Smart Locks for Apartments & Rentals: No-Drill, No Permanent Install Picks (2026)

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If you rent, the best smart lock for an apartment is rarely the one with the most features — it's the one that leaves your landlord's deadbolt intact. That distinction gets blurry in most buyer guides, where "no drilling" and "keeps your original key" are treated as the same thing. They aren't.

A lock can install without touching a drill yet still replace every visible piece of hardware on the hallway side. Another can alter only the interior thumbturn and leave the exterior cylinder, keyway, and landlord's key completely unchanged. For renters, those two products have very different lease implications.

This guide separates apartment-friendly smart locks into three mechanical classes: true interior retrofits, reversible full deadbolt replacements, and single-bore lever locks for bedrooms and offices. Within each class, we look at the protocols that matter if you use Home Assistant, Apple Home, or another local-first platform — Matter over Thread, Z-Wave, Bluetooth, and vendor Wi-Fi.

If your goal is a reversible install that survives move-out without repairing a door, keep reading. We focus on the exact bore, backset, cylinder, and connectivity details that decide whether a lock actually fits — and whether it qualifies as permanent-install-free.

Quick Picks: The Right Lock for Your Door Type

The Renter-Safe Lock Classes: What "No Permanent Install" Actually Means

Before comparing products, it's worth separating three mechanical classes that the market frequently mixes together.

1. True interior retrofit. The exterior cylinder and key stay in place. Only the interior thumbturn is removed or covered. Examples: August Wi-Fi Smart Lock, Yale Approach, SwitchBot Lock/Lock Pro, Aqara U200, Nuki Smart Lock US, and the legacy Wyze Lock. These are the most landlord-friendly because the hallway side looks unchanged and the original key continues to operate.

2. Reversible full deadbolt replacement. The install can be drill-free on a standard US door, but it removes the landlord's deadbolt and exterior cylinder. Examples: Aqara U100, Yale Assure Lock 2, Kwikset Halo Touch, Wyze Lock Bolt v2. You'll need to store the original hardware and reinstall it at move-out. "No drill" does not mean "no hardware change."

3. Single-bore lever replacement. These fit a standard knob/lever bore, not a deadbolt bore. Examples: Aqara U300 and eufy C33. Many deadbolt smart locks simply will not fit a bedroom or office door with only a latch bore — this class solves that gap.

The rest of this guide works through each class, then gives you a decision framework for measuring your door, choosing a protocol, and avoiding lease problems.

True Retrofit Locks: Keep Your Landlord's Key

These are the safest starting point for renters. The original deadbolt and cylinder remain in place, so the outside of the door doesn't change. At move-out, you remove the interior unit and reinstall the original thumbturn.

Aqara U200

The U200 is the most complete renter retrofit for a local-first smart home. It combines native Matter-over-Thread with Apple Home Key, fingerprint, PIN, NFC, and your existing mechanical key.

Key specs:

• Installation: mounts over an existing single-cylinder deadbolt; no cylinder replacement or new bore
• Protocols: Thread, Bluetooth 5.1, NFC
• Interior motor power: rechargeable 7.4 V Aqara battery or AA adapter
• Keypad power: four AAA cells or 12–24 V AC/DC
• Keypad protection: IPX5; operating range -15°C to 66°C
• US backsets: 60/70 mm (2-3/8 / 2-3/4 in)
• Matter/Home Assistant: native Matter-over-Thread; Home Assistant lists U200 as a supported local-push Matter lock; no Aqara hub required when you have a Matter controller and working Thread Border Router
• Apple Home Key supported

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August Wi-Fi Smart Lock (4th Gen)

August's Gen 4 is the easiest install in this class. It replaces only the interior thumbturn, reuses the existing deadbolt screws, and requires a Phillips screwdriver. Typical installation is under 10 minutes.

Key specs:

• Dimensions: 72 mm diameter × 46 mm depth
• Power: two CR123 batteries; manufacturer cites up to about three months on the Wi-Fi model under heavy use
• Connectivity: Bluetooth/BLE plus built-in 2.4/5 GHz Wi-Fi; no August Connect bridge needed
• Supported platforms: Apple HomeKit/Siri, Alexa, Google Home
• Home Assistant: ASL-05 is explicitly supported by the Yale Access Bluetooth integration; local operation is possible over BLE
• DoorSense is optional; for a rental, use surface adhesive mounting — the flush-mount method requires a 5/8-inch drill hole

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Yale Approach

Yale's answer to the August retrofit is the Approach. It installs on the inside of the door, preserves the existing exterior lock/cylinder, and uses Bluetooth with an included Yale Connect Wi-Fi Bridge for remote access.

