By James Walker Ā |Ā Home Automation & Security
Quick Answer: Smart locks can support home security by eliminating lost-key risks, enabling remote access control, and creating visible deterrents. However, they work best as part of a layered security plan ā not as a standalone solution. No lock, smart or traditional, can guarantee prevention of a determined break-in.
If you’ve been wondering whether upgrading to a smart lock is worth it from a security standpoint, you’re asking exactly the right question. Smart locks have become one of the most talked-about products in home automation ā and one of the most misunderstood. Some manufacturers hint that they’re the future of home security. Critics point out that any lock can be bypassed with enough effort. The truth, as usual, sits in the practical middle.
In this article, I’ll walk through how smart locks actually work, what the research and practical experience suggest about their deterrence value, where they genuinely help, where they fall short, and how to set one up properly so you’re getting real security benefits ā not just tech for its own sake.
Burglary Deterrence
Home Access Control
Smart Home Integration
Lock Buying Guide
ā ļø Disclaimer: This article is for general educational and purchasing guidance only. It does not guarantee security outcomes or replace advice from a licensed installer, electrician, or security professional. Some installations may require licensed electrical work or local permit compliance. Always check your local building codes and consult a qualified professional when needed.
What Is a Smart Lock and How Does It Work?
A smart lock is an electronic door lock that replaces or supplements a traditional keyed deadbolt. Instead of ā or in addition to ā a physical key, it lets you lock and unlock your door using a smartphone app, a keypad PIN, a fingerprint scanner, a key fob, or even voice commands through a connected assistant like Amazon Alexa or Google Home.
Most smart locks use Wi-Fi, Bluetooth, Z-Wave, or Zigbee to communicate with your phone or smart home hub. Some use a combination ā Bluetooth for close-range control when you’re right outside the door, and Wi-Fi or a hub for remote access from anywhere. The core deadbolt or latch mechanism is still a physical lock; the “smart” layer sits on top of it as a motor and control board.
š Note: Most smart locks are designed to retrofit onto your existing deadbolt ā they replace the interior hardware only, leaving the exterior cylinder untouched. This means installation usually doesn’t require a locksmith. However, some models require specific door thicknesses or deadbolt types, so always check compatibility before buying.
š§ Smart Lock Setup Flow (Typical Retrofit Installation)
This reflects a typical DIY retrofit workflow. If your door frame is damaged, your deadbolt is non-standard, or your building is rented, consult a locksmith or your property manager before proceeding.
Do Smart Locks Deter Burglars? The Honest Answer
The question of whether smart locks deter burglars depends heavily on what type of intrusion you’re trying to prevent and how the lock is used. From a practical standpoint, smart locks may help in several meaningful ways:
š No More Lock Bumping or Key Copying
Smart locks that replace the exterior cylinder eliminate traditional vulnerabilities like bump keys or unauthorized key duplication. Access is code- or app-based, which makes casual copying impossible.
š² Remote Locking and Monitoring
Forgot to lock up? With a Wi-Fi-connected smart lock, you can lock your door from anywhere. You also receive real-time alerts if someone unlocks the door or if it’s left open ā something a traditional lock can never tell you.
šļø Visible Tech Can Be a Deterrent Signal
Some burglary-prevention research suggests that visible security technology ā including cameras, alarm panels, and electronic locks ā may signal to opportunistic intruders that a home is actively monitored. This is not a guarantee, but it’s a plausible contributing factor.
š Access Logs Show Who Came and Went
Smart locks record every entry event with a timestamp. This access log can be useful for identifying unauthorized entries, supporting insurance claims, or providing information to law enforcement after an incident.
That said, it’s equally important to understand where smart locks have real limitations when it comes to deterring burglars. Most residential break-ins ā particularly opportunistic ones ā don’t involve picking or bypassing a lock at all. Forced entry through a kick-in, a window, or an unlocked secondary door is far more common. A smart lock on your front door won’t address those vulnerabilities directly.
Smart Lock vs. Traditional Deadbolt: Security Feature Comparison
The Layered Security Approach: Where Smart Locks Fit Best
Security professionals consistently recommend a layered approach to home protection. No single product ā including a smart lock ā operates effectively in isolation. Think of home security like an onion: the more layers a potential intruder has to get through, the less attractive the target becomes.
A smart lock contributes most to deterrence when paired with other active measures. For example, a home with a visible doorbell camera, motion-activated lighting, a monitored alarm system, and a smart lock on the front door presents a much more complex obstacle than any one of those elements alone. Smart locks deter burglars most effectively as part of this kind of coordinated setup.
š Home Security Layer Priority Meter (Practical Guidance ā Not Scientific Data)
This is a practical priority guide based on general security principles. It does not represent tested research data or guarantee specific outcomes for any home.
