What is the best type of lock for a patio door?

The best lock for a patio door depends on the door style and the level of security you want. Many patio doors come with a basic handle lock, but adding a dedicated patio door security lock can significantly improve protection. These locks prevent the door from being forced or lifted from the track. For sliding doors, track locks or bolt-style security locks are common, while French doors often benefit from additional surface-mounted locks. Choosing a lock designed specifically for patio doors ensures it fits correctly and provides stronger resistance against forced entry.

Do patio doors need extra security locks?

Standard patio door handles usually include a basic locking mechanism, but many homeowners choose to add extra security locks for additional protection. Extra locks can prevent the door from sliding open or being forced from outside. They are especially useful for ground-floor doors or conservatory entrances, which can be common entry points during burglaries. Installing a secondary patio door security lock provides an extra barrier and helps make the door more resistant to forced entry without needing to replace the entire door system.

Can you add a security lock to an existing patio door?

Yes, most patio doors can have additional security locks fitted without replacing the door. Many patio door security locks are designed to be installed onto existing doors using simple fixings. These locks work alongside the existing handle lock and provide extra reinforcement. They can help prevent lifting, sliding, or forced entry attempts. When choosing a lock, it’s important to ensure it is compatible with the door type, such as sliding patio doors, French doors, or conservatory doors.

What locks are suitable for French patio doors?

French patio doors usually rely on a central handle lock and internal shoot bolts, but additional security locks can improve protection. Surface-mounted locks designed for French doors can secure both doors together and make it harder for intruders to force them open. Some locks also prevent the doors from being pried apart. Adding a dedicated security lock designed for French doors can strengthen the door’s overall resistance to forced entry while still allowing normal use. For more advice on improving double door security, you can also read our guide on how to secure your French doors.

Are conservatory doors secure enough with standard locks?

Conservatory doors often use similar locking systems to standard patio doors, but the level of security can vary depending on the door type. While the built-in handle lock provides basic protection, adding a dedicated security lock can make the door much more secure. Conservatories are sometimes targeted because they may provide easier access to the main house. Installing an additional conservatory door lock helps reinforce the door and provides an extra layer of protection against forced entry.

Best Patio Door Locks for French Doors & Conservatories (2026)

Best Patio Door Security Locks for French Doors & Conservatories (UK Guide)

The short answer

For uPVC French and conservatory doors, the quickest upgrade is a lock that clamps both handles together so they can't be turned from outside. For most homes we recommend our Home Secure Patio Door Lock: it clips on in seconds with no tools, and it's our best seller. If you want the highest security, choose the Patlock, which is Secured by Design approved.

Got sliding patio doors? These handle locks won't fit, so give us a call and we'll suggest the right lock. And whichever lock you choose, make sure your door's euro cylinder is anti-snap.

French doors and conservatories bring light and style to your home — but they can also be a target for intruders. Large panes of glass, central handles, and easy access points make them vulnerable if not secured properly.

Browse our full patio door security collection for locks, euro cylinders and restrictor stays to protect French doors, conservatories and sliding patio doors.

One simple, cost-effective way to add extra protection is with the Home Secure™ Patio Door Security Lock — a quick-fit solution that offers both a visible and physical deterrent without damaging your doors.

Our top picks

Best for most homes

Home Secure Patio Door Lock 4.9 (16 reviews) £19.99

Clamps both handles together so they can't be turned
Clips on in seconds — no tools, no drilling
Our best seller — over 5,000 sold in the last year

Choose this if: you want a quick, affordable deterrent you can put on and take off in seconds.

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Highest security

Patlock£69.99

Secured by Design approved
Supplied with 2 tamper-resistant handle spindles
Holds the doors shut without relying on the lock, so snapping the cylinder won't open them

Choose this if: your French doors are the main way in at the back and you want the strongest option.

View the Patlock

For inward-opening French doors

Sash Jammer 5.0 (6 reviews) £3.99

Adds a second lock to each door
Screws to the frame inside, swings over the door
Two per door, top and bottom

Choose this if: your French doors open inwards and you want a second lock on each door. Not for sliding or outward-opening doors.

View sash jammers

Upgrade the lock itself

Avocet ABS Euro Cylinder 5.0 (63 reviews) £44.99

TS007 3-star anti-snap protection
Replaces the cylinder in your French door's main lock
The cylinder we've recommended for over 10 years

Choose this if: your doors have a standard euro cylinder without anti-snap protection.

Choose your size

Will it fit your doors?

Both handle locks are made for hinged French and conservatory doors with a handle on each door. Check the gap between your handles against the fit guide on the product page, or send us a photo and we'll tell you which one fits.

Check the fit guide Call 0151 521 8089

4.8 from 1,000+ reviews
Same-day dispatch, order by 2pm
Trade counter in Aintree, Liverpool
5,000+ patio locks sold last year

Home Secure Patio Door Lock vs Patlock

Feature	Home Secure Patio Door Lock	Patlock
Our verdict	Best for most homes	Highest security
Security	Visible deterrent, locks handles together	Secured by Design, tamper-resistant spindles
Customer rating	★ 4.9 (16)	New
Fitting	Clips on, no tools	Swap 2 handle spindles (screwdriver)
Fits	Most straight double-door handles	Most uPVC French doors
Price	£19.99	£69.99
Shop	View	View

Swipe the table sideways to compare.