Key specs:

• Lock dimensions: 2.6 × 5.6 × 1.6 in
• Power: four AA batteries; Yale states up to approximately 12 months depending on use
• Variants: lock only, Wi-Fi + Keypad, Wi-Fi + Keypad Touch (fingerprint)
• Keypad: approximately 4.8 × 2.7 × 0.8 in, four AAA batteries; Keypad Touch is IPX5
• Platforms: Google Home, SmartThings, Alexa
• Matter: Yale positions Approach as upgradeable to Matter via software, but current support is not a confirmed shipping feature
• Home Assistant: not currently named in HA's supported Yale Access Bluetooth lock list, so local-only HA support is weaker than August Gen 4

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SwitchBot Lock & Lock Pro Family

SwitchBot offers two retrofit generations worth understanding separately.

Original SwitchBot Lock:

• Installation: adhesive-mounted retrofit over the existing interior thumbturn; exterior cylinder remains unchanged
• Dimensions: 111.6 × 59 × 73.2 mm; 253 g
• Power: two CR123A cells; manufacturer claim up to 180 days at ten operations/day
• Connectivity: Bluetooth 5.0
• Home Assistant: native SwitchBot Bluetooth integration supports local control without a SwitchBot Hub
• Remote access requires a SwitchBot hub when using the vendor cloud, but direct local BLE does not
• Rental note: adhesive works only if the door surface is sound and clean

Lock Pro Matter Enabled:

• Installation: renter-friendly retrofit; no new door bore normally required
• Original Lock Pro uses four AA batteries; current Matter Enabled regional versions may use dual rechargeable AB batteries
• Matter: Lock Pro Matter Enabled is advertised by SwitchBot as standalone Matter-over-Wi-Fi with no SwitchBot Hub required
• Home Assistant: SwitchBot Bluetooth integration supports Lock Pro, Lock Pro WiFi/Matter Enabled, and Lock Ultra locally
• European variants support Euro-profile, UK oval, Swiss round, and knob cylinders

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Nuki Smart Lock US (Deadbolt Version)

Nuki's US model is a purpose-built retrofit for single-cylinder deadbolts. The manufacturer explicitly promises no drilling, no wiring, unchanged exterior appearance, and removal without leaving a trace.

Key specs:

• Installation claim: under 15 minutes
• Existing physical exterior key remains usable
• Indoor use only
• Clearance requirements: inward-opening doors need deadbolt center more than 1.38 in from both frame and handle; outward-opening doors need more than 1.58 in to frame and more than 1.38 in to handle
• Connectivity: current US generation supports app access and Matter/local operation options
• Home Assistant: current Nuki Matter support exists for modern Nuki generations, but HA's named product list uses European Go/Pro/Ultra family names rather than the exact US Smart Lock (Deadbolt) label

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Legacy note: The original Wyze Lock belongs to this retrofit class, but it is sold out, depends on a proprietary Wyze gateway, and has no first-party local HA integration. We don't recommend hunting one down for a new install.

Full Deadbolt Replacements: Reversible, But Not Invisible

These locks can often install without new drilling on a standardized US door, but they replace the landlord's deadbolt and exterior cylinder. They require landlord permission, and you should bag and label every piece of the original hardware.

Aqara U100

The U100 is frequently listed as a renter retrofit, but it is a full replacement deadbolt. Aqara's own documentation says the U100 replaces your single-cylinder deadbolt. It also uses Zigbee 3.0 and Bluetooth 5.0 — not Matter-over-Thread, despite some marketplace titles suggesting otherwise.

Key specs:

• American-standard deadbolt; backsets 60 or 70 mm / 2-3/8 or 2-3/4 in
• Face bore: 54 mm / 2-1/8 in
• Door thickness: 35–55 mm / approximately 1-3/8–2-11/64 in
• Door gap: 2–10 mm
• Power: four AA batteries; claimed >8 months at eight daily unlock/auto-lock operations; USB-C emergency power
• Exterior keypad: IP65; operating range -35°C to 66°C
• Protocols: Bluetooth 5.0 + Zigbee 3.0
• Access: fingerprint, PIN, NFC, Apple Home Key/HomeKit, mechanical key
• Hub: an Aqara Zigbee hub is needed for Aqara remote ecosystem functions
• Home Assistant: U100 is not on HA's current Aqara Matter device list; U200 and U300 are

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Yale Assure Lock 2 Family

Yale's Assure Lock 2 is a full deadbolt replacement with several connectivity modules. The Z-Wave variants are the strongest local-only Home Assistant choice among full replacements.

