How to Install a Deadbolt Lock on a Door: A Beginner’s Guide
Many homeowners prefer the DIY route for simple upgrades, so we’ve put together clear steps to follow. Whether you’ve just moved in or you’re replacing an older lock, this guide will walk you through how to install a deadbolt safely and correctly — even if you’re new to this kind of work. That said, there are situations where calling a professional might be the better choice — and we’ll cover those, too.
Tools You’ll Need for Deadbolt Installation
Before getting started, it’s a good idea to gather everything you’ll need in one place — no one likes running back and forth mid-project. Here’s what you’ll typically need to install your deadbolt with confidence:
- Deadbolt kit (usually includes the lock, strike plate, screws, and a paper template)
- Power drill with a hole saw bit (about 2⅛ inches — roughly the size of a ping pong ball)
- 1-inch spade bit for drilling into the edge of the door
- Screwdriver
- Tape measure and pencil
- Chisel (for making a neat recess for the bolt and faceplate)
If you’re not sure which type of deadbolt to choose, a single-cylinder model is a solid, homeowner-friendly option — it uses a key on the outside and a thumb turn on the inside, making it both secure and easy to use.
Step-by-Step: How to Install a Door Lock and Deadbolt Like a Pro
Let’s walk through the process of deadbolt installation so you can handle it safely and clearly — without the guesswork.
- Measure and Mark. Measure 6 to 12 inches above your existing door handle and mark where the deadbolt will go. Use the paper template from your kit to line up the holes precisely.
- Drill the Main Hole. Using the hole saw bit, drill through the face of the door at your mark. Take it slow to keep the hole clean and centered.
- Drill the Edge Hole. On the edge of the door, use a 1-inch spade bit to drill for the bolt. This hole should connect with the one from the previous step.
- Fit and Chisel. Insert the bolt into the edge hole to check the fit. Then, trace around the faceplate and carefully chisel the area so the plate sits flush with the door.
- Attach the Lock. Align the inside and outside pieces of the deadbolt and secure them with screws. Make sure they sit evenly on both sides of the door.
- Add the Strike Plate. Close the door and mark where the bolt meets the door frame. Drill pilot holes and chisel a shallow recess so the strike plate fits evenly. Use long screws to anchor it into the frame securely.
By following these steps, you’ll know exactly how to put a deadbolt lock on a door in a way that feels sturdy, aligned, and dependable.
Still, some doors — especially metal ones — might require a few adjustments or specialized tools. If you’re looking for details on how to install a deadbolt lock on a metal door, check out our dedicated guide for tips on drill bits, mounting methods, and more.
Wrapping Up
For homeowners who feel comfortable with basic tools, learning how to install a deadbolt can be a helpful step in keeping their home protected. This guide offers everything you need for a smooth DIY deadbolt installation, but it’s also okay if it feels like more than you want to take on.
If you’d rather leave the tools aside and let an expert handle the job, a licensed mobile locksmith can come right to your door and take care of everything with care and precision.
Sure Lock & Key is here when you need us — with reliable service and a team that treats your home like their own. Feel free to reach out anytime!