How to Replace a Door Handle and Lock (Step-by-Step Guide + Costs UK 2026)

A Practical DIY Guide for Homeowners, Landlords & Property Managers

Replacing a door handle or lock is one of the most common property maintenance jobs. Whether you’re upgrading security, fixing a faulty handle, or refreshing a property between tenants, it’s a task that can often be done quickly — if you know how.

But should you do it yourself, or call a professional?

At AA Facilities Group, we replace and install locks and handles daily, and in this guide we cover:

• Step-by-step DIY instructions

• Tools and materials needed

• Real UK costs

• When to hire a professional

🔧 What You’ll Need

Tools:

• Screwdriver (Phillips/flathead)

• Tape measure

• Drill (for new installations)

• Chisel (if adjustments needed)

Materials:

• New door handle set

• Latch or lock mechanism

• Screws (usually included)

🚪 Step-by-Step: Replacing a Door Handle

Step 1: Remove the Old Handle

• Unscrew the handle plates

• Pull handles apart

• Remove spindle (the bar through the door)

Step 2: Remove the Latch

• Unscrew the latch plate on the edge of the door

• Slide the latch out

Step 3: Install the New Latch

• Insert new latch into door edge

• Ensure the angled side faces the correct direction

• Screw into place

Step 4: Fit the New Handles

• Insert spindle through latch

• Attach handles on both sides

• Screw handles tightly into place

Step 5: Test the Handle

• Open and close the door

• Check latch movement

• Ensure smooth operation

🔐 How to Replace a Door Lock (Euro Cylinder)

Step 1: Locate the Fixing Screw

• On the edge of the door, in line with the lock

Step 2: Remove the Cylinder

• Unscrew fixing screw

• Insert key and turn slightly

• Pull cylinder out

Step 3: Install New Cylinder

• Insert new lock

• Align cam (internal mechanism)

• Screw into place

Step 4: Test the Lock

• Lock and unlock several times

• Ensure smooth operation

💰 Cost to Replace Door Handles & Locks (UK)

DIY Costs

• Door handle: £10 – £50

• Latch/lock: £5 – £30

• Euro cylinder lock: £10 – £60

👉 Total DIY cost:£20 – £100

Professional Costs

• Labour per door: £50 – £100

• Lock replacement: £70 – £150

⚖️ DIY vs Professional Installation

Factor	DIY	Professional
Cost	£20–£100	£50–£150
Difficulty	Easy–Medium	Easy
Time	30–60 mins	15–30 mins
Finish	Depends on skill	Professional

⚠️ Common Mistakes to Avoid

• Installing latch backwards

• Misaligning handle holes

• Over-tightening screws

• Choosing wrong lock size

• Not testing before finishing

👉 These can lead to sticking doors or faulty locks.

🔥 When You Should Hire a Professional

Call a professional if:

• Door needs drilling or resizing

• Lock is jammed or broken internally

• It’s a fire door (must remain compliant)

• You want a perfect finish

🏠 Landlord Tip

Replacing handles and locks is one of the quickest upgrades between tenancies:

• Improves security

• Freshens up property appearance

• Low cost, high impact

👉 Many landlords replace locks as standard between tenants.

⏱️ How Long Does It Take?

• DIY: 30–60 minutes per door

• Professional: 15–30 minutes per door

Why Choose AA Facilities Group?

At AA Facilities Group, we provide:

• Door handle and lock replacement

• Emergency lock repairs

• Fire door compliant installations

• Full property maintenance

✅ Fast response times✅ Competitive pricing✅ Landlord & residential specialists✅ High-quality finish

📞 Get a Free Quote Today

Need your door handles or locks replaced?

👉 Contact AA Facilities Group today for a free, no-obligation quote.

We’ll ensure your doors are secure, functional, and professionally fitted.