Best Nightlatch Lock for Front Doors: 2025 Expert Review
DR Joinery
Expert Joiner & Door Specialist
Choosing the right nightlatch (often called a 'Yale lock') is about more than just security; it is about finding a mechanism that operates smoothly even when your timber door swells in the damp Yorkshire winter.
Many homeowners in York assume all nightlatches are the same, but fitting the wrong size or a cheap mechanism can lead to jammed locks and security vulnerabilities. In older properties where frames are rarely square, the quality of the internal components matters immensely.
In this review, I'll compare three locks I encounter frequently on site: a reliable budget standard, a high-security narrow option, and a solid problem-solver with a generous warranty.
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Specs vs. The Real World
The Spec: "Insurance Approval"
"Many people believe a nightlatch is sufficient for home insurance requirements."
Most insurance policies require a 5-lever Mortice deadlock conforming to BS3621. A nightlatch is usually considered 'secondary' security unless it specifically meets British Standards.
The Spec: "Universal Fit"
"Packaging often claims 'easy replacement' for existing locks."
The critical measurement is the 'backset' (distance from door edge to keyhole centre). Standard is 60mm, but many narrower doors use 40mm. If you buy the wrong size, you will have ugly holes to fill and re-drill.
My Top 3 Recommendations
Three options to cover different needs and budgets
Yale P-77-ENB-PB-60 - Traditional Nightlatch - 60mm - Electro Nickel Brass Finish
Yale
This is the classic 'Yale lock' design that has secured front doors for decades. It is a reliable, no-nonsense option perfect for secondary security on a timber front door or for securing a shared house bedroom.
The Good
- Tried and tested mechanism from a heritage brand
- Internal snib allows you to hold the latch back (handy when bringing in shopping)
- Includes anti-bump protection
The Bad
- Standard security level (likely needs a deadlock for insurance)
- Finish is basic compared to solid brass options
Installer Tip:
This has a 60mm backset. Before buying, measure from the edge of your door to the centre of the cylinder hole. If it is 60mm, this is a straight swap. If it is 40mm, this lock will not fit without drilling a new hole.
Priced at £11.99 at the time of writing
Check Price on AmazonYale B-85-CH-CH-40 Deadlocking Nightlatch, 40 mm, Chrome Finish
Yale
This is a significant step up in quality and security. The B-85 features a deadlocking mechanism which makes it much harder to slip the latch with a credit card from the outside. The chrome finish looks excellent on modernised Victorian doors.
The Good
- Automatic deadlock prevents 'carding' attacks
- Cannot be operated from inside if locked from outside (good for glass panel doors)
- Modern chrome finish resists tarnishing
The Bad
- 40mm backset is narrower than standard - check your measurements carefully
- Cannot be opened from inside without a key if deadlocked (safety consideration)
Installer Tip:
The 40mm backset is ideal for glazed doors with narrow timber stiles (the vertical wood capability). However, because it deadlocks automatically, ensure you do not leave your keys inside when popping out to the bin!
Priced at £19.99 at the time of writing
Check Price on AmazonDIDA® Traditional Nightlatch with 3 Copper Keys, Premium Solid Brass Rim Cylinder
DIDA
A robust alternative to the big brands, this DIDA nightlatch stands out by including three keys (saving you cutting costs) and a generous 5-year warranty. It fits a wide range of door thicknesses, making it versatile for older, thicker external doors.
The Good
- Includes 3 keys (standard is usually 2)
- Solid 5-year warranty provides peace of mind
- Suitable for thicker doors up to 57mm
The Bad
- Brand is less recognised in the UK than Yale
- Gold Nickel finish might clash with polished brass furniture
Installer Tip:
This unit is particularly forgiving on older doors that might be slightly thicker than average (up to 57mm). If you have a substantial Victorian front door, the connecting bar and screws included here are likely to fit without needing modification.
Priced at £14.99 at the time of writing
Check Price on AmazonFrequently Asked Questions
What is the difference between a nightlatch and a deadlock?
How do I measure the backset for a replacement lock?
Why is my nightlatch sticking in the winter?
Can I fit a nightlatch on a glass panelled door?
Do I need a joiner to replace a nightlatch?
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