What Burglars Look for Front Door | Read Your Own Door Before They Do

Most burglars don't pick locks. They read doors. A slow walk past your front path, maybe thirty seconds of looking, and they've already made a judgement. Not a conscious checklist, exactly, more a pattern recognition built from experience. The good news is that the signals your door sends are mostly visible, fixable, and cheap to sort.

This is a field guide for reading your own front door the way a passing opportunist would. Walk outside. Stand on the pavement. Look back.

The Cylinder: The First Thing That Catches a Professional Eye

Stand on your doorstep and crouch slightly. Look at the euro cylinder in your lock. How far does it protrude beyond the door face?

If it sticks out more than 3 mm, it can be snapped with a pair of pliers in under thirty seconds. No skill required. This is the dominant forced entry method in the UK right now and has been for well over a decade. A TS007 1-star cylinder sitting proud of the escutcheon plate, perhaps bought as part of a door package from a national DIY chain, is a standing invitation.

What to check:

• Protrusion. Anything beyond 3 mm is a problem. Many older cylinders from brands like Yale's budget range or generic door-pack hardware sit 8 to 12 mm proud. That's enough to grip with channel-lock pliers and apply rotational force until the cylinder snaps at the shear line.
• Star rating. TS007 is the relevant standard. 1-star cylinders have anti-snap, but only just. A 3-star cylinder (Avocet ABS, Ultion, Mul-T-Lock MT5+) adds anti-pick, anti-bump, and anti-drill. The Sold Secure Diamond accreditation (SS312 Diamond) cross-references TS007 3-star and adds an independent attack test on top.
• Escutcheon plate. A hardened steel escutcheon grips the cylinder close to the door face and removes the purchase point. No plate, or a flimsy pressed-steel one, and even a 3-star cylinder is more exposed than it needs to be.

Replacing a cylinder in Ealing is a 20-minute job. An Ultion or Avocet ABS 3-star cylinder runs £35 to £55 supplied, and supply-and-fit at Locks Local is typically £80 to £100 all in. Against a kicked-in door and a burgled house, that's an easy calculation.

The Lock Itself: Mortice vs Nightlatch vs Both

A Yale-type nightlatch (the sprung bolt you pull the door shut on) is not a security lock. It's a convenience latch. The BS3621 standard for a five-lever mortice deadlock is what actually counts for most home insurance policies. The deadbolt throws 13 mm of hardened steel into the keep and it doesn't spring back.

From the street, a burglar can often tell which lock type you have by the door handle arrangement and whether there's a second keyhole below. One keyhole, no handle, usually a nightlatch only. That's a door that yields to a credit card shimmy or a single shoulder barge, no tools needed.

What to check:

• Do you have a five-lever BS3621 deadlock fitted? It'll say BS 3621 on the bolt face, or check the make and model.
• For uPVC or composite doors with a multipoint locking system, the relevant standard is PAS24. But the cylinder driving that multipoint system is still the weak point, see above.
• BS8621 is the key-free egress variant (useful if you have a door at the end of a corridor or near a gas meter). Same security level, just operable from inside without a key.

Letterbox Position and the Hook-Through Problem

A letterbox in the middle of the door, vertically central, is often within arm's reach of the door handle or lock. A thin wire, a rigid rod with a hook, and thirty seconds of fishing is enough to turn a thumb-turn nightlatch or lift a door chain. This is called letterbox fishing and it's straightforward enough that there are YouTube videos explaining exactly how it works.

The fix is a letterbox cage or baffle fitted to the inside of the door. A metal cage (Safeware and ERA both make decent ones, around £20 to £30) blocks the angle of attack entirely. It also stops the other letterbox trick, where a gloved hand reaches in to feel for keys left on a hook just inside the hall. Yes, people do this in W5 and W13 the same as anywhere else.

While you're thinking about the letterbox, check whether yours hangs open. A spring-loaded flap that stays shut doesn't broadcast whether you're home. A letterbox that droops open tells anyone looking that the spring is gone, and lets them see whether lights are on inside.

The Dark Porch

A deep, recessed porch is cover. Stand on the pavement at 9 pm. Can you see your front door clearly, or does it disappear into shadow? If it disappears, so does a person standing at it.

Motion-triggered lighting is the cheapest deterrent in home security. Not because burglars are afraid of lights, but because casual opportunists prefer to be invisible. A well-placed PIR floodlight above the porch, angled to cover the door and the approach path, changes that calculation. In a terraced row in Hanwell or on one of the Northfields roads with mature street trees, your porch may be darker than you've noticed because you always arrive in daylight.

Check: stand outside at night and look back. If you can't see your own door handle clearly from the gate, fit a light.

The Side Gate: The Real Entry Point

Most residential burglaries that go in through the front door don't start at the front door. They start at the side gate. If your side access lets someone into the back garden, and your back door or rear patio doors are less well secured than the front, the front door's quality becomes largely irrelevant.