Privacy and Cybersecurity Risks of Smart Locks
One aspect that competitors often undercover is the privacy trade-off that comes with smart locks. Because these devices connect to your home network and often to manufacturer cloud servers, they introduce a cybersecurity dimension that traditional locks simply don’t have.
The most common vulnerabilities include weak default passwords, unencrypted Bluetooth signals, outdated firmware, and accounts without two-factor authentication. These aren’t reasons to avoid smart locks entirely ā but they are reasons to set them up carefully.
ā ļø Warning: Do not use a smart lock with the manufacturer’s default password or PIN. Change all default credentials immediately during setup. A lock with a guessable or default code provides essentially no more security than an unlocked door. Use a strong, unique 6ā8 digit PIN that isn’t based on birthdays, addresses, or repeated digits.
Smart Lock Problems: Likely Causes and What to Check
Privacy Settings and Data Security Best Practices
Beyond physical security, smart locks collect and transmit data. Entry logs, timestamps, app usage, and sometimes even location data are handled by the manufacturer’s servers. For most homeowners this is acceptable, but it’s worth knowing what you’re agreeing to.
š Smart Lock Privacy Decision Path
ā Yes: Review the manufacturer’s privacy policy. Check whether data is encrypted in transit and at rest. See if you can delete logs on demand.
ā No / Local only: Lower data exposure risk, but ensure the hub storing data locally is secured with a strong password.
ā Yes: Use a unique strong password and enable two-factor authentication (2FA). Do not reuse passwords from other services.
ā No account required: Verify the lock still receives firmware updates over time.
ā Yes: Consider placing smart home devices on a separate IoT network segment or guest VLAN to limit exposure if the device is ever compromised.
ā Uses hub/Z-Wave/Zigbee: Secure the hub’s admin password and keep its firmware updated.
ā Regularly: Enable automatic updates when available.
ā Rarely or unclear: Research the manufacturer’s support lifecycle before purchasing. A smart lock with abandoned firmware support is a long-term security liability.
For general guidance on smart home device security, CISA provides useful consumer resources at cisa.gov ā Connected Devices / IoT Security.
Safe Setup vs. Risky Setup: What Makes the Difference
In my testing experience, the single biggest factor separating a well-secured smart lock installation from a vulnerable one isn’t the brand ā it’s the setup choices the homeowner makes. The same lock model can be quite secure or surprisingly exposed depending on how it’s configured.
Safe Setup vs. Risky Setup: Side-by-Side Comparison
š”ļø Safety Note: Always keep a physical key backup somewhere secure ā with a trusted neighbor, in a fireproof lockbox elsewhere in the home, or with a family member ā in case the smart lock’s battery dies completely or the app is unavailable. Do not hide a key under a mat or planter near the door. This defeats the purpose of any lock.
Which Smart Lock Type Fits Your Home?
Smart locks come in several form factors and connection types. Choosing the right one depends on your living situation, technical comfort level, and whether you’re renting or own your home. The table below breaks down which type may fit best for common scenarios.
Smart Lock Type by Home Setup and User Situation
Common Mistakes When Using Smart Locks for Security
When setting up smart locks for the first time, many homeowners unknowingly reduce their effectiveness. Understanding what not to do can be just as valuable as knowing best practices.
Common Smart Lock Mistakes vs. Better Choices
š© Red-Flag Checklist: Signs Your Smart Lock Setup May Need Attention
What Experienced Smart Home Users Check That Beginners Often Miss
Beyond the basics, users who have managed smart locks for several years develop a set of habits that beginners rarely think about at first. These don’t require any special knowledge ā just awareness of how smart locks behave over time.
š Proactive Battery Management
Experienced users replace batteries when the app reports 20ā30% remaining ā not when the lock stops working. Some set a calendar reminder every 6 months regardless of battery level. Use brand-name alkaline batteries, not off-brand or rechargeable cells, which can drain unevenly.
š Access Code Audits
Periodically review the full list of active access codes. Most users accumulate codes for cleaners, dog walkers, delivery services, and house sitters ā and forget to delete them. A quarterly review of active codes reduces long-term access risk without much effort.
š Door Frame Health
A smart lock is only as strong as the door frame around it. Experienced users periodically check that the strike plate is properly seated, that the screws haven’t loosened, and that the door sits flush in the frame ā especially after seasonal temperature changes that cause wood to expand or contract.
š Integration Audit
If a smart lock is connected to Alexa, Google Home, or a hub, experienced users periodically verify that those integrations still function correctly ā especially after app or platform updates. A broken integration can silently disable auto-lock or remote access without any error notification.
š” Tip: Set a recurring monthly reminder to open your lock’s app, check battery level, verify all active codes, and confirm auto-lock is still enabled. This 2-minute check prevents the most common smart lock security lapses. The FTC offers general smart home privacy guidance at consumer.ftc.gov ā Smart Home Devices.
Smart Locks Worth Considering for Home Security
The products below are included because they’re commonly used, well-reviewed, and relevant to the topics covered in this article. They may support home security routines when set up correctly, but no lock can guarantee protection from forced entry or determined intrusion.
