Complete Buying Guide
How to Choose the Right Home Alarm System
Step 1: Assess Your Property's Vulnerabilities
Before comparing products, walk around your home and identify the entry points that matter most. Ground-floor doors and windows are the obvious starting points, but do not overlook back doors, side gates, garages, French doors, and basement windows. Properties with longer driveways or larger gardens may also benefit from perimeter detection before someone reaches the building.
For most homes, a starter kit covering the front door, back door, and one or two motion detectors covering main living areas provides a solid foundation. You can always expand with additional sensors later.
Step 2: Decide Between DIY and Professional Installation
DIY systems like Ring Alarm and SimpliSafe are genuinely easy to install. Most starter kits can be set up in under two hours using adhesive mounts and step-by-step app instructions. They require no drilling for basic sensor placement and no technical experience.
Professional installation makes sense for larger properties, hardwired systems, or buyers who want a surveyed and certified setup. Professional installation typically costs £100–£400 on top of equipment costs but includes a site survey, tested sensor placement, and often a maintenance package.
💡 Pro Tip
If you are unsure, start with a DIY system. You can always upgrade or add professional monitoring later. Most leading brands like Ring and SimpliSafe offer completely optional monthly monitoring that you can activate or cancel any time.
Step 3: Choose Your Monitoring Option
Self-monitoring means your phone receives alerts directly and you decide whether to call for help. This works well if you are generally available and responsive, but has gaps if your battery dies or you are in a meeting. Professional monitoring costs £5–£50 per month depending on the provider and response level, but means someone is always watching even if you cannot respond.
Some systems, like Yale, offer an in-between option: an app-based monitoring network of neighbours and trusted contacts who can check in when your alarm triggers. This is a cost-free alternative for lower-risk households.
Step 4: Select the Right Sensor Coverage
At minimum, fit contact sensors to your front and back doors plus any accessible ground-floor windows. Add PIR motion detectors to cover hallways and main entry routes inside the home. A single motion detector in a central hallway often covers far more area than multiple door sensors in isolated rooms.
For more complete coverage, add glass break sensors, shock detectors, and outdoor PIR sensors. Environmental sensors for smoke, CO and flooding add a safety layer beyond intrusion detection that is well worth the additional cost.
Step 5: Consider Smart Home Compatibility
If you already use Alexa, Google Home, or Apple HomeKit, choose an alarm that integrates natively. Ring Alarm works well with Amazon devices, SimpliSafe connects to Google Home, and Arlo supports all three major platforms. Smart integration lets you arm and disarm via voice, create automation routines like arming when you leave, and view your system status in a unified dashboard.
Step 6: Set a Realistic Budget
| Budget Range |
What to Expect |
Best For |
| £30–£80 |
Basic starter kit: 1–2 door sensors, 1 PIR, app alerts. No monitoring. |
Renters, apartments, basic deterrence |
| £80–£150 |
Complete DIY kit: 4–6 sensors, base station, keypad, optional monitoring |
Most homeowners starting out |
| £150–£300 |
Expanded system: 8+ sensors, camera integration, smart home support |
Medium-sized homes, families |
| £300–£600 |
Professional-grade DIY or entry professional system with full coverage |
Larger homes, frequent travellers |
| £600+ |
Professionally installed, NSI-approved system with 24/7 graded monitoring |
High-value homes, insurance requirements |
