Tools & Equipment

The UK’s Best Shed Alarm Systems For Preventing Intruder Theft

yellow sign that reads 'this shed is alarmed'
Written by April Foot

If you’re storing anything valuable in your garden shed, you should consider investing in a shed alarm system, to discourage and prevent theft.

Many people store expensive tools, outdoor equipment and mountain bikes in their garden sheds, which can total thousands of pounds. Along with locking your shed, a shed alarm system can give you peace of mind that your contents are as secure as possible.

Shed alarms come in different forms, but are usually motion-activated, and will either emit a loud, siren sound, or send a silent signal to your phone via an app, when an intruder is sensed. You can then investigate, and alert the police if necessary.

If you’re looking for the best shed alarm system to keep your garden equipment safe, take a look at this list of our 5 favourite options on the market. This is based on factors such as their usability, siren volume, extra functions and value for money.

Our #1 Top Pick
Thustar Security System, Wifi Alarm System 8 Piece kit with APP Push and Calling Alarms, No Monthly...
Power Source
Motion Detection
Sensor Range
Siren Level
Value Pick
Yale SAA5015 Wireless Shed and Garage Alarm, White
Power Source
4x AA batteries
Motion Detection
Sensor Range
Siren Level
Also Consider...
The Newest KERUI Standalone Home Shop Security Alarm Garage Alarm,Shed Alarm System Kit,Wireless...
Power Source
Motion Detection
Sensor Range
Siren Level

Last update on 2021-01-07 / Affiliate links / Images / Pricing from Amazon Product Advertising API

Look out would-be thief – we’re about to go all Home Alone on you!

Best Pick: Thustar Security Alarm System

Our top shed alarm is a high-tech, multi-sensor security system that will not only protect your shed, but your entire home – and can be controlled from your phone

Cost: £62.99

This Thustar Security Alarm System is our priciest shed alarm – but thanks to the plethora of extra features, it’s still clinches the title of our best pick. It includes 3 wireless sensors, which you can place in your shed, or by other doors and windows, and which connect to the main panel in your home.

However, as the name suggests, this is much more than just a shed alarm – it’s a full home security system. You can use the keypad to make phone calls, and it’s also a safety feature – it can be used by children and seniors to call for help, by alerting other members of the family through the alarm.

The alarm can be connected to a landline, to dial automatically in the case of an emergency. If you have a compatible GSM SIM card, the alarm can also be programmed to call or send a message to your mobile number. The unit is capable of remembering 6 phone numbers, and 2 SMS numbers.

Other features include 24/7 optional monitoring, and a built-in AI voice announcer. It supports 99 wireless defence zones, and 8 wired, and can be used with up to 5 remote controls (2 are included). If you prefer, you can also control the alarm via your phone or SMS. 

The alarm is mains-powered, and also requires a single A battery to function, which is included. As previously mentioned, this is our most expensive alarm – but considering the high quality and everything you get, this security system still represents unbelievably good value for money, and will protect your entire home.


  • Full home security system.
  • Includes multiple sensors, so you can cover doors and windows, as well as your shed.
  • Control the alarm from your phone, via SMS, or with a remote control.
  • Automatically receive alerts to your landline or your mobile phone.
  • Allows you to make phone calls from the main panel.


  • Our priciest alarm.
  • Only compatible with SIM cards on the 2G data network.
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Value Pick: Yale SAA5015

Battery-powered, motion-activated, and with a 100dB siren, our best value shed alarm is simple yet effective

Cost: £16.00

If you’re just looking for an alarm for your shed, rather than a full home security system, you might prefer this Yale SAA5015 Alarm. It’s also significantly cheaper, at less than half the price of the Thustar.

This one has a much simpler, easy-to-use design. To operate, place the unit inside your shed door, and the alarm will sound 10 seconds after motion is detected – unless the 4-digit pin code is entered to deactivate it. When activated, a 100dB siren will sound, which is the quietest of all the alarms on this list, but should still be audible across most average-sized gardens.

A limited 12-metre detection range makes it ideal for smaller spaces, such as sheds and garages. You can choose either to mount it on the wall, or place it freestanding amongst other items on a shelf, where it may go unnoticed by a thief.

This alarm runs entirely on batteries, and requires 4 x AAs, which are unfortunately not provided. A battery level indicator light on the unit informs you when the batteries need changing – but you will need to remember to check this regularly, especially over winter if you’re not using your shed much. 

Overall, this simple yet effective alarm is the ideal, no-frills way to secure a shed or other small space, for the best price.


  • Motion-sensor alarm.
  • Sounds after 10 seconds, allowing you time to turn it off if it’s you.
  • 12m detection range makes it perfect for sheds.
  • Loud 100dB siren is easy to hear.
  • Can be freestanding or wall-mounted.
  • Battery level indicator warns when the battery life is low.


  • Requires 4 x AA batteries, which are not included.
  • You need to remember to check the battery level indicator regularly.
  • No main unit inside the house means you are reliant on hearing the alarm from your shed.
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KERUI Standalone Security Alarm

Secure your home’s doors and windows, as well as your shed, with this multi-sensor, remote-controlled alarm system

Cost: £30.99

This Standalone Security Alarm by KERUI is a slightly more high-tech home alarm system that includes motion-activated sensors, connected to a main siren.

