New Home Security First Day | Do This Before Dark

You got the keys at noon. The removal van's blocking the drive, you've got three kids running through rooms they've never been in, and somewhere in a box marked 'kitchen' is the kettle. Security is the last thing on your mind.

Make it the first.

Not because something bad will definitely happen on day one. But because the hour you move in is the one hour in your entire time at that property when you genuinely don't know who else has a key. The previous owner. Their cleaner. Their grown-up kids. The estate agent's office junior who never returned the spare. The neighbour who's been feeding the cat for six years.

That list isn't paranoia. It's just arithmetic. And the good news is that closing it down takes less than an hour if you work through it in the right order.

This is that order.

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Step One: Count Every Lock Before You Do Anything Else

Walk the entire property before a single box is unloaded. You're looking for every point of entry: front door, back door, garage door, side gate, conservatory door, any outbuilding with a padlock. Write it down or take photos on your phone.

You need to know what you're dealing with before you start changing anything. A 1930s semi in Rossington might have a proper five-lever mortice on the front and a bent door handle on the back. A new-build on the edge of Finningley will probably have uPVC doors throughout with multipoint locks, and the garage might be on a remote. A terraced property in Harworth might have a passageway at the side you didn't fully clock on the viewing.

Don't assume. Walk it.

Look specifically for: - Any door that's locked from the outside with a key but has no lock visible from the inside (could be a rack-bolt or a hidden deadlock you weren't given a key for) - Window locks that use a separate key, not the handle - Any padlocked gate or outbuilding - Garage side doors that open into the main house

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Step Two: Change the Front Door Cylinder. Today, Not Next Week

This is the one most people mean to do but push back until it gets forgotten entirely. Six months later they're still on the original cylinder with keys floating around they can't account for.

On a uPVC door with a multipoint lock, the cylinder is the oval-shaped barrel in the middle of the door. It's usually held in by a single screw accessed from the edge of the door. Swap it and you've cut off every key that was ever cut for that property.

What to fit:

Don't just fit a like-for-like replacement from a DIY shed. If the previous owner had a cheap Euro cylinder in there, upgrading it costs almost nothing extra and genuinely changes the security level.

You want a TS007 3-star rated cylinder, ideally with SS312 Diamond accreditation from the Sold Secure scheme. Brands worth specifying: Ultion, Avocet ABS, Mul-T-Lock. These resist snapping, which remains the most common method of forced entry on uPVC doors in the DN postcodes. If a burglar gets through, they'll almost never pick the lock. They'll snap the cylinder in about eight seconds with a pair of pliers.

A 3-star cylinder professionally supplied and fitted typically costs £80 to £130 depending on size and brand. That's a one-off cost that doesn't change regardless of how many times you change the keys. Worth every penny on day one.

If the front door has a traditional timber frame with a mortice lock, you want a BS3621 or BS8621 five-lever mortice. Check whether your home insurance policy specifies this, because some do, especially on older properties. The post on insurance lock requirements covers this in more detail, but the short version is: if your door's on the street in Tickhill or Blyth and it's got a three-lever mortice in it, you may not be covered under your buildings policy as standard.

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Step Three: The Back Door Gets the Same Treatment

Nobody ever does the back door on day one. That's exactly why it matters.

Back doors are statistically the higher-risk entry point for residential properties. They're out of sight from the street, often have older locks than the front because nobody upgraded them on the last change, and they frequently have single-pane glazing close to the handle.

If it's a uPVC back door: same cylinder swap as above. Same standard.

If it's a timber back door with glazing: make sure the mortice is a five-lever BS3621. Also check whether the glazing is close enough to the handle that someone could break a pane and reach through. If it is, a deadbolt fitted high and low (that can't be reached through the broken glass) is worth considering.

If there's a door between the garage and the house: treat this as your priority, not an afterthought. See the garage section below.

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Step Four: Window Locks. Count Them. Test Every Single One

This takes ten minutes but almost nobody does it properly.

Modern uPVC windows have a handle that locks, and often a secondary lock or restrictor operated by a separate key. That key is frequently missing, lost, or still on the previous owner's keyring. Try every window lock. If any fail to engage, or if you don't have a key that operates them, get them sorted.

Specifically look for:

Sash jammers on sliding windows. These are small bolts or pins that prevent a window being slid horizontally. If they're there but not in the engaged position, they're doing nothing.

Ventilation restrictor locks. Lots of properties in Austerfield and Misson have older uPVC with restrictor locks that let the window open about 100mm for ventilation but no further. The key is often on a hook in the kitchen. If it's not, these need replacing. They're not expensive (a couple of pounds per window for the part) but if you're fitting them throughout a property, get a locksmith to batch the job.

Upstairs windows. Bedroom windows are regularly forced on properties where the ground floor looks well secured. If a ladder can reach it, it's in scope.

Timber sash windows on older properties. If your new home's an older Victorian or Edwardian in the centre of Bawtry or around the Tickhill area, you may have sash windows with no lock at all, or a decorative fitch catch that provides virtually no security. Sash stops or dual screw locks are inexpensive and simple to fit.

