Home security has changed considerably in the last decade. Where once you might have relied on a basic burglar alarm and a couple of motion-sensor lights, today's smart security systems offer high-definition cameras, remote monitoring, intelligent alerts, and seamless integration with the rest of your smart home. The options, however, can be overwhelming.
This guide covers the main types of security systems available, the technology behind them, and what to consider when choosing a setup that is right for your home.
Wired vs Wireless Security Systems
The first decision most homeowners face is whether to go wired or wireless. Each has its place, and the right choice depends on your property and circumstances.
Wired systems
Wired security systems use physical cabling — typically coaxial or ethernet — to connect cameras and sensors to a central recorder. They are exceptionally reliable, immune to wireless interference, and well suited to larger properties or permanent installations. The trade-off is that installation requires running cables through walls and ceilings, which is easiest during a renovation or new build. A professional CCTV installation ensures cables are routed neatly and the system is configured correctly from the outset.
Wireless systems
Wireless cameras communicate over WiFi, making them easier to install without structural work. They are a good option for rented properties or situations where running cable is impractical. However, they depend on a strong and stable WiFi network, and signal can be affected by thick walls, distance from the router, or interference from other devices. Battery-powered models also need regular recharging.
Hybrid systems
Many modern installations combine both approaches — wired cameras at key fixed positions, with wireless cameras filling gaps or covering areas where cabling would be difficult. This gives you the reliability of wired infrastructure with the flexibility of wireless where you need it.
DIY vs Professional Installation
Off-the-shelf camera kits from consumer brands can be set up without professional help, and for a single camera covering a front door, that may be perfectly adequate. But for a comprehensive system covering multiple angles, with reliable recording and proper network configuration, professional installation makes a significant difference.
A professionally installed system ensures cameras are positioned for optimal coverage, cables are run properly, the network can handle the bandwidth, and the recorder is configured for reliable operation. It also means the system is tested thoroughly before handover.
CCTV Camera Types
Not all cameras are created equal. The type you choose should match the location and purpose.
Bullet cameras
Cylindrical in shape and typically wall-mounted, bullet cameras are designed for outdoor use. They are weatherproof, offer good range, and their visible profile can act as a deterrent. They are ideal for covering driveways, garden boundaries, and entry points.
Dome cameras
Dome cameras sit flush against a ceiling or soffit in a discreet, rounded housing. They are harder to tamper with and offer a wider viewing angle than bullet cameras. They work well both indoors and outdoors, and their unobtrusive design suits properties where aesthetics matter.
PTZ cameras
Pan-tilt-zoom cameras can be remotely controlled to move and zoom, covering a much larger area than a fixed camera. They are typically used in larger properties or commercial settings where active monitoring is required. For most domestic installations, fixed cameras with good coverage are more practical and cost-effective.
NVR vs Cloud Storage
Once your cameras are recording, the footage needs to go somewhere. The two main options are local recording via a Network Video Recorder (NVR) and cloud storage.
An NVR sits in your property and stores footage on internal hard drives. You own the hardware and the data, there are no monthly fees, and the system works independently of your internet connection. This is the approach we recommend for most installations, as it gives you full control and reliability.
Cloud storage uploads footage to remote servers, which can be accessed from anywhere. It provides off-site backup — useful if the recorder were stolen — but requires a reliable internet connection and typically comes with a monthly subscription fee. Many homeowners use a combination: local NVR for primary storage, with cloud backup for critical clips.
Video Doorbells
Video doorbells have become one of the most popular entry points into smart home security. They allow you to see and speak to visitors from your phone, whether you are at home or not. Most offer motion detection, night vision, and clip recording.
For the best experience, we recommend hardwired video doorbells over battery models. A hardwired doorbell draws power from your existing doorbell wiring (or a new low-voltage feed), so you never need to worry about charging. It also supports continuous recording rather than motion-triggered clips only.
Smart Locks and Access Control
Smart locks allow you to lock and unlock your door remotely, issue temporary access codes for visitors or tradespeople, and receive alerts when the door is opened. They pair well with video doorbells — you can see who is at the door and let them in without being there.
When choosing a smart lock, look for one that retains a physical key option as a backup, uses a reputable encryption standard, and integrates with your chosen smart home platform.
Alarm Systems
A modern smart alarm system combines traditional intrusion detection — door and window sensors, motion detectors — with smart connectivity. You can arm and disarm from your phone, receive instant alerts, and integrate the alarm with your cameras so that a triggered sensor automatically brings up the relevant camera feed.
Professional-grade alarm systems can also be connected to a monitoring centre for 24/7 response, which may be worth considering for higher-value properties or homes that are frequently unoccupied.
Integration with Smart Home Platforms
One of the greatest advantages of a smart home setup is the ability to make your security system work with everything else. Cameras can trigger lights, locks can be included in away-mode routines, and sensors can feed into a single dashboard alongside your heating, lighting, and energy monitoring.
For this to work well, it is important to choose components that are compatible with your platform of choice — whether that is Apple HomeKit, Google Home, Amazon Alexa, or a more advanced system like Home Assistant. Planning this integration from the start avoids compatibility headaches later.
Privacy Considerations and GDPR
If your CCTV cameras capture footage beyond your property boundary — including public pavements, roads, or neighbouring properties — you may have obligations under the UK General Data Protection Regulation (GDPR) and the Data Protection Act 2018.
In practice, this means you should position cameras to minimise coverage of areas outside your property, use privacy masking features where available, display signage informing people they may be recorded, and be prepared to respond to subject access requests. A professional installer can advise on camera positioning that balances coverage with privacy compliance.
The Role of Network Infrastructure
A security system is only as reliable as the network it runs on. Wireless cameras need consistent WiFi coverage, and even wired cameras typically connect to a network switch. If you are planning a multi-camera system, it is worth ensuring your home network is up to the task.
Dedicated ethernet wiring for cameras provides the most reliable connection, eliminates WiFi bandwidth concerns, and allows Power over Ethernet (PoE) — meaning a single cable carries both data and power to each camera. For any system with more than two or three cameras, a wired backbone makes a noticeable difference to reliability.
What to Look for in a System
When evaluating security systems, consider these factors:
- Resolution — 4K or at least 2K cameras provide usable detail for identification purposes
- Night vision — infrared or colour night vision for low-light performance
- Storage capacity — enough local storage to retain at least 30 days of footage
- Remote access — the ability to view live and recorded footage from your phone
- Weatherproofing — IP66 or IP67 rating for outdoor cameras
- Expandability — room to add more cameras or sensors in the future
- Integration — compatibility with your existing or planned smart home platform
- Reliability — wired connections where possible, with battery or UPS backup for critical components
Getting It Right From the Start
A well-designed security system should feel seamless — providing peace of mind without creating complexity. The key is proper planning: understanding what you need to protect, choosing the right equipment, and ensuring the infrastructure is in place to support it reliably.
Whether you are starting with a single camera and doorbell or planning a comprehensive multi-camera system with integrated alarms and smart locks, professional guidance at the design stage makes a considerable difference to the end result.