Best Smart Locks for Existing hardware reuse

Existing hardware reuse Decision Dashboard

Best for Existing hardware reuse

Yale August Smart Lock

4.7 attribute score

Highest scored product for this attribute based on supporting review evidence.

Safest pick

SwitchBot Lock Ultra

4.5 attribute score

Balances the attribute score, supporting reviews, and overall product strength.

Best overall product

Aqara UWB Smart Lock U400

4.4 overall score

Strongest overall product among items with scored evidence for this attribute.

#1 Yale August Smart Lock
4.7

Keeping the outside hardware and existing deadbolt was repeatedly praised, especially for renters, maintenance access, and preserving exterior appearance.

Pros: Installation and Setup, App

Cons: Battery

#2 SwitchBot Lock Ultra
4.5

Reviewers liked that the retrofit design keeps existing exterior hardware, keys, and deadbolts, making it renter-friendly and low-modification.

Pros: Installation and Setup, Industrial design

Cons: Hub requirement, Auto-lock

#3 eufy Video Smart Lock E330
4.5

Existing hardware reuse scored well in the one clear opinionated case, where the lock worked with an existing strike plate and the reviewer called that nice.

Pros: Camera and doorbell performance, Installation and Setup

Cons: Keyway quality, Door compatibility (deadbolt fit)

#4 Kwikset Obsidian Smart Lock
4.5

Existing hardware reuse was a strength in the replacement scenario, where the reviewer installed it easily after removing a prior Kwikset lock.

Pros: Guest Codes and Access, Industrial design

Cons: User access management, Value and Price

#5 Aqara UWB Smart Lock U400
4.2

One reviewer valued that the lock could mount without the kind of door drilling required by the previous lock, making the install feel friendlier to existing doors.

Pros: Battery, Smart-home integration (Alexa, Google, Siri, HomeKit, Matter, Thread)

#6 Yale Approach Smart lock
4.1

Reviewers generally liked keeping exterior hardware and existing keys, especially for renters, though one questioned whether the retrofit concept justified the extra hardware and effort.

Pros: Installation and Setup, Value and Price

Cons: Keypad, Auto-lock

#7 Aqara Smart Lock U100
4.0

One reviewer reused an existing strike plate successfully, suggesting some prior hardware can work when the bolt alignment is already right.

Pros: Fingerprint, Value and Price

Cons: Hub requirement, Battery

#8 Google Nest x Yale Smart Lock
3.1

Existing hardware reuse was inconsistent: one install kept the doorknob, while others noted the lock replaces more hardware or required a new handle/backplate changes.

Pros: Installation and Setup, Value and Price

Cons: Voice control, Smart-home integration (Alexa, Google, Siri, HomeKit, Matter, Thread)

#9 ULTRALOQ Bolt Fingerprint Smart Lock
3.0

Existing hardware reuse was mixed: one reviewer thought reusing the old strike would save time, but that choice made installation take longer.

Pros: Fingerprint, Installation and Setup

#10 Tapo Smart Door Lock DL110
2.8

Existing strike reuse was a weakness in one hands-on review because the tester had to adjust the strike plate before the lock behaved correctly.

Pros: App, Guest Codes and Access

#11 Level Lock+ Smart Lock
2.7

Because Lock+ replaces the full deadbolt, reviewers noted less reuse of existing keyed hardware and more friction when trying to keep old keys.

Pros: Installation and Setup, Industrial design

Cons: Value and Price, Door compatibility (deadbolt fit)

#12 Schlage Encode Smart Lock
2.5

One review treated hardware reuse as a drawback because Encode replaces the whole deadbolt instead of modifying the existing one.

Pros: Installation and Setup, App

Cons: Battery, Locking motor