This is another one that is capable of protecting your entire home if you so desire. Included with purchase are 2 door and window sensors, and 1 PIR motion detector – but the alarm is capable of supporting up to 30 wireless detectors, 8 remote controls and 4 doorbell buttons, if you want to purchase more separately.

The siren produces up to 110dB of sound (the same as a car horn) for 2 minutes, so it’s easy to hear from anywhere in the home. If you have children or seniors in the house, it will be reassuring to know that it can also be used as an SOS alarm, notifying other family members to distress by pressing a button on the remote control.

You can also use the remote control to arm and disarm the alarm, within a range of 250ft. The only thing you can’t do is control it from your phone. However, if that doesn’t bother you, this is another fantastic home security system, for an even more reasonable price than the Thustar, and we highly recommend it.


  • Complete home security system.
  • Compatible with up to 30 wireless sensors (3 included).
  • Loud 110dB siren is easy to hear.
  • Arm and disarm via remote control.
  • Can also be used as an SOS emergency alarm for children and seniors.


  • Can’t be linked to your mobile phone.
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CPVAN Motion Sensor Alarm

Our loudest shed alarm system produces an impressive 125dB of sound, that should be easily audible from your home

Cost: No products found.

This CPVAN Motion Sensor Alarm is a standalone unit that can be placed inside your shed, ready to be activated when it senses motion. Intruders had better beware, because this is our loudest alarm, producing a piercing 125dB of sound, over a range of 100m – so you should be able to hear it clearly from your home.

The detection range of the motion sensor is 5-8m, which is comparatively short, but still shouldn’t be a problem for most sheds – especially if you place the sensor near the door. A freestanding design with bracket makes it easy to install.

The alarm can be controlled remotely, including stopping the siren. It is powered by 3 x AAA batteries, which are provided. If you want a more comprehensive home security system, you can also connect the alarm to up to 10 other CPVAN sensors.

Overall, this is another simple yet functional standalone alarm, and the louder siren might be perfect for users with sheds further away from their home, but who still want a shed-based alarm.


  • Simple, low cost solution.
  • Produces 125dB – our loudest shed alarm.
  • Easy to set up and install.
  • Can be remotely-controlled, including SOS function.
  • Compatible with up to 10 other CPVAN sensors.


  • Comparatively short detection range of 5-8m.
  • Motion sensor is sensitive – reports of alarm being activated by spiders etc.
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Tiiwee A1 Home Alarm System

A loud siren and multiple sensors make this home alarm system ideal for scaring away would-be thieves

Cost: No products found.

Our final shed alarm, the TiiWee A1 Home Alarm System, is another multi-sensor alarm that can be used to secure your home or outbuildings.

It includes 2 window and door sensors, which come with sticker pads, for super-easy installation – just apply the pads, peel and stick! If you want to protect more areas of your home, the alarm unit can support up to 40 sensors (must be purchased separately).

The motion sensors are linked to a main alarm, with a 120dB siren – our second loudest alarm, and one that is sure to startle and scare away thieves. You can control the alarm easily, using the included remote control.

The entire system is wireless and battery-operated (2 x AAA batteries are included), so you don’t need to worry in the event of a power cut, and you should get 4 – 6 months use from one set of batteries. The alarm arrives ready to use out of the box, and doesn’t require a Wi-Fi connection. 

Ultimately, this home alarm system effectively allows you to protect your shed and your home from potential thieves, and gives you that all-important peace of mind.


  • Multi-sensor alarm system.
  • Exceptionally loud 120dB alarm.
  • Sensors come with sticky pads, making them super easy to install.
  • Can be controlled remotely.
  • 2-year warranty.


  • No option for USB charging.
  • Remote control is a little sensitive – easy to set off the alarm from your pocket.
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Where To Position Your Shed Alarm

The best place to position your shed alarm is just inside the door, either on a nearby shelf, or mounted on the frame, or back of the door. This will mean the siren is activated as soon as someone tries to enter your shed.

Depending on the model of alarm you’ve purchased, you may be able to install it by removing a screw from the shed’s door frame, placing this through the mounting bracket of the alarm, and then replacing it in the frame.

Other Ways To Keep Your Shed Secure

As well as investing in a quality alarm system, such as those we’ve looked at here, there are other steps you can take to help secure your shed from intruders and thieves.

The first step is to make sure your shed’s structure is sound. Replace any loose or damaged wall panels, cover holes in the roof, and reinforce doors with metal plates or bars. 

You can also fit a motion-activated light on the exterior of your shed, which will make it difficult for intruders to sneak unseen into your garden. You should also make sure to keep the area around your shed clear, for the same reason.

Consider fixing a heavy duty lock to your shed – preferably a deadbolt, or similar. These are more secure than a generic padlock and should help to discourage potential thieves.

Similarly, you can replace the existing hinges on your shed door with some stronger, security ones. This will help prevent thieves from unscrewing the hinges and removing the door.

If your shed has a window, you should cover it from the inside with a curtain or privacy film (if you still want to allow light in), to keep prying eyes out. Don’t place garden storage boxes or other structures below the window, as they could be used as a step to gain access. Even if you take all these precautions, it is still possible that your shed might be broken into by a determined and cunning thief. Make sure that your home insurance covers items stored in outside structures, just in case.

About the author

April Foot

April is a freelance writer who specialises in travel, home and garden design, and the environment. She is an avid wildlife-enthusiast and adventure-seeker, and feels happiest when in the Great Outdoors.

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