How to Install a Keyless Door Lock: Easy DIY Instructions

If you're upgrading your home security or simplywant the convenience of keyless entry, learning how to install a keyless door lock is a valuable DIY skill. This guide walks you through everything you need to know, from preparation to installation steps and signs that it’s time to call a professional. Whether you're replacing an old lock or installing a new system altogether, the process can be straightforward with the right tools and guidance.

Before You Begin

Before starting the installation, gather all necessary tools and materials. Most keyless door lock kits include the main components, but you’ll also need common household tools like:

Phillips head screwdriver
Level
Chisel and hammer
Tape measure
Drill

Key considerations before installation:

Check door compatibility: Ensure your door’s thicknes (many kits work for standard 1⅜″–2⅙″ doors) and borehole size match the lock’s requirements.
Prepare the workspace: Remove the old lock and clean the area around the borehole.
Read the instructions: Each manufacturer may have unique steps or wiring requirements. Always review the manufacturer’s manual before starting.
Have new batteries ready: Most keyless locks run on batteries, so install fresh ones from the start.

Door compatibilityrequirements of eufy smart door lock

How to Install a Keyless Door Lock: General Steps

Installing a keyless door lock is usually straightforward. Below is a clear, step-by-step walkthrough that explains not just what to do, but why each step matters.

Step 1: Remove the Old Lock

Open the door, then unscrew the interior side of the old deadbolt.
Pull off both the inside and outside halves of the old lock.
Remove the latch mechanism from the edge of the door.
Unscrew and take off the strike plate from the door frame.
Check if the bore holes are clean, the door frame isn’t damaged, the old latch hole lines up properly, the door thickness and previous hardware alignment are good.

Step 2:Install the New Latch

Adjust the latch length if your lock allows backset adjustment.
Slide the latch into the cutout on the door edge. Make sure any “UP” arrows or markings face the correct direction.
Screw the latch into place firmly, but don’t overtighten.
On the door frame, position the new strike plate and make sure the bolt lines up with the center of the opening.
Screw the strike plate into the frame. For better security, use the longer screws provided so they reach the structural framing.
A properly installed latch is crucial — if it sits crooked, the bolt will rub or jam later.

Step 3: Attach the Exterior & Interior Hardware

Hold the keypad (exterior piece) on the outside of the door.
Feed any cable or tailpiece through the center hole so it reaches the inside.
Place the support plate or mounting bracket on the inside of the door, making sure the cable is not pinched.
Connect the wire from the outside keypad to the connector on the interior plate (most electronic locks use a simple plug-in connector).
Secure the inside and outside assemblies using the provided screws.
Before tightening fully, double-check that the lock sits straight and the keypad feels solid.

Step 4: Install Batteries & Program the Lock

Open the battery compartment inside the lock and insert fresh batteries.
The lock will typically beep or light up to indicate power.
Test the lock by using the default code included with your manual.
Enter programming mode and create your personal access code.
Add any extra codes for guests or family members.
Snap the battery cover or interior plate cover back on.
If your lock connects to WiFi or Bluetooth, this is also the time to pair it with its app.

Step 5: Test the Lock Thoroughly

Do all testing with the door open first, just in case something misaligns.
Enter your code to extend and retract the bolt.
Turn the interior knob/lever to confirm smooth movement.
Close the door and check that the bolt slides into the strike plate without catching.
If the bolt rubs or fails to seat, adjust the strike plate slightly until movement is smooth.

Step 6: Final Tips & Maintenance

Replace batteries at least once a year or when the lock gives a low-battery warning.
Keep a backup physical key (if your model includes one) in an accessible place.
Clean the keypad gently—avoid harsh cleaners.
Update your access codes occasionally for better security.

When to Call a Professional

You may need professional help if:

Your door has non-standard measurements or needs drilling adjustments.

The lock’s wiring is complex, especially for smart locks that connect to existing security systems.

The latch doesn’t align properly, even after adjustments.

You’re unsure about programming or connecting the lock to Wi-Fi or smart home hubs.

Why Consider the eufy Smart Lock Series

If you’re looking for a smart lock that balances ease of installation, usability and modern features, eufy’s lineup is worth a look. Our smart locks offer multiple unlocking methods (app, keypad, fingerprint/biometric depending on model) and strong integration with home-control systems.

For instance, the eufy FamiLock S3 Max delivers advanced biometric security with palm-vein ID and 2K HDR video, while the Video Smart Lock S330 enhances convenience with lightning-fast fingerprint unlocking, built-in video doorbell capabilities, and app-based monitoring without monthly fees.

Conlsuion

Now that you understand how to install a keyless door lock, you’re better equipped to take control of your home’s security and convenience. This project is totally doable with a bit of patience and the right tools. And if you’re considering a new smart lock, models like the eufy FamiLock S3 Max and Video Smart Lock S330 make it easy to enjoy modern access features without complicating the installation process.

FAQs

How much to install a keyless entry door lock?

Typical installation costs for a keyless entry or smart door lock (including materials and labor) range from about $200 to $400 in the U.S., with variations based on lock type and complexity. For simpler installations (just swapping a lock) the cost might fall closer to the $150-$300 range.

Are keyless door locks easy to install?

Yes. Many keyless door locks are designed for DIY installation. They often fit existing deadbolt holes and can be installed in under an hour with basic tools. That said, complexity rises if your door is non-standard, wiring is involved, or you’re integrating smart home features, in which case a pro may be advisable.