Smart Home Automation Cost in Kolkata: What Our Installations Show
Key numbers
- ₹35,000 – ₹75,000
- typical all-in cost for a 2BHK or 3BHK in Kolkata
- 3–5 hours
- average installation time for a standard flat
- 0
- internet connections required for lights, fans and automations to work
- 1 in 4
- rooms where we find a neutral wire problem before quoting
We install smart home systems across Kolkata flats — older buildings in South Kolkata, new housing societies in Rajarhat and Newtown, mid-rise blocks in Salt Lake. After every job we note what drove the price up, what kept it down, and what surprised the customer. Here is what the data looks like.
What makes up the cost
A smart home installation has three buckets: hardware, installation labour, and the hub — the central computer that runs the automations. Hardware is the largest variable. Labour is roughly fixed per room. The hub is a one-time cost that spreads across the whole flat.
Hardware: switches, sensors and controllers
Smart switches (₹800–₹1,800 each), a presence sensor per room (₹3,500–₹5,500), and a gateway or hub (₹4,000–₹8,000) are the core hardware. A 3BHK with three bedrooms, one hall and one kitchen typically needs 12–16 smart switches and 4–5 sensors. That puts base hardware at ₹25,000–₹40,000 before anything extra.
Labour and configuration
Labour covers pulling cable where needed, fitting switches, and programming the automations — schedules, presence triggers, scene buttons. We charge per room, not per device. A 3BHK typically takes one engineer one full day. Configuration adds another two to three hours. Rush installations (same-week) carry a ₹3,000 surcharge.
Ongoing cost: essentially zero
Because the system runs on hardware in your flat — not a cloud subscription — there is no monthly fee. The hub draws about 5 watts continuously, which adds under ₹50 per month to your electricity bill. The only recurring cost is the optional Nabu Casa remote-access subscription (₹650/year) if you want to control the home from outside.
What we find in the field
Numbers from our installations across Kolkata reveal consistent patterns that no product spec sheet will tell you.
The neutral wire problem
Older Kolkata buildings — anything pre-2010 in South Kolkata, parts of North and much of Central — were wired without a neutral wire at the switch box. Smart switches almost all require a neutral. In roughly one quarter of rooms we quote, we need to either run a new wire or use a no-neutral smart switch (which costs ₹400–₹600 more per switch and has slightly more limited dimming). We check this before quoting — no surprises at installation.
Geysers are always the first automation people want
Every customer without exception wants the geyser automated. Left on accidentally, it can run for hours. Our standard automation: switch on 30 minutes before scheduled shower time, cut off 10 minutes after. In practice customers gain ₹200–₹400 per month in electricity savings and stop worrying about it. The geyser controller (₹1,800–₹2,500) pays for itself within 6–8 months.
Power cuts change the calculation
In areas with frequent load shedding (parts of Howrah, Barasat, and some North Kolkata localities), customers ask about battery backup. Our system is designed to survive a cut: every switch remembers its last state and resumes when power returns. The hub needs an UPS — a small 600VA unit costs ₹2,500 and keeps the hub alive through a 2–3 hour cut. We recommend it for every installation.
New housing societies versus older buildings
Housing society buildings built after 2018 in Rajarhat and Newtown almost always have neutral wires and structured cabling in a central cabinet. Installation is faster and cheaper — we can often use the existing cable runs. Older South Kolkata buildings require more field work. Budget ₹5,000–₹10,000 more for rewiring contingency in buildings older than 15 years.
How to get your estimate
The fastest way to understand the cost for your flat is to use our room-by-room estimator. Select your rooms and the devices you want automated — lights, fans, geyser, curtains, presence sensing — and you get a transparent itemised estimate. No form to fill, no call required first. If you want to discuss it, the number is there too.
Common questions about cost
Can I start with one room and expand later?
Yes, and many customers do. The hub supports the whole flat from day one; you add rooms as the budget allows. Starting with the master bedroom and the geyser is a common first phase. The hub cost (₹4,000–₹8,000) is fixed regardless of how many rooms you start with, so the per-room cost drops as you add more.
Is there a cost to move to a new flat?
Most hardware can be moved. Smart switches unscrew and reinstall. The hub goes wherever you go. Sensors use adhesive mounts. Moving a full flat takes about half a day. The one thing that does not travel is the cable run — if the new flat needs new neutral wires, that is an additional cost. We quote the move when it comes.
What if I only want presence sensing, not smart switches?
A presence sensor with no smart switches still gives you a great automation: the system knows which rooms are occupied and logs the data. Combined with a smart plug on the geyser or AC, you can run meaningful automations without rewiring anything. A sensor-only installation for a 3BHK comes to ₹15,000–₹22,000.