In the semi-detached and terraced streets around Ealing Common, South Ealing, and the older Victorian stock in Acton and Chiswick, side gates are frequently either unlocked, fitted with a cheap padlock, or so low that anyone could step over. A Sold Secure Bronze padlock on a hasp is better than nothing. Sold Secure Silver or Gold, on a close-shackle hasp with coach bolts rather than wood screws, is the right answer. The shackle on a cheap padlock can be cut in three seconds with bolt croppers; a hardened steel close-shackle (Abloy, Mul-T-Lock, or a decent Squire) requires a grinder and time.

Gate height matters too. 1.8 m minimum if you can manage it. Trellis on top, anti-climb paint if the surface permits, or a rotating topper. Anti-climb paint (the stuff that never dries, stays permanently tacky) is cheap, legal, requires a warning sign, and is genuinely effective because nobody wants it on their clothes.

Bins, Bikes, Ladders, and Anything Else to Stand On

Wheelies bins are routinely pushed up to walls and side gates and used as steps. In the weeks before and after bin day, the bin is outside anyway. In Ealing borough, that's usually one wheeled bin plus a recycling box, often left on the front path between collections.

If your bin lives next to the side gate, or against the wall below a ground-floor window, it's a step. Move it. A bike leaning against the wall below your bay window is also a step, and it's also a bike that might not be there when you get home.

Ladders stored externally (in an open-fronted car port or accessible side return) are a version of this problem at a larger scale.

The Door Frame: Where Security Actually Fails

A BS3621 deadlock throwing 13 mm of steel into a rotten wooden frame is not 13 mm of security. It's however many millimetres of wood remain between the keep and the edge of the frame before the whole thing splinters. Door frame failures are more common than lock failures in kick-in attacks. The door doesn't break; the frame does.

Run your thumb along the frame at the keep position. Any soft spots, any paint that feels hollow, any old filler around a previous keep? That's where it'll go.

A door frame reinforcer (Doormaster and Doorlok both make steel versions that fit inside the existing frame and extend the keep engagement depth) costs around £60 to £90 and significantly changes the maths on a boot-to-the-door attack. If the frame itself is shot, that's a carpentry job before a locksmith job.

For composite doors in Greenford, Northolt, or the newer estates around Perivale and Park Royal, the frame is often uPVC rather than timber, and the weak point shifts to the compression fit of the frame in the reveal and the quality of the multipoint keep plates. Check that keep plates are steel, not the plastic placeholders sometimes fitted on installation.

Door Hinges: The Other Side of the Door

If your door opens outward (less common in UK residential but not unknown, especially on older properties and some commercial units in Brentford or Southall), the hinge pins are exposed. Those can be driven out. For inward-opening doors, the hinges are inside, which is the right place for them, but check that they're actually fixed properly. Three hinges minimum. No missing screws. No screws that turn freely in a stripped hole.

Security hinges have a bolt-and-socket arrangement that keeps the door in the frame even if the hinge pin is removed. If you're replacing a door entirely, spec them in. If you're not, at least make sure what you have is properly fastened.

What the Door Tells Them About Whether You're Home

An opportunist isn't just assessing the hardware. They're reading signals about occupancy.

• Post or leaflets protruding from the letterbox (especially multiple days' worth)
• Milk bottles sitting out past mid-morning
• A porch light left on permanently for days (counterintuitively signals absence in some contexts)
• No car on the drive for a week, blinds at the same angle every day
• A visible alarm panel through the hall window that shows a green light rather than armed

None of these are about the lock. All of them contribute to the thirty-second read.

A visible, working alarm with a siren box on the front elevation is a meaningful deterrent, not because it stops a determined professional but because it changes the risk calculation for the opportunist. Same with a doorbell camera (Ring, Nest, Ajax). They're visible. They're known. Most casual opportunists would rather find a door without one.

A Quick Reference: Signals Read from the Pavement

The Thirty-Second Self-Assessment

Do this now, or next time you get back from the shops.

1. Stand on the pavement. Look at your door. How much of the cylinder is visible and proud of the door face?
2. Count your keyholes. One is probably not enough.
3. Walk to the side gate. Is it locked? Is the padlock actually closed? Could you reach over it or step over it?
4. Check what's next to the gate or below any accessible windows. Remove anything that functions as a step.
5. Look at your porch from the pavement after dark. Is it lit, or is it a shadow box?
6. Open your letterbox from outside (carefully). Can you see, or reach, the lock or handle?
7. Check the frame at the keep positions. Press. Is it solid?

That's it. Seven checks, ten minutes, no tools.

If you find something and want it sorted, Locks Local covers Ealing and the surrounding West London postcodes, W5 across to NW10, and typical arrival is under 30 minutes. Pricing is given honestly on the call before any work starts. No callout fee quoted one way and charged another.