8 Home Assistant Automations Every Home Should Have

Setting up Home Assistant is a milestone. You connect your smart plugs, pair a few light switches, add your thermostat, and look at your new dashboard. Then the big question hits: what should I actually automate first?

It's easy to get distracted by flashy ideas that look great in videos but get annoying in daily life. Good home automation runs quietly in the background. It solves practical problems, prevents expensive mistakes, and cuts repetitive tasks, without you tapping your phone all day.

These eight automations deliver value right away. They're straightforward to set up in Home Assistant 2024.10 or newer using the visual automation editor and the Home Assistant Companion app on your phone, with no custom code required.

First: test anything that protects your home

Automations that control water shutoffs and door locks need hands-on testing. Don't set up a leak shutoff and assume it will save your floors without checking it. Trigger the sensor with a wet paper towel, confirm the valve closes completely, and check that the alert reaches your phone. Test lock automations while you're home before relying on them when you leave town.

1. Motion-activated lights (with auto-off)

What it does: Turns lights on when motion is detected and off after the room has been empty for a set time, like five or ten minutes. You can limit it to after dark.

Why it matters: Hallways, pantries, stairs, basements and laundry rooms are where lights get left on for hours. Motion lighting gives you hands-free light when your arms are full and makes sure it turns off when nobody's there.

What you need: a motion sensor (Zigbee, Z-Wave or Wi-Fi) and a smart switch, relay or smart bulb.

Tip: Restart the off-timer every time motion is detected, instead of using a fixed delay. Otherwise the lights shut off while you're standing still reading a label or folding clothes. Add a condition on the sun (below the horizon) or a light sensor so the lights don't come on during sunny afternoons.

2. Door or garage left-open alert (with repeat reminders)

What it does: Watches the contact sensors on exterior doors or the garage. If one stays open longer than your limit (say, ten minutes), Home Assistant sends a notification to your phone, then repeats it every so often until the door is closed.

Why it matters: An open garage door invites theft, and an open back door lets heating, cooling and bugs through. One alert is easy to swipe away when your hands are busy; repeat reminders make sure the door actually gets closed.

What you need: door contact sensors or a garage door sensor, and the Home Assistant Companion app on your phone.

Tip: Don't flood your phone with a message every minute. Repeat every 10 to 15 minutes, and use different limits for different doors: five minutes for the front door, maybe thirty for the garage on a mild day.

3. Automatic water leak shutoff

What it does: When a leak sensor under an appliance or sink gets wet, Home Assistant closes a smart valve on your main water line and sends an urgent alert to your phone.

Why it matters: Water damage is one of the most expensive problems a homeowner can face. A burst washing machine hose or a failing water heater can release a lot of water fast. Shutting off the main within seconds can turn a disaster into a small cleanup.

What you need: leak sensors on the floor near the water heater, washing machine, refrigerator and under sinks, plus a smart main water valve (either an inline valve or a motor that clamps onto your existing ball valve).

Tip: Make the phone alert high priority. The Companion app supports critical notifications that can break through silent mode or Do Not Disturb, so a 2 a.m. leak actually wakes you up.

4. Auto-lock doors when everyone leaves

What it does: Uses everyone's phones to know who's home. When the last person leaves, Home Assistant locks the exterior doors and tells you it's done.

Why it matters: It ends the "did I lock the front door?" moment halfway through your commute.

What you need: smart locks connected to Home Assistant, and each adult's phone running the Companion app and linked to their person in Home Assistant.

Tip: Trigger on the home zone's head count dropping to zero rather than on any one phone. Add a short wait so a brief phone-location glitch doesn't lock the doors while someone is still home, and send a confirmation so everyone knows the house is locked.

5. Camera person alert with a snapshot

What it does: When a camera or video doorbell detects a person, Home Assistant grabs a snapshot and attaches it to the phone notification, with a cooldown so you aren't spammed.

Why it matters: "Motion detected in driveway" makes you stop, open an app and wait for the live feed, only to find a squirrel. A snapshot in the notification shows you at a glance whether it's a delivery, a neighbor, or something that needs attention.

What you need: a camera or video doorbell with person detection in Home Assistant (or local detection such as Frigate), and the Companion app.

Tip: Use a cooldown of three to five minutes per camera. When kids are playing in the driveway or a driver is unloading boxes, you want one alert, not ten.

6. Porch lights on at sunset, off at bedtime

What it does: Turns on your porch and outdoor lights at sunset and off at a set time, like 11 p.m.

Why it matters: A lit entry welcomes you home and discourages unwanted visitors. Mechanical timers drift as the seasons change; Home Assistant knows the exact sunset time for your location every day.

What you need: smart switches, relays or smart bulbs on your outdoor fixtures.

Tip: Use Home Assistant's built-in sun trigger. You can add an offset if you want the lights on a little before it gets dark. For late arrivals, a second automation can turn the porch light back on briefly when the front door unlocks.

7. One daily low-battery report

What it does: Once a day, Home Assistant checks every battery-powered sensor (doors, motion, temperature, leaks) and sends one message listing any below your threshold.

Why it matters: With dozens of wireless sensors, batteries die quietly, or you get random low-battery pings at bad times. One report a day keeps it under control.

What you need: any battery-powered Zigbee, Z-Wave or Bluetooth sensors in Home Assistant.

Tip: Send it at a time you'll actually act on it, like 9 a.m., and have it stay silent when every battery is fine.

8. One-tap goodnight routine

What it does: One tap turns off the lights, locks the exterior doors and sets the thermostat to your sleeping temperature. It can leave one light on dim for the walk to bed.

Why it matters: Walking the house every night checking doors, switches and the thermostat takes time. One routine does all of it and gives you peace of mind.

What you need: smart lights, smart locks and a smart thermostat. Optional: a bedside button, an NFC tag or a phone widget.

Tip: Build it as a Home Assistant script rather than an automation, so you can run it from anywhere: a dashboard button, a bedside button, an NFC tag or a voice assistant. Once it works, you can extend it, for example to check that the garage door is closed or to arm your security sensors.

Getting started without the headache

Building these from scratch in the visual editor is a great way to learn how Home Assistant's triggers, conditions and actions fit together. Take them one at a time, test each one, and adjust it to how your household actually lives.