You live in a condo on Sukhumvit, Ratchada or near Ari. You cannot rewire anything. The building runs the mains, the intercom and the lifts, and your name may not even be on the title. Every smart-home article seems to assume a house you own. This one does not.
A smart home in a Bangkok condo is possible, and it can be good. It just has different rules: build on top of what is there, keep every change reversible, and know exactly which changes need someone else's permission.
The condo rules that shape everything
Three facts decide what you can do.
- You usually cannot change the fixed wiring. Even if you own the unit, the electrical risers, the distribution board and the shared systems sit within a building managed by the juristic person. Even where the work is technically inside your unit, the rules may require approval.
- You may be renting. Then the landlord owns the walls, switches, locks and aircon. Your freedom is to add things and remove them when you leave.
- The building controls the shared systems. Lobby access, lift control, key cards, the intercom and the parcel room are not yours to modify.
So the plan is: use plug-in, battery-powered and stick-on devices; control existing equipment through its own remote or app; and keep everything that touches wiring, locks or shared systems out of scope unless the right person says yes.
What reversible actually means
A good test: could you remove it in an afternoon and leave the unit exactly as you found it? Reversible things include:
- Smart plugs that sit between the wall socket and the appliance.
- Smart bulbs that replace standard bulbs, with the old ones kept in a drawer.
- Battery-powered sensors stuck on with adhesive strips.
- Infrared controllers that sit on a shelf and aim at the aircon.
- Clip-on curtain motors that hang from the existing rail or sit on the existing track.
- A hub, which is just a small box on a shelf plugged into a socket.
Not reversible, or not clearly so: replacing wall switches, drilling into the wall or door frame, swapping a lock or its cylinder, adding a circuit or opening the breaker box. We come back to these in the permission section.
Aircon: the best first project
Air conditioning is the biggest controllable load in most Bangkok homes and the thing you notice first. Most condos use split units with an infrared remote, which makes control easy.
A small infrared controller learns the commands from your remote and sends them on a schedule or on a trigger. That gives you:
- Switch on twenty minutes before you get home, so you arrive to a cool room instead of a hot one.
- Switch off when you leave. This can be driven by your phone's location or by a door sensor.
- A night schedule that raises the temperature after you fall asleep.
- Control from outside the unit, including when you forgot to turn it off.
Do not cut the power to a split unit with a smart plug as your way of controlling it. Many units come back in a default state, and repeated hard power cuts are not what the equipment was designed for. Control it through its remote commands instead. We cover this in more depth in our guide to smart aircon control in Thailand.
Lighting that follows Bangkok sunset
A fixed clock time for evening lights is wrong for half the year. Sunset in Bangkok shifts through the seasons, and it is quite different in November from June. A schedule tied to actual sunset, with an offset such as thirty minutes before, is better. Hubs such as Home Assistant can calculate sunset for your location without a cloud subscription.
Practical ideas:
- Living room lamps come on at sunset, dim in the evening and go off at a set bedtime.
- A low-level hallway light on a motion sensor at night, so you do not walk into a table at 3 a.m.
- A "leaving" scene that turns everything off from one button or when the last person leaves.
Smart bulbs fit in your existing lamps. If your condo has recessed ceiling lights, check the bulb type before you buy. If you do not want to change fittings at all, a smart plug on a floor lamp does the job.
Curtains and heat
West-facing condos take a lot of afternoon sun, and heat through the glass makes the aircon work harder. Motorised curtains on a schedule can close in the afternoon and open in the morning.
For a rental, choose a device that clips onto the existing curtain rail or track, or one that moves a pull cord, instead of replacing the rail. Check your rail type first, because not every rail suits every motor. Pair the curtains with the aircon schedule: closing the curtains before the hottest part of the day is a simple and reversible way to take some load off the cooling. We will not promise a figure for savings, since it depends on the unit, the orientation, the glass and how you live.
Door sensors: small, cheap, useful
A battery-powered contact sensor on the front door tells you when it opens. On its own that is a notification. In a scene it can do more:
- Door opens after 17:00: lights on and aircon starts.
- Door opens and closes and nobody is home within ten minutes: turn the aircon off.
- Balcony door left open for five minutes with the aircon running: send a reminder.
- A delivery arrives and the door opens during the day while you are out: a quiet alert.
A sensor on the balcony door is underrated in Bangkok, where aircon cooling the outdoors is a common waste.
For families with a helper or nanny, door sensors add a little reassurance without cameras. Be sensible about privacy: tell people what the sensors do, and do not record people who have not agreed to it. If a camera is inside the unit, tell any staff or guests and keep it out of bedrooms and bathrooms.
The building intercom, lifts and key cards
This is where the temptation is to hack, and the answer is don't. The intercom, the lobby gate, the lift key-card control and the parcel system belong to the building. Tampering with them can breach your condo rules and can compromise security for the other residents.
What you can do:
- Ask the juristic office whether the building has a resident app, remote door release or a supported way to let delivery people in.
- Use the building's own tools. Many condos now offer an app for visitors and parcels.
- Put your smart layer inside your own door. Your unit's front door sensor, lights and aircon are yours to automate, even if the lobby is not.
- Do not replace your own intercom handset without checking, since it is often wired into the building system.
If you have a smart lock in mind, remember it replaces part of your door hardware. That needs the owner's agreement, and in some buildings the juristic office's too. There are non-invasive options that fit over the existing thumb-turn on the inside, but ask first.
What needs permission, in one table
| Change | Usually fine without asking | Ask the owner first | Ask the building too |
|---|---|---|---|
| Smart plugs, bulbs, sensors | Yes | ||
| Infrared aircon controller | Yes | ||
| Clip-on curtain motor | Yes | If the rail is replaced | |
| Hub and wifi extender | Yes | ||
| Replacing wall switches | Yes | Often | |
| Drilling or fixing to walls | Yes | ||
| Smart lock | Yes | Often | |
| Touching the breaker box | Yes | Yes | |
| Intercom, lifts, key cards | Yes, and usually no |
This is a rule of thumb and not a reading of your lease or your building's rules. Read your lease, and for anything borderline, ask in writing and keep the reply.
Network and power: the unglamorous part
Condo wifi is often crowded. A hub plugged into your router with a cable is more reliable than one on wifi. Sensors that use a low-power mesh, such as Zigbee, talk to the hub directly and do not load your wifi. Keep the router somewhere central, not behind a cupboard door.
Power cuts and building maintenance happen. Decide what happens when the power returns: the lights should not all come on at full brightness at 3 a.m. A good setup restores sensible states. Keep a surge-protected strip for the hub and router.
A sensible order to build in
- Fix the wifi and place the hub.
- Aircon scheduling and a "leaving" routine.
- Lights on sunset.
- Front door and balcony sensors.
- Curtains, if the afternoon sun is a problem.
- Only then, anything fancy.
Start small and live with it for a fortnight. The first week usually shows you what actually annoys you.
When to get help
You can do all of this yourself. Where people ask for help is the hub setup, making different brands work together and writing schedules that behave sensibly. DigitalRova's smart-home starter is from ฿19,900, about a day on site, and a whole-home project starts from ฿69,000. Device costs are listed separately. See our smart home solutions, the home automation page and pricing.
If you are renting and unsure what is allowed, tell us about your unit and we will say honestly what we would and would not install.