How to Install a Deadbolt Lock

If your exterior door only has a knob lock, your home is vulnerable. Knob locks can be defeated in seconds with a credit card or a simple kick. A deadbolt is the single most effective upgrade you can make to secure any entry door, and installing one yourself is a realistic weekend project. For Los Angeles homeowners, especially in neighborhoods like Echo Park, Silver Lake, Highland Park, and parts of the San Fernando Valley where package theft and break-ins have been rising, adding a deadbolt to your front or back door is a smart investment that costs under $80 in parts.

In this guide, we will walk you through how to install a deadbolt on a door that does not already have one. We will cover the tools you need, the step-by-step process, and when it makes sense to call a professional instead. If your door or frame also needs attention, check out our door and window repair service for help with warped frames, sticking doors, and damaged jambs.

What You Need Before You Start

Before you begin the deadbolt installation, gather these tools and materials. Most are available at any hardware store in LA, including Home Depot, Lowes, or your local Ace Hardware.

Tools:

• A power drill with a fresh battery
• A 2 1/8-inch hole saw (for the door face hole)
• A 1-inch spade bit or Forstner bit (for the edge bore hole)
• A chisel (1 inch wide) and hammer
• A pencil and tape measure
• A Phillips head screwdriver

Materials:

• A deadbolt lock set (Grade 2 or Grade 1 for best security)
• The installation template included with the lock
• Masking tape

Most deadbolt kits come with a paper template, all necessary screws, and a strike plate. You should not need to buy anything extra beyond the lock and the drill bits.

Step 1: Choose the Right Location

The standard placement for a deadbolt is 6 to 12 inches above the existing door knob. This is both ergonomic and structurally sound because it places the bolt in a solid section of the door stile. Measure carefully and mark the center point on the edge of the door with a pencil.

Tape the paper template that came with your deadbolt to the door, aligning it with your center mark. The template shows exactly where to drill both holes.

Step 2: Drill the Face Bore Hole

Using the 2 1/8-inch hole saw, drill through the face of the door at the template mark. This is the most important step to get right.

1. Start drilling from the inside of the door at medium speed. Apply steady pressure but do not force it.
2. Drill until the pilot bit just pokes through the other side of the door. Stop immediately.
3. Walk to the other side of the door and finish drilling from that side. This prevents the wood from splintering around the hole.
4. Clean out any wood debris from the hole.

Pro tip: If you are working with a metal door (common in LA apartments and condos), you will need a bi-metal hole saw and cutting oil. Metal doors take longer to drill and generate more heat. Go slowly and let the bit cool between passes.

Step 3: Drill the Edge Bore Hole

Switch to the 1-inch spade bit. Drill straight into the edge of the door at the template mark until you reach the face bore hole. Keep the drill perfectly level. If you angle the bit, the bolt will not extend straight and the lock will not function properly.

Insert the bolt assembly into the edge bore hole to test the fit. It should slide in snugly. If the hole is too tight, drill it out slightly.

Step 4: Mortise the Bolt Plate

With the bolt assembly inserted, trace the outline of the bolt plate (also called the faceplate) onto the edge of the door with a pencil. Remove the bolt assembly, then use a chisel and hammer to create a shallow mortise so the plate sits flush with the edge of the door.

1. Score along the pencil outline with the chisel, tapping lightly with the hammer.
2. Make a series of shallow cuts across the mortise area.
3. Clean out the wood to a depth of about 1/8 inch, matching the thickness of the plate.
4. Test fit the bolt assembly. The plate should sit flush or just barely below the surface.

Step 5: Install the Deadbolt Assembly

1. Insert the bolt assembly into the edge bore hole and secure the faceplate with the included screws.
2. Insert the exterior cylinder (the keyed side) through the face bore hole from outside the door. Make sure the tailpiece bar passes through the slot in the bolt assembly.
3. Attach the interior thumb turn assembly from inside the door, aligning it with the mounting holes on the exterior cylinder.
4. Secure both halves together with the long mounting screws provided. Tighten evenly, alternating between screws, until the assembly is snug against the door. Do not overtighten.
5. Test the lock. Turn the thumb turn and the key several times. The bolt should extend and retract smoothly.

Step 6: Install the Strike Plate

The strike plate is just as important as the lock itself. A deadbolt is only as strong as the strike plate holding it in the frame.

1. Close the door and mark where the bolt meets the door frame.
2. Drill a 1-inch hole about 1 inch deep into the frame at that mark. This is the pocket the bolt slides into.
3. Hold the strike plate over the hole and trace it. Chisel a mortise so the plate sits flush.
4. Screw the strike plate in place. For maximum security, replace the short screws that came with the kit with 3-inch screws that reach into the wall stud behind the frame. This is the single most important security upgrade you can make — short screws only grip the door jamb, which can split easily during a kick-in attempt.

Choosing the Right Deadbolt Grade

Deadbolts are rated by the ANSI/BHMA grading system. Here is what each grade means for your home security:

• Grade 3 — Basic residential security. Acceptable for interior doors or low-risk areas. Costs $15 to $30.
• Grade 2 — Standard residential security. Good for most LA homes. Withstands more force than Grade 3. Costs $25 to $60.
• Grade 1 — Commercial-grade security. The strongest option available. Recommended for ground-floor apartments, homes in higher-crime areas, or anyone who wants maximum protection. Costs $50 to $80.

We recommend Grade 2 as the minimum for any exterior door in Los Angeles. Brands like Schlage and Kwikset offer reliable Grade 2 deadbolts at most local hardware stores.

DIY vs Professional Installation Costs

Method	Lock Cost	Labor Cost	Total
DIY (Grade 2 deadbolt)	$25 – $60	Free	$25 – $60
DIY (Grade 1 deadbolt)	$50 – $80	Free	$50 – $80
Handyman installation	$25 – $80	$150 (first hour)	$175 – $230
Locksmith installation	$25 – $80	$100 – $200	$125 – $280

If you already own a drill and hole saw, the DIY route saves you $100 or more. But if you do not have the tools or are not confident drilling through your door, hiring a handyman is the safer and faster option. Curious about overall handyman pricing in the area? Read our guide on handyman costs in Los Angeles.

When to Call a Professional

While deadbolt installation is a manageable DIY project, there are situations where professional help makes sense:

• Metal or fiberglass doors — These require special drill bits and techniques. A bad cut on a metal door cannot be patched easily.
• The door frame is rotted or damaged — A deadbolt installed in a weak frame provides no real security. The frame needs to be repaired or reinforced first. Our door repair service handles this.
• You need multiple deadbolts installed — If you are upgrading all exterior doors at once, a handyman can do the entire job in a single visit and often at a lower per-door cost.
• You want a smart lock or electronic deadbolt — These require additional wiring or setup and benefit from experienced installation.
• You rent your home — Check your lease first. Many LA landlords will install a deadbolt if requested, as California law requires adequate locks on rental properties.

At GoldKey Repairs, we install deadbolts and handle all types of general repairs for Los Angeles homeowners and renters. Our pricing is simple: $150 for the first hour and $85 for each additional hour, plus the cost of parts. Most single deadbolt installations take well under an hour. Call us at (323) 630-9115 to schedule a visit.