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Step Five: The Garage. Don't Skip This.

Garage security is consistently underestimated. A few things to check:

Up-and-over doors with a manual T-handle. These typically have a simple lock that can be defeated in seconds. If it's the only barrier between the outside world and a door into your house, it's not enough. The internal garage-to-house door should have a proper mortice or multipoint lock on it and should be treated the same as the front door.

Roller garage doors on a remote. The motor has a release cord inside in case of power failure. If someone can get a hand through the top of the door (and with some older seals, they can), they can pull that cord and the door comes straight up. A secondary garage lock, a padlock bar across the bottom track, or a dedicated bolt lock will close this off.

Separate garages at the end of the garden. The padlock matters here. The post on cheap padlocks covers when to spend, but to summarise: anything without a hardened steel shackle and an anti-drill mechanism is a token gesture. An Abus 80TI or a Squire SS65CS are reasonable mid-range choices. Don't use a standard-grade brass padlock on a garage that holds a £4,000 bike or a van you need for work.

Garage side doors. These are often the weakest point on the whole property. They're frequently hollow-core or thin timber, with a single-lever lock or no lock at all. If there's a side door, it needs a decent deadbolt or a BS3621 mortice.

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Step Six: Side Gates and Perimeter Access

A locked side gate doesn't stop a determined burglar. But it does force a visible climb over a fence in a street where neighbours can see, which substantially changes the risk profile.

Check:

• Does the gate lock from both sides, or only from the outside? If someone can reach over and lift the internal latch, a padlock hasp on the inside changes that in five minutes.
• What condition is the bolt in? Gate bolts corrode faster than any other hardware on the property.
• If it's a wooden gate, is the frame still solid? A gate lock is only as good as the frame it's mounted in.

If the gate leads directly into the rear garden and you're on a corner plot (common on some of the estates around Martin Common and outside Doncaster on the DN10 corridor), consider a shroud padlock rather than an open-shackle one. An open shackle can be cropped. A shrouded or closed-shackle padlock gives the crop tool nothing to grip.

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Step Seven: Key Control. Right Now.

You've got keys from the estate agent, probably two or three sets. Work out how many keys exist for each lock. Where possible, change the locks so you start from zero, with a clean count.

If you're giving keys to a family member or neighbour for emergencies, make that a deliberate decision with a named person. Not a 'we'll work it out later' situation.

Don't cut extra keys until you've decided who needs them. Every key cut is a key that can be lost, copied or passed on.

If you're a landlord taking on a new property, or a tenant moving into a managed property in Harworth or Rossington: the same rule applies. The landlord's obligation on key control before a new tenancy starts is a separate conversation, but as a tenant you're within your rights to ask how many key sets exist and who holds them.

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Step Eight: The Stuff You Won't Think of Until It's Dark

A few things that come up on jobs I've done for people on moving day or the day after:

Meter cupboard locks. External meter boxes often have a standard utility key (a triangular or flat key used across the whole estate). This isn't a security risk for burglary, but it does give access to your gas or electricity supply. Some newer developments have lockable meter boxes. If yours does and you don't have the key, ask the developer or the previous owner's solicitor before completion.

Outbuildings with mortice padlock hasps. Sometimes you'll be handed a key that doesn't obviously fit anything you've found yet. Check every outbuilding and shed. Occasionally there's a locked compartment inside a shed or a blocked-up hatch the surveyor didn't spot.

Letterbox plates. A wide letterbox without a cage or restrictor is a tool-fishing risk on properties where the keys are left on a hallway table or hung near the door. A letterbox cage costs about £8 from any hardware supplier and takes ten minutes to fit.

Alarm systems. If the property has an existing alarm, get the panel engineer code changed before you leave day one. The previous owner's alarm company will have records of the installer code and potentially the user code. Your solicitor should have been given this information on completion, but in practice it's frequently missed. If you don't have it, ring the alarm company directly (the panel will usually have a sticker with the manufacturer's name) and request a code change.

Smart doorbells or cameras already installed. If the previous owner has left a Ring, Nest, or similar camera, assume it's still linked to their account and may still be recording. Either reset it fully to factory settings or remove it. Linked cameras after a house sale are a GDPR issue, and occasionally a practical security risk if the old owner can see when you're in or out.

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The Order If You Can Only Do Part of It Today

If the removal van's running late, the kids need feeding and you've got to make a choice about what to prioritise:

1. Front door cylinder. Change it. Everything else can wait.
2. Back door cylinder or lock. If it's different hardware, still do it.
3. Check the internal garage door if there is one.
4. Everything else can be done tomorrow morning, before you're settled in enough to forget.

Don't leave step one for 'this weekend'. Weekends become weeks.

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If you're moving into a property anywhere across the DN postcodes and want a locksmith who'll quote honestly before turning up, Rapid Response covers Bawtry and the surrounding area with an average arrival of under 30 minutes where traffic allows. Ring before or on the day, explain what you need, and you'll get a straight price on the call before anyone's dispatched. No surprises on the invoice.