How Much Does a Burglar Alarm Cost in the UK? (2026)

A professionally installed burglar alarm costs £500-800 for a bells-only system, £750-1,200 for a wireless monitored-ready system and £800-1,500 for a hard-wired system in 2026. Smart/app-controlled systems professionally fitted are £300-800, while DIY kits like Ring, SimpliSafe and Yale are £150-350. Monitoring is extra: £15-25 a month for ARC monitoring or £26-40 a month plus a one-off ~£50 URN fee for police-response. London and the South East typically add 20-30%.

A bells-only alarm for a typical 3-bed UK house costs £500-800 installed, using around four to five PIR sensors, a couple of door/window contacts, a control panel, keypad and external bell box. Adding professional or police-response monitoring takes a 3-bed system up to about £1,100 installed, plus £15-40 a month. The exact figure depends on how many doors, windows and rooms you protect rather than the bedroom count alone.

A bells-only (audible) alarm just sounds a siren and flashes the bell box when triggered — it relies on neighbours or passers-by hearing it, and nobody is alerted if you are away. A monitored alarm also sends a signal to a 24/7 alarm receiving centre (ARC), which can call your keyholders, dispatch a response firm or — with a confirmed system and a police URN — pass the activation to the police. Bells-only has no monthly cost; monitoring is £15-40 a month.

In 2026, self or app monitoring is £0-5 a month, professional ARC monitoring is £15-25 a month, and police-response monitoring is £26-40 a month plus a one-off police URN fee of around £50. A keyholder response service (a security firm attends on your behalf) is typically £250-350 a year. Brand examples include Verisure at around £32-40 a month, ADT around £30, SimpliSafe £9.99 and Ring from £8.

Only under specific conditions, and it is never automatic or guaranteed. Your system must be a confirmed alarm (two independent detectors must trigger), monitored through an ARC, registered with a police Unique Reference Number (URN), and installed by an NSI or SSAIB-certified company to BS EN 50131. Even then, the police treat it as a graded priority rather than a guarantee, and response is withdrawn after around three false alarms in 12 months in England, Wales and Northern Ireland. Scotland operates a different tiered model.

A URN (Unique Reference Number) is the registration that links your monitored alarm to a police response. It is issued by the local police force, usually applied for by your monitoring company, and costs a one-off fee of around £50. To get and keep a URN your alarm must be a confirmed system, monitored via an ARC, and installed and maintained by an NSI/SSAIB-certified company. The URN can be suspended if your system generates too many false alarms — generally about three in a rolling 12 months.

It can. A certified alarm installed to the right BS EN 50131 grade by an NSI/SSAIB company may earn a home-insurance premium discount — figures of up to around 20% are sometimes cited, though it varies by insurer and is only indicative. More importantly, where your policy requires an alarm, a certified and serviced system keeps your cover valid. A DIY or non-accredited system will not satisfy an insurer's condition and could see a claim reduced or refused.

No — there is no legal requirement to have a burglar alarm on a UK home. However, your home insurer may require one as a condition of cover, especially for higher contents values or higher-risk properties. When required, the insurer will specify the BS EN 50131 grade (usually Grade 2 for homes, Grade 3 for higher-value or commercial risks), an NSI/SSAIB-certified installer, and annual maintenance. Always check your policy wording before deciding what to fit.

BS EN 50131 is the European intruder-alarm standard, and it defines four security grades. Grade 1 is low-risk and rarely specified; Grade 2 is the standard for most UK homes; Grade 3 is required for higher-value homes and many commercial insurance conditions; Grade 4 is high-security and rare for domestic use. The grade is set by your insurer or a risk assessment, so confirm it in writing before installing. A system is only as high as its lowest-graded component, so every part must meet the target grade.

Both are good options in 2026 — it depends on the property. Wireless systems (£750-1,200 installed) avoid chasing cables into walls, fit faster, are easy to expand and suit most homes and retrofits; you do need to change sensor batteries periodically. Hard-wired systems (£800-1,500) are the most robust and tamper-resistant, with no batteries to manage, and are usually preferred for larger homes, new builds and higher security grades. For most existing UK homes a quality wireless system offers the best balance of cost and convenience.

DIY kits (Ring £150+ then from £8/mo, SimpliSafe £284.96 then £9.99/mo, Yale) are cheaper, easy to self-install and great for phone alerts, making them a sensible choice for renters and lower-risk homes. The crucial limitation is that a DIY, self-installed system does not qualify for a police URN and will not meet a home insurer's requirement for a certified alarm. If your insurer specifies an alarm, or you want a genuine response service, you need an NSI/SSAIB-certified professional install — not a DIY kit.

A 4-camera CCTV system costs £450-850 for wireless or £800-1,200 for wired, on top of the alarm. CCTV adds visible deterrence and recorded evidence but is separate from the intruder alarm. One legal note: if a home camera captures any part of a neighbour's property or a public space, UK data-protection law applies to you as the homeowner, so position cameras to cover your own boundary and be reasonable about footage retention. A good installer will set this up correctly.

A monitored or insurer-recognised alarm needs servicing at least once a year (twice a year for some Grade 3 and police-response systems). An annual service typically costs £80-150, or you can take a maintenance plan at £60-180 a year. Servicing keeps the system certified, the warranty valid and your insurer recognition and police URN in place — and it catches faults like a flat backup battery before they cause a false alarm that could cost you your police response.

If you want a police response, want the alarm to count with your insurer, or your policy specifies a graded system, then yes — you need a company certified by NSI or SSAIB, the two UKAS-accredited bodies that audit UK alarm installers. There is no single universal "approved" stamp, so ask which body certifies the firm and check the certificate. For a basic bells-only deterrent with no monitoring or insurance condition, certification is less critical, but using a certified installer still gives you a properly commissioned, standards-compliant system.