Which one would we fit?

For most homes, our own patio door lock does the job. It's a strong visible deterrent, it's affordable, and it comes off in seconds when you want to open the doors. That's why it's our best seller, with over 5,000 sold in the last year.

If your French doors are the main way into the back of the house, or you've had a break-in before, we'd fit a Patlock. It costs more and takes a few minutes to fit, but it's the most secure option we sell. Not sure? Send us a photo of your doors and we'll help you choose.

The Home Secure team

🔍 Why French Doors Can Be a Security Weak Spot

Intruders often see French and patio doors as an easy entry point due to:

Large glass areas
Weak or worn locking systems
Handles that can be forced open from outside

Adding an additional lock significantly reduces the risk and increases peace of mind.

🔐 The Patio Door Security Lock – Instant Protection

If your French doors use a euro cylinder lock, make sure it has anti-snap protection.

A standard cylinder can be snapped in seconds — upgrading to a TS007 3-Star anti-snap euro cylinder is one of the most effective security improvements you can make. Browse our euro cylinder locks.

Our Home Secure™ Patio Door Security Lock works by securing both handles together, preventing them from turning and opening the door.

No drilling required – fits in minutes.
Visible deterrent – discourages attempts before they happen.
Universal fit – suitable for most French and conservatory doors.
Stylish design – blends with your existing décor

🌐 Shop the Patio Door Security Lock →

Secure your French doors today

Clips over both handles in seconds — no tools or drilling. £19.99.

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🛠 Easy, Tool-Free Installation

You don’t need to be a DIY expert to fit this lock. Simply:

Position the lock over both handles.
Secure it in place using the built-in mechanism.
Lock it with the included key for maximum security.

Instructional image showing how to operate a Home Secure door lock. Step 1: Slide to open using the black switch, shown in a close-up image labeled 'Open/Close.' Step 2: Place the lock over door handles and click into place

✅ Key Benefits at a Glance

Quick installation – no tools needed
Prevents handle movement entirely
Acts as a strong visual deterrent
Ideal for holiday homes, rental properties, and ground floor doors
Easily removable if not needed

Doors blowing open in the wind?

A restrictor stay stops French doors swinging too far and damaging handles and hinges. £9.99.

View the stay

🔗 Pair with Other Security Solutions

For the best protection, combine the Patio Door Security Lock with:

High-security Euro cylinder locks
uPVC door restrictor stays
Window security devices for adjoining windows

🔒 Expert Advice for Complete Home Protection

If you’re looking to make sure your security upgrades align with national safety recommendations, the UK Fire and Rescue Service provides helpful advice on balancing burglary prevention with safe home-exit planning. Their insights cover how to position locks, doors, and escape routes to ensure security never compromises safety. You can read more at UK Fire and Rescue Service – Home Safety Advice

❓ Frequently Asked Questions

Q: Will it fit my French or patio doors?
A: The lock is designed to fit most standard double-handle French and conservatory doors.

Q: Can I use it on sliding patio doors?
A: No — it’s intended for hinged double doors with handles.

Q: Will it damage my door?
A: No drilling or permanent fixings are required — it’s completely non-invasive.

Compatibility guide for Home Secure door lock. Text reads: 'Will fit majority of straight double door patio handles.

Want the strongest option?

Compare every lock, stay and cylinder we sell for French, patio and conservatory doors.

Shop patio door security

🏠 Boost Your Door Security Today

The Home Secure™ Patio Door Security Lock is a fast, affordable way to protect your home and deter unwanted visitors.

If your French doors open inwards, a pair of sash jammers on each door, top and bottom, adds a second lock. Sash jammers only work on doors that open inwards, so they don't suit sliding patio doors or doors that open outwards. For those, call us on 0151 521 8089 and we'll suggest the right lock.

👉 Order yours today →

Ready to secure your patio doors? Browse our full range of patio door security locks
and accessories, with fast 2-day UK delivery.

For a complete overview of all our door locks and security products — including front
door locks, multipoint mechanisms and window security — visit our high security door
locks collection.

Check out the featured products from this article below 👇 Including UPVC Door Restrictor Stay

View all patio door security

Best Patio Door Security Locks for French Doors & Conservatories (UK Guide)

Our top picks

Home Secure Patio Door Lock vs Patlock

🔍 Why French Doors Can Be a Security Weak Spot

🔐 The Patio Door Security Lock – Instant Protection

🛠 Easy, Tool-Free Installation

✅ Key Benefits at a Glance

🔗 Pair with Other Security Solutions

🔒 Expert Advice for Complete Home Protection

❓ Frequently Asked Questions

🏠 Boost Your Door Security Today

Helpful guides

TS007 3-Star Euro Cylinders: What the Rating Means and Which to Buy

How to Fit a Sash Jammer to uPVC Doors, Windows and Letterboxes

How to Fit a uPVC Door Restrictor Stay (French & Patio Doors)

How to Measure a Euro Cylinder Lock (UK Size Guide)

FAQ