Schlage Encode Plus Smart WiFi Deadbolt
A full deadbolt replacement with built-in Wi-Fi and Apple Home Key support. May support home security routines with keypad entry, built-in alarm technology, and remote locking ā no hub required.
August Wi-Fi Smart Lock (4th Gen)
An interior-only retrofit that attaches to your existing deadbolt thumb turn ā ideal for renters or homeowners who want to keep their existing exterior cylinder. May make daily monitoring easier with auto-lock, entry alerts, and voice assistant compatibility.
š Smart Lock Fit by Home Type (Practical Reference Guide)
Apartment / Renter
Interior retrofit lock ā minimal installation, easy removal, no structural modification
Single-Family Home
Full deadbolt replacement with keypad and remote access for best versatility
Short-Term Rental
Keypad with scheduled codes ā issue and expire guest codes without being present
Smart Home Ecosystem
Z-Wave or Zigbee lock compatible with SmartThings or Home Assistant for hub automation
Always verify door compatibility and building/lease permissions before purchasing. Renters should confirm with landlords before making any modifications.
š§ When to Contact a Professional
- Your door frame is damaged, warped, or the deadbolt doesn’t seat correctly ā a locksmith can assess and repair before installation.
- The existing deadbolt requires rewiring or your door needs a hardwired electronic lock ā contact a licensed electrician.
- You’re in a multi-unit building with a shared entryway ā check with your HOA or building manager before modifying door hardware.
- You want to integrate your smart lock into a professionally monitored alarm system ā consult the monitoring company about compatible devices.
- You experience repeated unauthorized access attempts or security concerns ā contact local law enforcement, not just the lock manufacturer.
Frequently Asked Questions
Do smart locks actually deter burglars, or are they just convenient?
Smart locks can contribute to deterrence, especially by eliminating key-copying risks, enabling auto-lock, and signaling that a home uses active monitoring technology. However, they are most effective when used as part of a layered security approach ā combined with cameras, lighting, and an alarm system. No single device can guarantee that a home will not be targeted.
Can smart locks be hacked remotely?
Like any internet-connected device, a smart lock is theoretically vulnerable if it uses a weak password, outdated firmware, or an unencrypted connection. In practice, targeted remote hacking of residential smart locks is uncommon, but the risk can be reduced significantly by using a strong unique account password, enabling two-factor authentication, and keeping firmware updated.
What happens if the battery dies on my smart lock?
Most smart locks provide low-battery alerts in the app before the battery fully dies. When the battery is completely depleted, many models allow temporary power via a 9-volt battery held against external terminals, enabling one-time entry. Always keep a physical key backup stored off-site or with a trusted person in case the battery fails unexpectedly.
Are smart locks safe for renters to install?
Interior-only retrofit smart locks ā those that attach to the existing thumb turn without replacing the exterior cylinder ā are typically renter-friendly because they don’t permanently alter the door or lock. Always check your lease agreement and get written permission from your landlord before installing any lock hardware, even a reversible model.
Do smart locks work without Wi-Fi?
Yes ā most smart locks with a keypad or Bluetooth functionality can still be operated locally if Wi-Fi is unavailable. You would lose remote access and entry notifications, but the physical keypad or a paired phone nearby via Bluetooth would still allow entry. Some models also retain a physical key slot for full offline backup.
How often should I change my smart lock PIN?
A general best practice is to update your main access PIN every 3ā6 months, and immediately any time you part ways with someone who knew the code ā such as a former house cleaner, partner, or contractor. Time-limited codes for guests should be deleted as soon as access is no longer needed, rather than left active indefinitely.
Do smart locks work with all door types?
Most smart locks are designed for standard single-cylinder deadbolts with a 2-3/8″ or 2-3/4″ backset on doors 1-3/8″ to 1-3/4″ thick. They may not fit fiberglass doors with specialty latches, doors with non-standard cross-bores, or apartment security doors with multi-point locking systems. Always check the compatibility specifications for the specific model before purchasing.
Final Thoughts
Smart locks offer real, practical advantages over traditional deadbolts ā particularly the ability to monitor entry remotely, eliminate key-copying vulnerabilities, issue and revoke access codes without changing hardware, and ensure auto-locking when you forget. Whether smart locks deter burglars directly is a question with a nuanced answer: they contribute to a deterrence-friendly environment, but they are most effective as one part of a broader home security strategy.
The lock itself matters less than how it’s configured, maintained, and supported by the security layers around it. A well-set-up smart lock on a reinforced door frame, paired with a camera and a monitored alarm, represents a meaningfully more secure home than any individual product alone.
For complex installations ā including hardwired locks, multi-unit buildings, or integration with professional alarm monitoring ā consult a licensed locksmith, electrician, or security professional. Review your local building codes before making any permanent modifications to door hardware.