Smart homes for existing apartments · Belgrade
A smarter home. No renovation.
Lights, heating, blinds and alerts — connected in one system that works with the switches you already have.
Live smart-apartment demo
Try a scene
Choose a scene and see your home change.
Apartment
Tap a room for its light
- Lights
- 2/5
- Now
- 1.27 kW
- Leak sensor
- Dry
- Heating
- 20.4° → 21.5°
Weather · Belgrade
18°C
Cloudy
- Feels like
- Feels like 15°
- Humidity
- 30%
- Tue25° 13°
- Wed27° 14°
- Thu29° 18°
Heating · Living room
Living room
20.4 °C · 46%
Bedroom
19.8 °C · 51%
Kitchen
22.1 °C · 49%
Hallway
20.6 °C · 47%
Energy
NowkW
6.80kWh today
- Heating1.13 kW
- Water heater0 W
- Lights14 W
- Other120 W
The wider the gap, the harder the heating works
Water heater
Waits for the low tariff at 00:00
Saved this month
—
Full-month estimate—
- Without automation
- —
- With automation
- —
— kWh moved to the low tariff · — days
Demo estimate: 80 l, 2 kW, 5 kWh a day. EPS green zone, energy only, excluding network fees and VAT: 9.61 / 2.40 RSD/kWh. We calculate real savings only after measuring your apartment.
Activity
Pick a scene or turn on a light.
This is the dashboard we install — on your phone and a wall tablet. Try the scenes.
Retrofit
An upgrade, not a renovation.
We build on what you already have. No breaking walls, no new cables through plaster, no repainting afterwards — wherever the installation allows.
Behind your existing switch
A small module fits into the existing box behind the switch. The switch works as before, and the light gains scenes and automations.
Battery-powered
Motion, door and water-leak sensors, as well as radiator valves, run on batteries. They stick on or screw on — no cables.
Plug-in
Smart plugs and an IR transmitter for the air conditioner and TV simply plug into the socket.
Appliances you already own
We connect your existing air conditioner, motorised blinds and water heater instead of replacing them.
If something can’t be done without bigger work, we tell you at the survey — before you buy any equipment.
Every day
Three examples for your apartment
See what triggers each automation, which equipment it needs and the indicative budget for a standalone installation. Models are examples, not a promise of compatibility with every device.
Temperature tailored to the room
Temperature tailored to the room
Radiators provide the primary heat, with AC assisting only when conditions allow.
A change in room temperature, presence or window state.
Two or three radiator valves control the primary heating. If the room still needs heat, AC heating can assist only when someone is present and the window is closed. AC cooling runs only with the window closed. If the window opens while the AC is running, it stops after 2 minutes.
Controller and connections
Home Assistant
A Home Assistant host with a compatible Zigbee coordinator or bridge and an integration for infrared AC control; required hardware is included in the total.
Equipment in this example
- Two or three SONOFF TRVZB radiator valves
- SONOFF SNZB-02P room-temperature sensor
- Compatible window contact sensor
- Compatible presence sensor
- Infrared controller for the existing AC
- Home Assistant host and required compatible Zigbee coordinator or bridge
What we check
- Radiator valve compatibility and room-temperature readings
- Sensor pairing, Zigbee coverage and infrared controller integration
- Existing AC support for heating, cooling and the stop command
Estimated installed total (EUR)
€850–€1,160
Estimate assumptions
An indicative standalone installed estimate, not a binding quote. Includes the listed equipment, required controller, installation and commissioning; VAT is included where applicable. Assumes existing radiators and AC. Models are representative examples, not universal compatibility guarantees. Final scope and price are confirmed after a home survey and compatibility checks.
Possible upgrades
- A wall tablet for viewing and control; not included in the displayed estimate.
Inside the system
The brain stays in your apartment.
A hub inside your apartment links sensors and switches over a local wireless network. Switch the internet off — the automations keep running.
01/04Hallway motion → light 30%
Specification
- Hub
- Home Assistant, in your apartment (Komfor and up)
- Wireless
- Zigbee — local, separate from your Wi-Fi
- Without internet
- Motion lights, scenes, buttons, leak alarm
- With internet
- Remote access and phone notifications
- Switches
- Stay; modules fit behind them where wiring allows
- Accounts and data
- In your name, with automatic backups
- Subscription
- Not required
- Installation
- Smaller packages usually take one day
Compatibility
Works with what you already have
- Existing switches
- Air conditioner
- Robot vacuum
- Television
- Blinds
- Radiators
- Energy use
- Water heater
We check every device for compatibility before you buy anything.
Packages
Start small. Expand when you like.
Every package is clearly scoped: how many devices, which automations and how you control them. You get an exact price after the survey.
Starter
A first step: a few everyday actions become automatic.
from €300
SONOFF / eWeLink
- Hallway light on motion
- “Leaving” scene turns every light off
Comfort
★One local system for the whole apartment, ready to expand.
after survey
Home Assistant
- Good night with one button
- Water leak alert
Voice
Comfort, plus voice commands in one room.
after survey
Home Assistant + voice device
- “Turn on movie mode” — Cinema scene
- “Good night” — whole apartment
Signature
Phone, voice and a permanent dashboard on the wall.
after survey
Home Assistant + voice + tablet
- Morning overview: weather, temperature, alerts
- Screen wakes as you approach
Prices are indicative and depend on the condition of the installation. You buy equipment directly from a local retailer, with the invoice and warranty in your name.
Compare packagesProcess
How we work
- 01
Survey
We visit and check the wiring, switches, signal and the devices you already own.
- 02
Proposal
You get a clear scope, equipment list and price. We also tell you what will not work.
- 03
Installation
We install without renovation where the wiring allows and set up the agreed automations.
- 04
Handover & support
Training, documentation, a backup and one planned follow-up visit.
Principles
Smart, but honest
Local control
Key automations run inside your home, even when the internet is down — tested before handover.
Your system, your data
Accounts are in your name. You grant support access and can revoke it.
No mandatory subscription
The system keeps working even if we stop working together. Support is paid as needed.
Honest about limits
Before you buy, we tell you what will not work and what depends on the internet.
Safety stays independent
Fire and CO alarms remain separate, certified devices.
Questions
Frequently asked questions
What if the internet goes down?
Local automations — motion lights, scenes and buttons — keep working. Remote access and phone notifications need the internet.
Do I need to replace my switches?
Usually not. Modules are fitted behind your existing switches where the wiring allows — we check this during the survey.
Who has access to my system?
Only you. Accounts are in your name, and you grant and revoke support access at any time.
Is there a monthly subscription?
No. Core functions work without a subscription from us. Changes and support after the initial tuning period are paid as needed.
Do you work in houses too?
Our focus is apartments in Belgrade. Houses are considered individually, after a survey.
How long does installation take?
Smaller packages usually take one day. You get the exact timing in the proposal, after the survey.
Let’s see what your apartment can do.
We visit, check the installation and propose only what makes sense.
The survey costs €30–50 and is deducted from the price if you accept the proposal.