Smart Home Wired vs Wireless — A Decision Tree for London

You're rewiring anyway — adding CAT6 to every room during first-fix adds £40-80 per drop. Not retrofitting later, when the same cable run is £200-400.

You have a 4-bed+ house with thick internal walls — wireless mesh struggles, wired backhaul is reliable.

You work from home with mandatory video calls — wired Ethernet to the office is non-negotiable for stability.

You're building or extending — first-fix wiring is the cheapest moment to add CAT6, low-voltage doorbells, security cabling.

Existing property, no rewire planned, want smart features now — Matter over Thread (or Zigbee where Matter isn't ready) deploys in hours not weeks.

Flat under 80m² with thin internal walls — wireless mesh covers the property reliably.

Renting — wired changes need landlord consent and aren't recoverable. Wireless devices move with you.

Budget under £1,500 for the smart layer — wired is hard to justify under this number unless you're already rewiring.

Wired backhaul + wireless leaves. Run CAT6 to every Wi-Fi access point location, every TV, every office. Smart bulbs, sensors, smart plugs stay wireless.

This gives you wireless device flexibility and wired backbone reliability. Best of both for most London homes.

Typical hybrid cost during a rewire: £600-1,200 additional. Standalone retrofit cost: £2,500-4,500.

For a 3-bed terrace, hybrid spec: 5 CAT6 drops (every TV + office + 2 AP locations), 1 patch panel, 1 mesh router with 2 satellites. Wireless layer adds 8-15 devices over time.

Matter — IP-based, runs over Thread or Wi-Fi. The interoperability layer. As of 2026, most major brands ship Matter-compatible devices but support is uneven.

Thread — low-power mesh, IPv6 native, the underlying transport for many Matter devices. Excellent for sensors and battery-powered devices.

Zigbee — older mesh protocol, broader device library than Matter as of 2026. Slowly being replaced by Matter-over-Thread.

Wi-Fi — fine for smart plugs, cameras, AVR. Battery-killer for sensors.

1-bed flat, urban London, owner-occupier — wireless only. Matter-over-Thread for sensors, Wi-Fi for everything else. £400-800 budget.

2-bed flat with home office — wireless plus wired Ethernet to the office. £500-1,000.

3-bed house, planning rewire in next 12 months — hybrid as part of rewire. £1,200-2,000 over base rewire cost.

4-bed+ house, no rewire planned — wireless mesh with multiple APs. Tolerate the Wi-Fi blackspot in the master bedroom. £800-1,500.

5-bed+ house with multiple offices — full wired backbone + wireless leaves. £2,500-4,500 for the wiring.

CAT6 (or CAT6a for futureproofing) — supports 10 GbE at 30-55m. Replaces all common in-home use cases for 15-20 years.

Matter-compatible smart hub — bring all your Zigbee, Thread and Wi-Fi devices into one app. Home Assistant + Matter is the open-source winning combo.

Standard PoE switch — power for cameras, APs, doorbells over the same cable. Saves separate plug-in transformers.

Future-proof your fuse board — leave 2 spare DIN slots in any upgrade for smart-control modules (smart energy monitor, central battery management, etc.).