Key specs:

• Installation: replaces the deadbolt on standard US/Canadian entry doors
• Door thickness: 1-3/8 to 2-1/4 in
• Face bore: 2-1/8 in; some models also support 1-1/2 in via adapter
• Backset: 2-3/8 or 2-3/4 in
• Base Assure Lock 2: Bluetooth
• Assure Lock 2 Touch: adds fingerprint
• Assure Lock 2 Plus: built-in Apple Home Key
• Z-Wave Touch SKU: YRD420-F-ZW3-BSP; Yale lists Z-Wave Plus and ANSI/BHMA Grade 2
• Matter: Yale references a Matter Smart Module, but broad retail availability isn't confirmed — don't assume Matter unless the exact SKU is confirmed at purchase
• Home Assistant via Bluetooth: YRD420 and YRD450 are supported by Yale Access Bluetooth
• Home Assistant via Z-Wave: best local-only route; no vendor cloud needed for ongoing operation
• Since HA 2026.6, compatible Z-Wave locks can manage users, PINs, and credentials locally

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Kwikset Halo Touch

The Halo Touch is a full replacement deadbolt with an integrated fingerprint sensor and built-in Wi-Fi. It's a common apartment roundup pick because installation is DIY, but it's not a retrofit.

Key specs:

• Traditional and Contemporary exterior variants
• Door thickness: minimum 1-3/4 in, maximum 2 in
• Cross bore: 2-1/8 in
• Backset: adjustable
• Power: four AA batteries
• Connectivity: built-in Wi-Fi; no hub required for Alexa/Google
• Protocols: no Matter, Thread, Zigbee, or Z-Wave
• Access: fingerprint, physical key, app
• Security: ANSI "AAA" performance; SmartKey rekeying

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Wyze Lock Bolt v2

The Lock Bolt v2 is a budget full-replacement deadbolt, not a retrofit. It's the product to compare against Wyze's legacy original Lock — the two should never be treated as interchangeable.

Key specs:

• v2 introduced late 2025, model WLCKB2
• Replaces an existing single-cylinder deadbolt; exterior keypad/fingerprint and interior lock are both new
• v2 dimensions: exterior 6.16 × 2.83 × 0.68 in; interior 7.09 × 2.93 × 1.41 in
• Power: eight AA batteries; claimed up to eight months at ten operations/day; USB-C emergency power
• Connectivity: Bluetooth 5.3 for setup + built-in 2.4 GHz Wi-Fi
• Weather/security: IP53; BHMA Grade 2
• Access: fingerprint, keypad/PIN, app, backup mechanical keys
• Fingerprint template data is stored locally
• No Matter, Thread, Zigbee, or Z-Wave; no official native local HA integration

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Single-Bore Lever Locks for Bedrooms & Offices

A standard interior bedroom or office door typically has a knob/lever bore, not a deadbolt bore. That makes most deadbolt smart locks useless here. Two products solve this correctly.

Aqara U300

The U300 is a single-bore smart lever that replaces a standard knob/lever and latch. It's the Aqara product that actually fits a normal bedroom or office door, far better than the U100.

Key specs:

• Form factor: smart lever/handle with latch, not a deadbolt
• Standard North American versions target the common 54 mm cross-bore and 60/70 mm latch backset
• Door thickness: 35–55 mm / 1-3/8 to roughly 2-1/6 in
• Protocols: Thread, Bluetooth 5.1, NFC
• Power: four AA batteries; USB-C emergency power
• Exterior protection: IPX4
• Access: fingerprint, touchscreen code, Apple Home Key, NFC, mechanical key, smart-home control
• Matter: native Matter-over-Thread; Aqara and Home Assistant list U300 as Works with Home Assistant with local-push control
• Local storage: current US page lists Matter user capacity 10, up to 75 codes and NFC credentials; fingerprint capacity varies by regional page revision
• Hub: Aqara store metadata says Hub Required for full Aqara platform, but standard Matter commissioning can use another Matter controller/Thread Border Router

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eufy Security Smart Lock C33

The eufy C33 is another single-bore smart lever built around a standard knob/lever bore. It's simpler than the U300 but relies on eufy's Wi-Fi service for remote access.

