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What to check in an older home before adding smart devices

Updated

Older flats and houses often differ from new builds in switch boxes, wiring, Wi-Fi coverage and aircon. A checklist to run through before you buy anything.

An older home is not a problem for a smart home, but it is a home with surprises. The switch box that looked ordinary may have no neutral wire, the walls may block Wi-Fi, and the aircon may be older than the apps that control it. A short survey before you buy saves returns and frustration.

Switch boxes

  • Is there a neutral wire? In many older homes the neutral goes straight to the light fitting and the switch box holds only the live and switched wires. Many smart switches need a neutral, so this decides which kind to buy. See our guide to smart switches without a neutral.
  • How many lights does each switch control? It changes the load a switch has to handle.
  • Is there room? A module or switch needs space behind the plate, so check before you order.

Opening a switch box is fixed-wiring work. In Singapore, it should be carried out by a licensed electrical worker.

Wiring and the distribution board

If you are adding devices that touch the wiring, ask a licensed electrical worker to look at the condition of the wiring and the distribution board first. They can tell you whether it is suitable and whether anything should be dealt with before smart devices go in.

Wi-Fi coverage

Thick concrete and brick walls, metal doors and lift cores weaken the signal. Walk around with a phone and check each place a device will sit. Our Wi-Fi guide explains when mesh or wired access points help.

Aircon and appliances

  • Note the brand and model of each indoor unit and the type of remote.
  • Check whether a controller can see the indoor unit.
  • Find out whether the manufacturer offers an adapter and what it does to the warranty.

See smart aircon control for the options.

Doors and locks

Note the door material, thickness and current lock type, and whether you own the door. A retrofit lock suits many older doors. See our smart door lock guide.

Write down what you find

A one-page record is enough: per room, which switches, which wiring, where Wi-Fi is weak, and what the aircon and door are. It is what you would show a contractor or a designer, and it turns guessing into planning.

Common questions

How do I know if my switch box has a neutral wire?

A licensed electrical worker can tell you by opening the box and looking for a neutral conductor next to the live and switched wires. It is blue in newer wiring and black in older wiring.

Can I open the switch boxes myself?

No. Work on fixed wiring in Singapore should be carried out by a licensed electrical worker, and that includes opening a switch box.

Does an older home need rewiring for a smart home?

Usually not. Retrofit modules, no-neutral switches and battery sensors work with existing wiring. A licensed electrical worker can tell you whether your wiring needs attention first.

A simple way to start

Spend an hour walking through the home with this list. Even a rough record makes the next step much clearer.

Want help surveying your home? Tell us about your home and we will start with a wiring and network survey. You can also read about upgrading an HDB resale flat.

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