Home Alarm Systems UK 2026: Types & Monitoring

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Key takeaway: A home alarm system can be a bells-only siren, a self-monitored smart alarm that alerts your phone, a speech dialler that calls keyholders, or a professionally monitored system linked to an Alarm Receiving Centre (ARC). Only the last type, installed by an NSI or SSAIB certified company and registered with a police Unique Reference Number (URN), can get a direct police response. Insurers that give a discount, or require an alarm, usually ask for NSI or SSAIB certification and a maintained system.

How we research this page: We summarise published guidance from the NSI, police forces, local councils, the ONS, Which? and insurers, plus trade cost guides and provider pricing pages. We have not tested or rated any alarm or provider. Prices were checked in October 2026 and change often, so confirm before you buy. CoverMap may earn a fee from some links – see our Advertiser Disclosure.

Why people fit a house alarm

ONS figures for the year ending March 2026 show police recorded burglary in England and Wales, covering homes and other buildings, fell by 9% to 223,456 offences. Fewer burglaries does not mean none, and an alarm is one of the visible deterrents burglars notice. In Which? research on what puts burglars off most, 71% named burglar alarm systems – level with dogs in the home, and ahead of CCTV at 46%.

The right alarm depends on who you expect to react when it goes off: neighbours, you, a keyholder, a guard or the police.

The four main types of burglar alarm in the UK

The National Security Inspectorate (NSI) groups home intruder alarms into bells-only, keyholder or speech dialler, and 24/7 remotely monitored systems. Self-monitored smart alarms sit alongside these.

1. Bells-only (audible) alarms

A bells-only alarm sounds a siren to scare off an intruder and alert anyone nearby. Nobody is told automatically. Confused.com notes the police are unlikely to respond unless someone reports seeing a crime. There is no monthly fee, which makes it the simplest option for lower-risk homes.

2. Self-monitored smart alarms (app alerts)

Smart alarms send a push notification or text to your phone when a sensor is triggered. You can arm, disarm and check the system from an app. Most are wireless and designed for DIY fitting. MyJobQuote puts app self-monitoring at under £5 a month, and some kits work with no subscription at all. The catch: if you miss the alert, nobody else acts on it.

3. Keyholder or speech dialler alarms

A speech dialler calls a list of nominated keyholders – friends, family or a paid keyholding company – when the alarm activates. BestBuilders puts a keyholder response service at £250–£350 a year.

4. Professionally monitored alarms (ARC) with police response

A monitored alarm sends signals to an ARC staffed 24/7. Staff check whether the activation is genuine, then contact your keyholders, a guard or – on a compliant system – the police. Crimestoppers warned in 2023 that a non-compliant alarm will not get an immediate police response. This is the only route to police attendance without a witness, and it comes with the strictest rules, covered below.

Wired vs wireless alarm systems

	Wired	Wireless
Installation	Professional, cables run to each sensor	DIY possible, faster to fit
Fitting time	1–2 days	1–2 hours for a smart kit
Power	Cabled to the control panel	Batteries in each sensor
Moving house	Stays with the property	Can be taken with you
Upkeep	Minimal once fitted	Regular battery changes

Source: Confused.com (October 2025); fitting times from MyJobQuote (September 2026).

Confused.com says wired systems cost less but need professional installation, while wireless systems cost more but are easier and faster to fit. A wireless alarm system suits renters and people who may move; wired suits owners planning a long stay or a full renovation. For a scenario-by-scenario view, see smart vs traditional alarms.

What an alarm system costs in 2026

Published cost guides disagree widely, so treat any single figure with caution. MyJobQuote (September 2026) lists bells-only from £125–£300 and wired from £400–£800, with an average installation of £450. BestBuilders (September 2026, from installer quotes in 519 UK towns) puts an installed bells-only system at £500–£800 and a monitored system at £750–£1,300. Both say London and the South East run 20–30% higher.

Ongoing costs matter as much as the install price:

Professional ARC monitoring: £15–£25 a month (MyJobQuote and BestBuilders)
Police-response monitoring: £26–£40 a month, plus around £50 one-off for the police URN (BestBuilders)
Servicing: £80–£150 a visit, or £60–£180 a year on a plan

We break every cost down in our home security system cost guide.

DIY smart alarm kit prices (checked October 2026)

Kit	Price	What’s in the box
Ring Alarm 2nd Gen 5-piece	£219.99 (Toolstation)	Base station, keypad, contact sensor, motion detector, range extender
Yale Sync IA-320 6-piece	£254 (Currys)	Hub, 104dB siren, 2 motion detectors, door/window contact, keypad
ERA Protect Alert Kit	£163.90 (Which?)	Contents not listed by Which?

Source: retailer pages and Which? (May 2026), checked October 2026. Prices change frequently.

Which? tested 33 alarm systems and found siren volume ranged from 79.7dB to 109dB, so loudness is worth checking. Also check how long a brand commits to support: Hive discontinued its Homeshield alarm, and support ended on 1 August 2025, according to Which? (July 2022).