Key specs:

• Installation: full single-bore lever/latch replacement
• Cross bore: approximately 2-1/8 in / 54 mm
• Backset: 2-3/8 or 2-3/4 in / 60 or 70 mm
• Door thickness: approximately 1-3/8 to 2-1/6 in / 35–55 mm
• Works with left- and right-hand doors
• Direct built-in Wi-Fi; no HomeBase required for normal remote access
• Access: adaptive fingerprint reader, keypad/passcodes, eufy encrypted NFC cards, physical key, app
• Capacity: up to 50 fingerprints and 100 passcodes
• Power: eight AA batteries; manufacturer claims up to eight months; USB-C emergency power
• Exterior protection: IP53; BHMA certification listed by eufy
• No Matter, Apple HomeKit, or IFTTT; Alexa/Google Assistant supported
• No official local HA route; fingerprints/PINs work locally, but app features depend on eufy's Wi-Fi service

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How to Choose Without a Permanent Install

Use the following checks before buying any apartment smart lock.

1. Identify the bore type. Is the existing hardware a deadbolt or a knob/lever? True retrofits and full deadbolt replacements require a deadbolt bore. Bedroom/office doors with only a latch bore need a single-bore lever like the U300 or C33.

2. Measure your door. For US deadbolts, the common measurements are a 2-1/8-inch/54-mm face bore, 2-3/8 or 2-3/4-inch/60 or 70-mm backset, and roughly 1-3/8 to 2-1/4-inch door thickness. But these are not universal: the Kwikset Halo Touch, for example, specifies a narrower 1-3/4 to 2-inch door-thickness range.

3. Check the lease and local fire/egress rules. Mechanically reversible does not automatically mean contractually permitted. Even a true retrofit that leaves the exterior unchanged can violate a building policy or fire-safety rule. Get permission in writing when in doubt.

4. Treat adhesive as reversible, not magically mark-free. Paint condition, varnish, heat, and long-term adhesive exposure can all affect removal. Use surface adhesive mounting for keypads and sensors; avoid screw-mounted plates and flush DoorSense holes if the lease forbids drilling.

5. For European cylinders, check the emergency function. A retrofit motor that leaves a physical key inserted internally should normally use an emergency-function/double-clutch cylinder so the exterior key still operates. This is critical for Aqara U200/U200 Lite, Nuki, and SwitchBot-style products on Euro cylinders.

6. Verify the wireless protocol for your platform. The Home Assistant compatible smart locks guide covers this in detail. In short:

• Matter-over-Thread: Aqara U200 and U300 are first-party verified local HA products. You need a Matter controller and working Thread Border Router, not necessarily the vendor hub.
• Z-Wave: Yale Assure Lock 2 Z-Wave variants give a clean vendor-cloud-free path. Since HA 2026.6, you can manage lock users and PINs locally.
• Bluetooth: August Gen 4 and SwitchBot locks can operate locally in HA, but adapter placement, encryption keys, and Bluetooth proxies matter.
• Vendor Wi-Fi: eufy C33, Kwikset Halo Touch, and Wyze Lock Bolt v2 offer convenient remote access but substantially weaker local HA stories.

7. Diagnose the network before blaming the lock. Most Matter commissioning failures are IPv6, mDNS, or Thread Border Router topology issues, not lock defects. If Home Assistant can't see a Matter lock, start with the Matter integration and your router's multicast settings before factory-resetting hardware.

8. Don't let a motor hide mechanical friction. A smart lock should not be expected to compensate for a deadbolt that already rubs the strike plate. Alignment problems increase noise, jams, and battery drain. Fix the mechanical fit first.

Comparison Table

Frequently Asked Questions

Conclusion

The safest smart lock for a rental is a true interior retrofit: it preserves the landlord's cylinder and key, leaves the hallway side unchanged, and removes cleanly at move-out. The Aqara U200 is the strongest overall pick in that class for local-first smart homes, combining native Matter-over-Thread, Apple Home Key, and genuine mechanical reversibility. If you want the fastest install and already run HomeKit, Alexa, or Google Home, the August Wi-Fi Smart Lock 4th Gen is easier to set up but gives up Matter and Thread.

For a bedroom or office door with a knob/lever bore, skip the deadbolt products entirely and choose the Aqara U300 if you want local Matter control, or the eufy C33 for a simpler Wi-Fi lever.

Whichever class you choose, measure the bore, backset, and door thickness against the lock's spec sheet, confirm the protocol against your smart home platform, and get landlord approval before touching the hardware. Reversible installs are about more than avoiding drill holes — they're about preserving the door exactly as you found it.

For more context, see our guides on smart lock installation and retrofit compatibility, smart locks that work with Google Home, Ring, and Apple HomeKit, and the best smart locks of the year across every door type. If you're building out a local-first rental setup, start with Home Assistant compatible smart locks.