Stay calm and keep talking to your child through the door, as a frightened child is the biggest problem. If your child is hurt, unwell, very distressed or cannot be heard, or the room has a danger such as fire, smoke or flooding, call 999 straight away. If your child is safe and well, an emergency locksmith can usually open an internal door quickly, with prices to unlock a door starting from £90. No official step-by-step guidance for this situation was found, so this guide is deliberately short on technique and focuses on keeping your child calm and getting the right help.
Stay calm and keep talking to your child
Your immediate priority is to keep your child calm and reassured through the closed door. A child locked in a bathroom or bedroom will quickly pick up on your stress, and panic can make the situation much harder to resolve. Sit on the floor by the door and keep a steady, normal conversation going so they know you are right there with them.
Some interior locks are designed to be released from the outside. The lock maker's instructions or an emergency locksmith will say how this works for your specific lock. Do not try to open it yourself.
Keep talking to your child about unrelated, everyday things to distract them from the locked door. Ask them to sit down on the floor away from the door while you arrange for someone to come and open it. Reassure them that help is on the way and that you are right there.
When to call 999 straight away
If your child is hurt, unwell, very distressed, or cannot be heard, you must act immediately. The NHS states that 999 is for life-threatening emergencies like serious road traffic accidents, strokes and heart attacks. When you ring 999, a call handler asks for the location of the emergency, what has happened and a contact number.
You must call 999 straight away if your child is locked in a room and any of these dangers are present:
- Your child is hurt, unwell or deeply distressed.
- You cannot hear your child speaking or moving.
- There is smoke or fire inside the room.
- A bath or sink is overflowing and causing flooding.
- The room has an open window that poses a fall risk.
If you are not sure whether you need to call 999, you can get help from NHS 111. For a child under 5, you can call 111 to speak to someone directly, or you can check symptoms online. The NHS guidance on when to call 999 was last reviewed on 3 February 2023, so you should check the NHS site for their current advice.
Why you should not force the door
It is natural to want to kick the door in or break the handle when your child is stuck on the other side. You must not force the door, take off the hinges or break any glass to get in. Doing this can easily cause serious injury to you or to your child standing just behind the door.
Breaking the door could also hurt your child and will leave you with a repair bill.
Do not try to take the door off its hinges, prise it open with tools or break any glass, because each of these can hurt you or your child. Wait for a professional who has the right tools to open the door safely.
Calling a locksmith for an internal door
If your child is safe and simply stuck, an emergency locksmith is the most practical person to call. An emergency locksmith has the tools to open an internal door quickly and without causing unnecessary damage to the timber. This is usually a quick job for a professional.
When you ring a locksmith, explain immediately that a child is locked inside the room. Ask how quickly they can arrive. If you find yourself locked out and need an emergency locksmith, clear communication about the situation helps them prepare.
A vetted locksmith will assess the lock on arrival and choose the fastest, safest way to open the door, aiming to avoid drilling. Once the door is open and your child is safe, they can repair or replace the faulty lock.
Fire and rescue services and what they may do
Fire and rescue services are sometimes called to help when a child is trapped, but they do not automatically attend every locked door. The 999 call handler decides whether a crew will attend.
For example, in a Cornwall Fire and Rescue Service incident on 7 April 2016, five firefighters on one appliance from Tolvaddon attended an incident where a child had become locked in a bathroom. The crews used small tools to release the child from the room.
This example does not mean every fire service will attend a similar call in your area. Do not rely on a crew being sent.
What a locksmith job normally costs
Prices for emergency locksmith work depend on the time of day, your location and the type of lock involved. Most emergency locksmiths do not charge a separate call-out fee, but you should always ask to be sure. You will normally pay for the labour time plus the cost of any replacement parts needed.
The Master Locksmiths Association (MLA) gives price estimates for 2026 to help you understand what is reasonable. Standard locksmith labour starts from around £85 per hour during normal working hours. An out of hours 24-hour locksmith can start from £105 per hour after 8pm, and this rate is likely to increase after midnight.
Prices are generally higher in London and the South East. The hourly price of a locksmith in London can be from £95, while an emergency locksmith in London starts from £122 per hour, rising to £153 per hour after midnight. The cost to unlock and open a locked door can start from £90, though this varies as some locks are easier to open than others and some doors have more than one lock fitted.
