The short answer
There is no single right answer — it depends on your property and how it is built. Wireless systems use radio links between sensors and the panel, so they are quicker and less disruptive to fit, ideal for finished homes where you do not want cables chased into walls; sensors run on batteries that need occasional replacement. Wired systems run a cable to every sensor, which means more labour and disruption to install but a connection that is not affected by radio interference and needs no sensor batteries. Once installed, the two work out broadly similar in total cost, often in the £600–£1,600 range; wireless saves on fitting time while wired saves on long-term battery upkeep. The right choice balances disruption, reliability and how your home is built.
The decision is really a trade-off between how disruptive the install is and how the system runs day to day. Here is how the two compare on the things that matter.
At a glance
- Wirelessradio links, quick install
- Wiredcabled, no interference
- Batterieswireless: yes; wired: no
- Total installedbroadly similar, ~£600–£1,600
- Best for finished homeswireless
How the technologies compare
Wireless alarms link sensors to the control panel by radio, so installation is faster and far less invasive — there is no cabling to run through finished walls and ceilings, which is why they are popular in existing homes. The trade-off is that each sensor runs on a battery that needs replacing periodically. Wired alarms connect every device with a physical cable. That takes longer to install and is more disruptive, but the link is stable, unaffected by radio interference, and the sensors do not need batteries — which can suit larger properties or new builds where cabling can go in before finishing.
| Factor | Wireless | Wired |
|---|---|---|
| Install speed | Faster, less disruptive | Slower, cabling needed |
| Interference | Possible (radio) | None (cabled) |
| Sensor batteries | Yes, periodic swap | No |
| Total installed cost | Broadly similar | Broadly similar |
General comparison for guidance. Costs and suitability depend on the property. Sources: trade alarm cost guides.
How to choose for your home
- Finished home, minimal disruption? wireless avoids chasing cables into decorated walls.
- New build or major renovation? wired can be run in before finishing, with no batteries to manage afterwards.
- Large or complex property? a wired system removes any worry about radio range or interference across the building.
- Want fit-and-mostly-forget? wired needs no sensor batteries, while wireless trades that for an easier, faster install.
Want help choosing wired or wireless?
We'll match you with a vetted alarm installer who surveys your property and explains which technology suits it, with the install and upkeep differences set out clearly.
Frequently asked questions
Is a wireless or wired burglar alarm better?
Neither is universally better. Wireless is quicker and less disruptive to fit and suits finished homes, but sensors need occasional batteries. Wired is more disruptive to install but is free of radio interference and needs no batteries. Total installed costs are broadly similar.
Do wireless alarms suffer from interference?
Wireless systems use radio links, so interference is possible in principle, though modern systems are designed to manage it. Wired systems avoid the issue entirely because every sensor is cabled to the panel.
Is a wired alarm more expensive than wireless?
Wired systems usually cost more in labour because of the cabling, while wireless equipment can cost more up front. Once installed, the two tend to work out broadly similar, often in the £600–£1,600 range depending on the property.
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.