How to Fit a Door Handle
Replace an interior door handle by identifying the type, measuring the backset and spindle, then fitting and testing before final tightening.
Quick answer
Remove the old handle and measure the backset and spindle hole. Buy a replacement that matches. Insert the latch, feed the spindle through, attach both handles, tighten finger-tight, test the action, then tighten fully.
A loose or broken door handle is a quick fix if you measure first. The three common types are lever on rose, lever on backplate, and knob or mortice. Identify what you have, check the sizes, and fit methodically.
What you’ll need
- replacement handle set
- tape measure
- hacksaw
- metal file
- screwdriver set
- pencil
Step by step
- 1
Identify your handle type and measure
Remove the old handle. Measure the backset — the distance from the door edge to the centre of the spindle hole. Standard backsets are 44 mm and 57 mm. Check the spindle hole diameter and the spindle length. Write these down before you buy a replacement.
- 2
Buy a matching replacement
Take your measurements to the shop. Ensure the new handle is the correct handing — left or right — so the lever drops the right way when fitted. For hollow-core doors, check that the fixing screws are not too long.
- 3
Fit the latch if needed
If you are replacing the latch too, insert it into the door edge so the faceplate sits flush. Screw the faceplate down. For a new installation, mark and drill the spindle hole and latch recess first.
- 4
Attach the handles
Slide the spindle through the latch. Place both handles on either side of the door. Insert the fixing screws and tighten finger-tight only. Check that the lever action is smooth and the latch retracts fully when pressed.
- 5
Test before final tightening
Close the door and check the latch engages cleanly. Open and close the handle ten times. If the action binds, loosen the screws, realign, and retest. Once everything moves freely, tighten the screws fully. If the spindle is too long, cut it to length with a hacksaw and file the end smooth.
If you are fitting a handle on a fire door, the hardware must be fire-rated and the original fixing method must be maintained. Do not alter the door's integrity or remove intumescent seals. If you are unsure whether your door is a fire door, check for a certification label on the door edge or frame, or consult a building professional before proceeding.
Common mistakes
- Fitting the handle without first testing that the latch retracts and returns smoothly — a misaligned spindle can leave the door unable to latch.
- Stripping the fixing screws by using too large a screwdriver bit — always match the bit size to the screw head exactly.
- Forgetting to check that the new handle set is handed correctly before fitting, then discovering the lever drops the wrong way.
Frequently asked
Do I need to turn off anything before fitting a door handle?
No. Fitting a door handle does not involve electricity, water, or gas. You only need to clear the area so the door can stay open while you work.
My new handle feels loose even after tightening — what should I check?
Check that the spindle is not too long, preventing the handles from pulling together. Check that the screws are the correct length for your door thickness. Tighten in a diagonal pattern so the backplate or rose sits flat against the door.
Can I fit a handle on a hollow-core door the same way as a solid door?
Yes, but use shorter screws or the fixing bolts supplied with the handle. Long screws can punch through the thin face of a hollow-core door. Some handles come with bolts that pass all the way through and tighten from both sides — these are ideal for hollow doors.
Questions about this guide
No questions yet — be the first to ask one and we’ll help you out.
Comments
No comments yet. Start the conversation.
Did this guide help?
Did you try this?
Help others by sharing how it went.
Show your result
Tried this guide? Share a photo of how it turned out.