Monitored alarm costs and contracts

Monitoring plans range from cheap app add-ons to full guard or police response. From providers’ own pages, checked October 2026:

Ring: plans from £4.99 a month. Only Ring Guard Response (£29.99 a month or £299.99 a year) dispatches a licensed security guard, with a stated 30-minute response time. Plans auto-renew until cancelled.
SimpliSafe: monitoring at 66p a day, no contract and cancel any time. Its Pro Premium tier can request Securitas guard response after camera verification.
Verisure: price by quote only, with an upfront installation payment and a minimum 12-month contract. The equipment stays the property of Verisure.

Before signing, check the contract length, who owns the equipment, cancellation terms, and whether “response” means police, a guard or just a phone call.

Police response: the NPCC rules

Police response to alarms in England, Wales and Northern Ireland is set by the National Police Chiefs’ Council (NPCC) policy. According to the NSI, to qualify:

The system must be installed by a police-recognised NSI Gold or Silver installer (Crimestoppers, in 2023, also listed SSAIB certification).
It must be monitored through an NSI-approved ARC.
Systems installed since June 2019 must comply with PD 6662:2017 and BS 8243.
A URN registers the system with your local police force. West Midlands Police (May 2026) says a URN application needs the installation certificate or certificate of conformity.

False alarms can cost you police response

The NSI says immediate police response is withdrawn after three false alarms in 12 months in England, Wales and Northern Ireland. To get it back, the cause must be identified and fixed. In Scotland, a system is first downgraded from Level One to Level Two, then to Level Three after more false calls. Fitting sensors properly, setting the alarm correctly and keeping it serviced all reduce the risk.

Alarm grades explained (BS EN 50131)

Alarms are graded 1 to 4 under BS EN 50131, with Grade 4 the highest. Security firm Clarion (2022) describes them as:

Grade 1: low risk; the intruder is expected to have little knowledge of alarm systems.
Grade 2: most homes; the intruder has some alarm knowledge and basic tools.
Grade 3: higher-risk or larger homes; the intruder is familiar with alarm systems and may carry specialist equipment.
Grade 4: very high risk, such as organised crime.

Construction.co.uk (May 2025) says homes typically need Grade 1–2 and larger homes Grade 3. A system is only as strong as its lowest-graded part.

Alarms and your home insurance

An alarm may lower your premium, but the effect varies by insurer, Admiral says. Insurers that want an alarm typically require it to be certified, installed and maintained by an NSI or SSAIB company. The NSI says your insurer may require an alarm depending on your risk level, and may ask for a Certificate of Compliance. You can check a company on the NSI or SSAIB databases.

Once your policy reflects an alarm, you must keep it working and use it. Admiral warns that not keeping it active, or not telling your insurer when you stop using it, could invalidate your policy. A self-installed kit won’t have been installed by an NSI or SSAIB company. See our home security insurance discounts guide and home insurance costs.

Noise rules and keyholders

Councils in England can act against alarms that cause a nuisance. Somerset and Oxford councils both say your external sounder should cut out after 20 minutes. If keyholders can’t be reached, councils can silence the alarm, get a warrant to enter if needed, and recover the cost from you – Somerset says at least £200.

Councils also ask you to nominate keyholders who live nearby and can silence the alarm within 20 minutes. Oxford asks for at least two, registered with Thames Valley Police within 48 hours. Schemes vary, so check with your council or force.

Frequently Asked Questions

Will the police respond to my house alarm?

Only if it is professionally monitored, installed by an NSI or SSAIB certified company, and registered with a police URN. Bells-only and self-monitored smart alarms don’t get a direct police response, so you or a neighbour would need to call 999 if you see a crime.

How much does a monitored alarm cost per month?

Trade guides put professional ARC monitoring at £15–£25 a month, and police-response monitoring at £26–£40 a month (BestBuilders, September 2026). Provider prices vary – Ring Guard Response is £29.99 a month and SimpliSafe monitoring is 66p a day, checked October 2026.

What happens after false alarms?

In England, Wales and Northern Ireland, immediate police response is withdrawn after three false alarms in 12 months, according to the NSI. The cause has to be found and fixed before response is restored.

Does a burglar alarm reduce home insurance?

It may, but there is no guarantee and it varies by insurer. Insurers usually want an NSI or SSAIB certified, maintained system. If your policy assumes an alarm, you must use it, or a claim could be rejected. See our insurance discounts guide.

How long can a house alarm sound for?

Councils including Somerset and Oxford say external sounders should cut out after 20 minutes. If an alarm keeps going, the council can silence it and recover the cost – at least £200, according to Somerset Council.

Is a wireless alarm system as good as a wired one?

Each has trade-offs. Wireless is quicker to fit, DIY-friendly and portable, but needs regular battery changes. Wired needs professional installation but little maintenance afterwards. What matters more for police response and insurance is certification, not wiring.

What alarm grade do I need for my home?

Most homes use Grade 2 under BS EN 50131; larger or higher-risk homes may need Grade 3. If your insurer requires an alarm, check the grade they specify.

Sources

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Home Alarm Systems UK 2026: Types, Costs & Monitoring