get approved |
| Thumbturn turner (clamp or adhesive) | Nothing removed; a motor turns your existing thumbturn | $50–$130 | No hardware change, but bulkier and less robust |
| Full replacement deadbolt with keypad | Whole deadbolt swapped; new keys | $90–$300 | Landlord needs a key or code: ask first |
| Smart lever or handleset | Knob or lever replaced | $150–$350 | For doors without a deadbolt; ask first |
Never install anything on a shared building entrance, and do not change the mailbox or common-area locks.
Check your door in five minutes
- Deadbolt type. Retrofit locks need a single-cylinder deadbolt: a key outside, a thumbturn inside. If there is a keyhole on both sides (double cylinder), do not install a lock that keeps it that way: the residential building code requires egress doors to be openable from inside without a key or special knowledge, which matters in a fire.
- Room around the thumbturn. Retrofit bodies are often 2 to 3.5 inches across. Measure the distance to the door frame, the trim and the handle below; a handle set close to the deadbolt is the most common fit problem.
- Door thickness and backset. Most US exterior doors are 1-3/4 inches thick and deadbolts have a 2-3/8 or 2-3/4 inch backset. Compare with the maker’s supported range, especially on thick or thin doors.
- Bolt alignment. Lock the deadbolt with the door closed. If you must push or pull the door to turn it, a motor will stall and drain batteries. Ask maintenance to adjust the strike plate first.
- Mortise locks. Older apartment buildings often have a mortise lock: a rectangular body set inside the door with a single faceplate. Standard retrofit and deadbolt smart locks do not fit; look for models made for mortise locks, and expect to need the landlord’s approval.
Bluetooth, Wi-Fi or Matter over Thread
Bluetooth only works when your phone is near the door: fine for keyless entry, no remote access or alerts. Built-in Wi-Fi gives remote access without a hub but drains batteries faster. Many locks use Bluetooth plus a plug-in Wi-Fi bridge, a good compromise.
Matter over Thread locks work with Apple Home, Google Home, Alexa, SmartThings and Home Assistant, and keep working locally if the internet drops. They need a Thread border router at home, a role that many recent smart speakers, displays and streaming boxes already fill; check that your controller supports Matter door locks. See Matter vs Zigbee for how the protocols differ.
Batteries, auto-lock and the codes you share
Most smart locks run on four AA batteries or a rechargeable pack, and apps warn you well before they run out. A retrofit lock keeps the physical key as a backup, which is a real advantage on the day the batteries die; some keypad locks also accept emergency power through a USB-C port or a 9 V battery.
Set auto-lock with a short delay so you are not locked out while carrying groceries, and be careful with auto-unlock by geofence: phones can trigger it while you are inside near the door. Give guests their own codes, with schedules for dog walkers or cleaners, and delete them when they no longer need access.
Security follows the FTC’s basics: a unique password for the lock account, two-factor authentication, firmware updates and removing access for people who no longer need it.
Move-out checklist
- Delete all user codes and shared access in the app.
- Remove the lock from your account and factory-reset it, so it is not linked to you or your next home.
- Reinstall the original thumbturn, tailpiece and screws from the bag you kept.
- Test the deadbolt with the landlord’s key from outside and the thumbturn from inside.
Shop by need
Single-cylinder deadbolt, landlord key must keep working
What to look for: retrofit design that keeps the exterior cylinder, auto-lock, door-position sensor, supported door thickness range
Typical price: $100–$280
See options on AmazonApple Home, Google Home or mixed household
What to look for: Matter over Thread retrofit lock, compatible Thread border router at home, physical key backup
Typical price: $130–$280
See options on AmazonGuests, dog walkers and cleaners
What to look for: wireless keypad paired with your lock, scheduled codes, weather rating for an exposed door
Typical price: $30–$80
See options on AmazonOlder building with a mortise lock
What to look for: smart lock made for mortise locks, compatibility with your cylinder and faceplate size, landlord approval
Typical price: $250–$450
See options on AmazonFrequently asked questions
Can my landlord refuse a smart lock?
Usually yes, if the lease forbids lock changes or alterations, except where a reasonable modification for a disability applies. A retrofit lock that keeps the existing key is the easiest request to approve; ask in writing.
Do I have to give my landlord a code?
With a retrofit lock the landlord’s existing key still works, so usually not. With a full replacement deadbolt, expect to provide a key or a code, as the lease will typically require access.
What happens if the Wi-Fi or internet goes down?
You can still unlock with the physical key, and usually with Bluetooth or a keypad. Remote access and notifications stop until the connection returns. Matter over Thread locks keep working with local controllers in the home.
Will a retrofit lock damage the door?
No new holes are drilled: it uses the existing deadbolt and its screws. Clamp or adhesive thumbturn turners can leave residue; test the adhesive on a hidden spot first.