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How to Replace a Deadbolt Lock: A DIY Guide

Learn how to replace a deadbolt lock yourself with this easy-to-follow guide, improving your home security in under an hour.

F
By The FixlyGuide DeskEditorial team
8 min read
Time30–60 minutes
Cost$20–$100 (for a new deadbolt)
DifficultyEasy
Hands installing a new silver deadbolt lock on a brown wooden door with a screwdriver.
Hands installing a new silver deadbolt lock on a brown wooden door with a screwdriver.
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Tools & materials you'll need

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Tools
  • Phillips head screwdriver
    Amazon
  • Flathead screwdriver
    Optional, for prying if needed
    Amazon
  • Tape measure
    To check backset if unsure
    Amazon
Materials

As an Amazon Associate FixlyGuide earns from qualifying purchases — at no extra cost to you. Prices and availability are accurate as of publication and subject to change.

Quick Answer

Replacing a deadbolt lock is a straightforward DIY project that enhances home security. It typically involves removing two screws from the old deadbolt, pulling it out, and then installing the new one by reversing the steps. Ensure the new deadbolt's backset matches the old one for a smooth installation.

The Problem

Deadbolt locks can wear out, become difficult to operate, or you might simply want to upgrade your home's security. A faulty deadbolt can compromise safety and convenience, leading to frustration or, worse, vulnerability. This guide will walk you through replacing a standard deadbolt, ensuring your home remains secure and accessible.

Step-by-Step Fix

  1. Gather Your Tools: Before you begin, collect all the necessary tools and your new deadbolt. Having everything at hand will make the process much smoother.
  2. Remove the Interior Thumbturn: Locate the two screws on the interior side of the deadbolt. These are usually visible and hold the interior and exterior halves of the deadbolt together. Use your Phillips head screwdriver to unscrew them completely.
  3. Remove the Deadbolt Halves: Once the screws are removed, carefully pull the interior thumbturn assembly away from the door. The exterior keyed cylinder should also slide out easily from the other side. If it
FAQ

Frequently asked questions

How long does it take to replace a deadbolt?+

Replacing a standard deadbolt typically takes 15–30 minutes for an experienced DIYer, and 30–60 minutes for a beginner.

Do all deadbolts use the same size hole?+

Most residential deadbolts are designed to fit standard door preparations (2 1/8-inch bore hole and 1-inch edge bore hole). However, it's always best to check the specifications of your new deadbolt to ensure compatibility with your existing door.

Can I replace a deadbolt without changing the door handle?+

Yes, deadbolts and door handles are typically independent components and can be replaced separately. You can upgrade your deadbolt while keeping your existing door handle.

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