Not sure which type of lock protects your front door? You’re not alone. At Guardian Lock & Security, I help hundreds of residents each year who are unsure what locks they have – or whether those locks are secure enough. Knowing your lock type is the first step in protecting your home. In this guide, I’ll show you the most common locks found in UK homes, how to spot them quickly, and when you should consider an upgrade. If you’re searching for locksmiths, this article will help you understand exactly what to ask for.
What Are The Most Common Lock Types Used in Homes?
Properties vary from new builds to Victorian terraces. That means lock types can differ from home to home. Below are the most common lock types I find during callouts.
1. Euro Cylinder Locks
These are common on uPVC front doors, patio doors, and some garage doors. You’ll usually find a keyhole that’s centred in a slim metal barrel.
Where you’ll see them: uPVC or composite front/back doors
Security note: Older versions are prone to lock snapping – a known weakness burglars exploit. Modern anti-snap versions are available and strongly recommended.
If your door still has a basic euro cylinder, it may be leaving your home exposed. Upgrading to an anti-snap model is a quick, cost-effective way to strengthen your security and meet current standards.
2. Mortice Locks (Sash and Deadlocks)
Mortice locks sit inside the door edge and are commonly found on wooden doors. You’ll often use a larger, more traditional key with them.
- Sash lock: Includes a latch and a key mechanism
- Deadlock: Key-operated only, usually without a latch
Where you’ll see them: Internal wooden doors, external doors in older properties
Security note: Look for the British Standard kite mark. A five-lever BS3621 mortice lock is insurance-approved and far more secure.
If your mortice lock doesn’t show a British Standard kite mark, it may not offer the protection your home needs – or meet your insurer’s requirements. Replacing it with a 5-lever BS3621 model is a simple way to boost both security and compliance.
3. Night Latches (Yale Locks)
These are surface-mounted and commonly seen on wooden doors. The door locks automatically when closed, which can be convenient – but not always secure.
Where you’ll see them: Front doors in flats or older terraced houses
Security note: Consider pairing with a mortice deadlock for added protection.
While night latches offer convenience, basic models are easy to bypass and may not meet modern security expectations. Upgrading to a high-security version or pairing it with a mortice deadlock can give you far better protection.
How Can I Tell If My Locks Are Insurance-Approved?
Many homeowners think their locks are secure, but insurance providers often expect specific security standards. To check if your locks meet these requirements, start by looking for the British Standard kite mark – a heart-shaped padlock symbol with ‘BS’ inside. On a euro cylinder, you’ll usually find this engraved on the barrel. For mortice locks, it’s often stamped into the faceplate on the edge of the door. Still not sure? Don’t worry, a local locksmith will be able to help.
If you have a euro cylinder lock, check whether it meets the TS007 3-star standard. This rating means the lock is resistant to common attack methods like drilling, snapping, picking, and bumping. If your lock doesn’t meet these marks, it may not only be vulnerable but also fall short of your insurer’s requirements.
When To Consider A Lock Upgrade
Not all locks offer the same level of security. If your current locks are old, damaged, or simply not up to standard, they could put your home and belongings at risk. Here are some of the most common signs that it’s time to upgrade:
- You’ve moved into a new home and don’t know who has keys
- Your current locks show signs of rust, stiffness, or misalignment
- You experience frequent key jamming or turning issues
- Your locks don’t meet insurance standards
Upgrading to anti-snap or smart locks could significantly reduce your risk of burglary. It also ensures you meet the latest security expectations set by insurers. If any of the above apply to you, it’s worth booking a professional lock inspection to make sure your home is properly protected.
What’s The Best Lock For A Home?
The right lock depends on your property type, door material, and how the entrance is used. For uPVC or composite doors, we recommend fitting a TS007 3-star anti-snap euro cylinder, which offers strong protection against common break-in methods. If you have a wooden front door, a 5-lever BS3621 mortice deadlock combined with a high-security night latch gives you the layered security many insurers require. For shared entrances or flats, consider using a digital lock or access control system that suits communal areas while keeping unauthorised access out. Smart locks are becoming more common in, especially for short-term rentals or modern upgrades, but they must be installed correctly and meet recognised security standards such as Sold Secure or BS EN 14846. When fitted properly, smart locks can be a convenient and secure choice – but always check they comply with your insurance policy before making the switch.