The short answer
Yes, installing a burglar alarm yourself is cheaper upfront — a self-fit kit typically costs £100–£400 versus £350–£1,200+ for a professionally fitted system — because you avoid the labour. The saving is real for a basic bell-only or self-monitored deterrent. However, a DIY install cannot usually qualify for police response, which requires a graded system fitted by an NSI or SSAIB approved company holding a police URN, and it comes with no certification or maintenance. It may also not satisfy an insurer who specifies a maintained, graded alarm. The right choice depends on whether you want a simple deterrent or a monitored, responding system. These are typical UK ranges for guidance, not quotations.
Self-installation genuinely saves money, but the saving comes with trade-offs that matter for some homes. The figures below are typical UK ranges for guidance, not quotations.
DIY versus professional
- Self-fit kit~£100–£400
- Professionally fitted~£350–£1,200+
- DIY police responsenot available
- DIY certificationnone
- Insurer-required alarmusually needs approved install
What you save by doing it yourself
The saving from a DIY install is straightforward: you pay only for the hardware and not the labour. A self-fit kit — a control panel or hub, a few PIR sensors, door contacts, a keypad or app, and an external siren — typically costs between £100 and £400 depending on size and brand. Many modern kits are wireless and app-driven, designed to be paired and positioned without tools or wiring, so a competent householder can fit one in an afternoon. For a basic bell-only or self-monitored deterrent, this is a genuine, sensible way to cut the cost.
Self-monitored kits often have no monthly fee either: alerts go straight to your phone via an app, with no alarm receiving centre involved. So the lifetime running cost can be little more than the occasional battery. For homes where the goal is a visible deterrent plus phone alerts — and where the owner is comfortable being the responder — DIY is the lowest-cost route by a clear margin, and the kit can be moved if you relocate.
It is worth being realistic about the skill a tidy DIY install needs. Modern wireless kits are genuinely designed for self-fit, but positioning sensors well — angling PIRs to avoid radiators, draughts and direct sun, aligning door contacts, mounting the bell box securely at height — is what separates a reliable system from one that false-alarms. A householder comfortable with basic DIY can achieve a good result by following the manufacturer's placement guidance carefully; the saving is real, but it comes with the responsibility of getting the placement right, which a professional surveyor would otherwise handle.
On the raw numbers, DIY is cheaper at the point of purchase. A self-install wireless kit costs from well under £200 with no labour to pay, against several hundred for a professional supply-and-fit. For a confident DIYer fitting a bell-only alarm in a straightforward home, that saving is real and the work — mounting sensors, pairing them to the panel, setting timers — is within reach. Where the property is simple and you only want a deterrent and local alerts, self-installation can be a sensible, economical choice.
| Factor | DIY self-fit | Professional fit |
|---|---|---|
| Upfront cost | ~£100–£400 | ~£350–£1,200+ |
| Labour | your time | included in price |
| Police response (URN) | not available | available if graded |
| Certification / maintenance | none | included / contracted |
Indicative UK comparison for guidance. Sources: Which? and Checkatrade home security guides.
What you give up
The DIY saving comes at the cost of several things a professional install provides. The biggest is police response. A police Unique Reference Number is only issued to a system installed and maintained to a recognised standard by an NSI or SSAIB approved company. A self-fit kit cannot hold a URN, so even if it alerts you, it cannot trigger a confirmed police response in the way a monitored, graded alarm can. If police response matters to you, DIY is not an option.
You also give up certification and maintenance. A professional install comes with a record that the system meets a standard such as EN 50131, a survey that places sensors to minimise false alarms, and a maintenance regime that keeps it reliable. A DIY kit relies on your own placement and upkeep. For many homes that is fine, but where an insurer requires a maintained, graded alarm — common for higher-value properties or contents — a DIY system may not satisfy the policy, which would erase any saving if a claim were affected.
The savings narrow once you account for what a professional install includes beyond labour. A graded, certified system requires correct siting of detectors, walk-testing, tamper protection and commissioning to EN 50131, plus documentation an insurer will accept. A DIY system that is mis-sited or under-specified can generate false alarms or miss coverage, and it will not carry the certification some insurers require. So the comparison is not simply kit-versus-kit-plus-labour; it is a self-certified system against a documented, standards-compliant one.
When to pay for a professional fit
A professional install earns its higher cost in specific situations. If you want police response, you need an approved company, a graded system and a URN — DIY simply cannot deliver this. If your insurer specifies a maintained, graded alarm, the professional route is effectively required. And if you want professional monitoring by a 24-hour alarm receiving centre with confirmed-activation handling, that is built around a graded install rather than a self-fit kit.
There is also a quality argument. A surveyor positions sensors to give clean coverage without blind spots or false-alarm triggers, sets entry and exit timings correctly, and commissions the system properly — all of which reduce the nuisance alarms that plague poorly placed DIY setups. For a straightforward deterrent on a lower-risk, usually-occupied home, DIY is the cheaper and perfectly reasonable choice. For monitoring, police response, insurer compliance, or simply a reliably commissioned system, the professional fit is worth the extra and is often the only route that delivers what you need.
There is also a long-term angle beyond the first install. A professionally fitted, graded system comes with a maintenance path — an installer who knows the system, services it, and can keep a URN valid — whereas a DIY kit is yours to maintain and troubleshoot. For some owners that self-reliance is fine and keeps costs down indefinitely; for others, the absence of a service relationship becomes a drawback when a fault appears or the system needs extending. Weighing the upfront saving against who will look after the system over its life is part of an honest cost comparison, not just the day-one price.
The decisive factor is usually police response. A DIY alarm cannot obtain a police URN, because confirmed police attendance through the national scheme requires installation and maintenance by an NSI or SSAIB approved company, confirmed-activation signalling and a registered URN. No amount of self-installation can replicate that. If you genuinely want police response, or your insurer specifies an approved maintained system, the professional route is not the dearer version of the same thing — it is the only route that delivers those outcomes, and DIY cannot match it at any price.
Frequently asked questions
Can a DIY burglar alarm get police response?
No. Police response via a Unique Reference Number is only available for systems installed and maintained to a recognised standard by an NSI or SSAIB approved company. A self-fit kit cannot hold a URN, so it cannot trigger a confirmed police response.
Will a self-installed alarm affect my home insurance?
It can. Some insurers require a professionally installed and maintained, graded alarm as a condition of cover. A DIY kit may not satisfy that requirement, so check your policy before relying on one — non-compliance could outweigh the labour saving if a claim is affected.
Are DIY burglar alarm kits any good as a deterrent?
Yes, for a basic deterrent and phone alerts they are fine, and modern wireless app-driven kits are easy to fit. Their limits are no police response, no certification or maintenance, and reliance on your own sensor placement, which can cause false alarms if done poorly.
Sources & further reading
Figures on this page are typical UK ranges drawn from published sources and depend on your specific property and system. They are guidance, not a quotation.