The table below sums up these MLA estimates.
|
Service or time of day |
Typical starting price |
|---|---|
|
Standard hourly labour |
From £85 |
|
London standard hourly labour |
From £95 |
|
out-of-hours labour (after 8pm) |
From £105 |
|
London emergency labour |
From £122, rising to £153 after midnight |
|
Unlocking and opening a door |
From £90 |
These are MLA estimates and prices vary by area, time of day and lock.
Be very cautious if you are quoted an exceptionally low price over the phone. The MLA warns that very cheap advertised prices such as £39, £49 or £59 usually indicate a scam. These rogue operators often quote a low figure to get the job, then raise the price once they arrive.
Checking the lock afterwards
Once your child is safely out of the room, you need to deal with the lock that caused the problem. Do not simply close the door and hope the issue does not happen again, as a faulty latch may jam again. Leave the door propped open until the lock has been inspected, repaired or completely removed from the timber.
A locksmith can usually fix the mechanism if a part has slipped or broken inside the casing. The typical price for repairing an internal door lock on a bedroom or bathroom is from £58, including VAT. This is generally cheaper than repairing a front or back door lock, which starts from £85.
If the lock is old, heavily worn or poorly fitted, the locksmith will likely recommend replacing it entirely. Ask them to fit a lock that meets current standards and is appropriate for the room. You can also ask them to check the latches on your other internal doors while they are at the property to prevent another lockout.
Making internal locks safer for children
The best way to prevent this emergency is to review how the doors inside your home operate. Many homes have traditional sashlocks or mortice deadlocks fitted to internal doors by previous owners. A key left in an internal lock can lead to a child being locked in.
Think about removing locks entirely on a child's bedroom and the family bathroom. If privacy is needed, ask a locksmith to fit or replace the lock with one that can be released from the outside in an emergency.
Check that all internal latches work smoothly and that the handles spring back into place without sticking. If you are unsure which type of internal door lock suits each room, a vetted locksmith can advise you and fit safe, appropriate hardware. Prevention is usually less stressful than an emergency call-out.
Questions to ask when you ring
When you are standing outside the locked door and ringing a locksmith, you need clear answers fast. Start by explaining that a child is locked inside and ask for their most accurate arrival time.
When you ring a locksmith, ask these questions to ensure you get the right help:
- How quickly can you arrive to help a trapped child?
- What is the total estimated price including labour and VAT?
- Do you charge a higher rate for evenings or weekends?
- Do you charge a separate call-out fee just for arriving?
- Will you try to open the door without drilling the lock?
- Are your locksmiths vetted by the Master Locksmiths Association?
A skilled locksmith will aim for non-destructive entry. Confirming these details on the phone helps you spot a rogue operator.
Common questions
Can a locksmith open a locked bathroom door?
Yes, an emergency locksmith can open a locked bathroom door quickly. A locksmith will aim to open the door without damaging it. Once open, the locksmith can repair or replace the faulty mechanism.
How long does it take a locksmith to unlock a bedroom door?
Opening a standard internal bedroom door is usually a very fast job for a trained locksmith, often taking well under an hour. The exact time depends on the type of lock fitted and whether the internal mechanism has broken. A vetted locksmith will have the right tools to do this efficiently.
Will the door be damaged if a locksmith opens it?
A skilled locksmith will aim for non-destructive entry, which means opening the door without drilling or damaging the wood or the frame. You should not force the door yourself, as this is what causes expensive damage and risks injury.
Why do toddlers lock themselves in rooms?
Toddlers are naturally curious and often play with door handles, thumbturns and keys left in locks. They can easily turn a lock to secure the door but lack the dexterity or understanding to turn it back. Removing keys from internal doors and asking a locksmith about locks that can be released from outside is a sensible way to prevent this.
Can I change an internal door lock myself?
It is best to leave changing an internal lock to a locksmith, especially a child-safe bathroom lock, because a poorly fitted lock is more likely to jam and cause another lockout.
Next steps
Taking the right immediate action will keep your child safe and resolve the lockout quickly. Follow these steps to manage the situation calmly:
- Talk to your child constantly to keep them calm and seated away from the door.
- Call 999 immediately if your child is hurt, unwell, deeply distressed or in immediate danger.
- Call NHS 111 if you are unsure whether you need an ambulance or fire rescue.
- Ring a local emergency locksmith if your child is safe but the door will not open.
- Ask the locksmith for a total price including labour, out-of-hours charges and VAT.
- Leave the door propped open once your child is out until the lock is repaired or replaced.
If you need a professional to open an internal door safely or to replace your locks with child-safe alternatives, you can find a locksmith near you to get a clear price and a fast response.
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