How to Replace a Doorknob

Whether your doorknob is wobbly, outdated, or simply will not latch anymore, replacing it is one of the simplest home repairs you can tackle. If you live in an older Los Angeles home — and there are thousands of pre-war bungalows, mid-century ranch houses, and 1970s apartment buildings across the city — worn-out doorknobs are practically inevitable. The good news is that you do not need any special skills to change a door knob. A screwdriver and 20 minutes is all it takes.

This guide covers how to replace a doorknob on interior and exterior doors, explains the differences between passage, privacy, and keyed entry knobs, and helps you decide when to call a pro. If your door also has alignment or hinge problems, check out our door and window repair service for help with more involved fixes.

Types of Doorknobs: Passage, Privacy, and Keyed

Before you buy a replacement doorknob, you need to know which type you have. Choosing the wrong one means a return trip to the hardware store.

• Passage knobs — No locking mechanism at all. These are used on hallway doors, closets, and pantries. They turn freely from both sides.
• Privacy knobs — Feature a simple push-button or twist lock on the interior side. Used on bedroom and bathroom doors. They can be unlocked from the outside with a small pin or flathead screwdriver in an emergency.
• Keyed entry knobs — Lock with a key from the outside and typically have a thumb-turn on the inside. These are used for front doors, back doors, side entries, and garage access doors. In Los Angeles rental properties, landlords are required to provide functioning locks on all exterior doors.

Most new doorknobs are sold as either passage, privacy, or keyed entry. The packaging will clearly state which type it is. If you are replacing an exterior doorknob, consider upgrading to a knob-and-deadbolt combo for better security — especially common in older LA neighborhoods like Echo Park, Silver Lake, and Highland Park where original hardware may be decades old.

Tools and Materials You Need

• New doorknob set (matching your door type)
• Phillips-head screwdriver
• Flathead screwdriver
• Measuring tape (to check backset distance)
• Pencil (if adjusting the strike plate)
• Chisel (only if the new strike plate is a different size)

One important measurement before you shop: the backset. This is the distance from the edge of the door to the center of the bore hole. Standard backsets are either 2-3/8 inches or 2-3/4 inches. Measure yours before heading to the store. Most replacement knobs are adjustable to fit either size, but it is worth confirming.

Step-by-Step: How to Replace a Doorknob

These steps work for most standard residential doorknobs, including those found in LA apartments, condos, and single-family homes.

Step 1: Remove the Old Doorknob

1. Look for visible screws. Many doorknobs have two screws on the interior side of the rose plate (the round plate against the door). Remove these screws and pull both knob halves apart.
2. No visible screws? Look for a small slot or detent on the neck of the knob. Press it with a flathead screwdriver or a pin while pulling the knob off. Then pry off the rose plate to reveal hidden mounting screws. Remove those screws and separate the two halves.
3. Remove the latch. Pull out the two screws holding the latch plate on the edge of the door. Slide the latch assembly out.

Step 2: Install the New Latch

1. Slide the new latch assembly into the bore hole from the edge of the door. Make sure the angled side of the latch bolt faces the direction the door closes.
2. Secure the latch plate with the provided screws. If the new plate does not fit perfectly in the mortise (the recessed area on the door edge), you may need to widen it slightly with a chisel.
3. Adjust the backset on the latch if needed. Most modern latches have a sliding mechanism that switches between 2-3/8 and 2-3/4 inches.

Step 3: Attach the New Knobs

1. Insert the exterior knob (or the keyed side) through the bore hole first, feeding the spindle through the latch assembly.
2. Align the interior knob onto the spindle and line up the screw holes with the mounting posts.
3. Tighten the mounting screws evenly. Alternate between the two screws so the knob seats squarely. Do not overtighten — the knob should turn freely without wobbling.
4. Snap on the rose plate covers if your knob uses them.

Step 4: Check the Strike Plate

1. Close the door and test the latch. It should click into the strike plate on the door frame smoothly.
2. If the latch does not align with the strike plate opening, remove the old strike plate and install the one that came with your new knob. You may need to enlarge the mortise with a chisel or fill old screw holes with wooden toothpicks and wood glue before driving new screws.
3. Test the door several times. Open, close, and lock it from both sides to confirm everything works.

Interior vs. Exterior Doorknobs: Key Differences

The installation process is nearly identical for interior and exterior doorknobs, but there are a few things to keep in mind:

• Exterior knobs are heavier duty. They use thicker materials and more robust latch mechanisms. If you are installing a keyed entry knob on a front door, make sure the deadlatch (the small plunger next to the latch bolt) engages the strike plate properly. This prevents someone from using a credit card to jimmy the latch.
• Exterior knobs should be weather-resistant. Look for finishes rated for exterior use. In coastal LA areas like Santa Monica and Venice, salt air corrodes cheap hardware quickly.
• Consider a deadbolt. A doorknob lock alone is not sufficient security for an exterior door. If your door does not already have a deadbolt, this is a good time to install one. Drilling a new deadbolt bore hole requires a hole saw and some precision, which is where a handyman can help.

Common Problems in Older LA Homes

Los Angeles has some of the oldest housing stock in the western United States. If your home was built before 1970, you may run into a few complications when replacing a doorknob:

• Non-standard bore holes. Older doors sometimes have bore holes smaller or larger than the modern standard of 2-1/8 inches. You may need a hole saw to enlarge it.
• Thin or thick doors. Standard doorknobs fit doors that are 1-3/8 to 1-3/4 inches thick. Some vintage LA homes have thicker solid-wood doors that require knobs with longer spindles or spacer kits.
• Warped door frames. Settling is common in older foundations. If your door frame has shifted, the latch may not align with the strike plate no matter what knob you install. This is a door alignment issue that may require professional attention.
• Rental property rules. If you rent in LA, check your lease before swapping exterior hardware. Many landlords require you to use their approved locksmith or return original hardware when you move out.

DIY vs. Professional Cost Comparison

A single doorknob replacement is a straightforward DIY job. But if you need to replace knobs on multiple doors, add deadbolts, or deal with non-standard doors, hiring a handyman is more efficient. Most pros can swap out three to four doorknobs in an hour. For more on what handyman services cost in the area, see our handyman cost guide for Los Angeles.

When to Call a Handyman

Replace the doorknob yourself if it is a simple swap on a standard door. Call a professional if:

• You need a new bore hole drilled — This requires a hole saw, a steady hand, and precise measurement. A mistake means a damaged door.
• The door frame is damaged or warped — A new knob will not fix a structural problem. The frame may need to be shimmed, planed, or replaced.
• You are installing a smart lock or electronic entry — These require additional wiring or precise cutouts that go beyond a basic knob swap.
• You want to replace all exterior hardware for security — A handyman can handle knobs, deadbolts, and strike plate reinforcement in a single visit.

At GoldKey Repairs, we handle doorknob replacements and all types of door hardware work for Los Angeles homeowners and renters. Our pricing is transparent: $150 for the first hour and $85 for each additional hour, plus the cost of parts. A single doorknob replacement typically takes 15 to 20 minutes, so we can tackle several knobs or combine it with other small repairs in a single visit. Call us at (323) 630-9115 to schedule.