KNX and Loxone end up on the same shortlist for a reason: both are professional, wired-first, locally processed automation platforms with no mandatory cloud and no monthly fee. Architects and M&E consultants tend to specify KNX out of habit; residential installers increasingly propose Loxone. We are in the unusual position of working with both — we hold KNX/EIB expertise in-house, and a steady part of our workload is migrating older KNX homes onto Loxone. So this comparison is written from commissioning experience on both sides, not from either brand's brochure.
The Short Answer
For a UK family home, Loxone usually wins: it is cheaper to install, dramatically cheaper to change afterwards, and the app, energy management, and automation logic are part of the product rather than extras you assemble. KNX home automation earns its place on large commercial projects, on jobs where the specification demands a multi-vendor open standard, and in buildings with a 30-year horizon where no single manufacturer should be load-bearing. Both are serious systems. The mistake is treating them as interchangeable, because they are organised around opposite ideas.
The Two Systems at a Glance
| KNX | Loxone | |
|---|---|---|
| What it is | Open international standard (evolved from EIB), 500+ manufacturers | Single-manufacturer ecosystem from Austria |
| Where logic lives | Decentralised — in each device on the bus | Central — on the Miniserver |
| Programming | ETS software: paid licence, certified specialists | Loxone Config: free download, any certified partner |
| App & visualisation | Separate server product, extra cost | Included, free, no subscription |
| Typical 4-bed London home | £25,000 – £50,000+ with visualisation | £15,000 – £40,000 installed |
| Cost of changes later | ETS reprogramming, specialist rates | Config session, often remote |
| Takeover by another company | Possible — if you have the ETS project file | Config lives on the Miniserver in your house |
| Strongest at | Commercial buildings, multi-vendor specs | Residential automation, energy, one ecosystem |
What KNX Actually Is
KNX is not a product — it is an open standard, roughly thirty years old, under which hundreds of manufacturers build interoperable devices that share a common bus. That is its superpower: you can mix a Gira keypad, an ABB dimmer, and a Zennio thermostat on one twisted-pair cable, and no single company's fortunes can strand your building. Logic is decentralised, sitting in the devices themselves, so there is no central controller to fail. This is why consultants specify KNX for offices, hotels, and public buildings, and why a KNX installation from 1995 can still be extended today. The costs of that openness are real, though: devices are priced like the professional components they are, everything is programmed in ETS (a paid, licensed tool used by certified specialists), and the polished app experience homeowners expect is not part of the standard — visualisation comes from a separate server product at a separate price.
What Loxone Actually Is
Loxone is the opposite trade: one manufacturer, one ecosystem, one brain. The Miniserver runs every decision locally, the Config software is free to download, and the app, remote access, and firmware updates cost nothing for the life of the system. Because one company designs the whole stack, the parts assume each other — presence sensors feed lighting, heating, and security without any integration work, and energy management is built in rather than bolted on. The trade-off is the mirror image of KNX's: you are betting on one manufacturer, the hardware catalogue is smaller, and there is no ETS-style vendor neutrality to fall back on. Our honest Loxone guide covers the platform in full, weaknesses included.
The Cost Comparison Nobody Shows You
For a 4-bed London house, our Loxone installations typically land between £15,000 and £40,000 depending on scope — and the visualisation, app, and logic are in that number. An equivalent KNX specification usually starts higher and climbs: the devices cost more per point, ETS programming time is billed at specialist rates, and by the time you add a visualisation server so the family can actually use the thing from a phone, £25,000 to £50,000+ is the realistic range we see on quotes clients bring us. The gap widens after handover. On KNX, every change — a new scene, a rezoned room, a swapped device — is an ETS session. On Loxone, it is a Config session, often done remotely in under an hour. Ten years of small changes is where the two systems separate financially, and our smart home cost calculator will give you a Loxone-side number for your own property in a minute.
Programming and Maintenance: ETS vs Config
This is the difference that decides most projects, and it is rarely explained honestly. KNX's ETS is powerful, standardised, and vendor-neutral — but it is a paid professional tool, and the people fluent in it are engineers who mostly work on commercial projects, at commercial day rates. Crucially, your leverage depends on a file: whoever holds the ETS project file holds practical control of your building, and if the original integrator vanishes without handing it over, a new one may be reverse-engineering your home. Insist on receiving the project file at handover — put it in the contract. Loxone's Config is free, and the live configuration sits on the Miniserver in your own house, so any certified partner can open it and carry on. We have taken over orphaned systems of both kinds, and the Loxone takeovers are afternoons where the KNX ones are projects.
When KNX Is the Right Answer
We would specify KNX without hesitation for a large commercial building with a professional facilities team, for a project whose procurement rules require an open multi-vendor standard, and for clients who need a device that genuinely only exists in the KNX catalogue — which, after thirty years and hundreds of manufacturers, does happen. If a well-programmed KNX system already runs your house and you are happy with it, keeping it is also a fine answer: it is good infrastructure, and we say so even though migration is a service we sell.
When Loxone Wins
For nearly every UK home we survey, Loxone is the better fit: meaningfully lower installed cost, automation that behaves as one system out of the box, an app the family actually enjoys, energy management included at a time when that matters, and no dependency on a project file or a specialist day rate for every small change. It is also the pragmatic middle path for KNX owners: the Miniserver can integrate KNX, so an existing installation can keep its wiring and better devices while Loxone becomes the brain — that hybrid is exactly how most of our KNX-to-Loxone migrations work, and it costs a fraction of ripping out a working bus.
The Verdict by Project Type
New-build family home: Loxone, wired with Tree while the walls are open. Renovation or period property: Loxone Air, without disturbing the fabric. Existing KNX house that needs a modern app and better logic: hybrid — keep the bus, add a Miniserver. Office, hotel, or multi-tenant building with an FM team: KNX, or Loxone's commercial range depending on scope — this one genuinely depends on the specification. Self-builder deciding at architect stage: get both quoted like-for-like including visualisation and ten years of changes, and read the numbers with this article open. Our free survey does exactly that comparison for your drawings, and our two-minute readiness check will tell you which path your project is on before anyone visits site.
Questions we get asked
What is KNX home automation?
KNX is an open international standard for building automation — not a single product. Hundreds of manufacturers make interoperable switches, dimmers, sensors and actuators that communicate over a shared bus cable, with the logic distributed across the devices themselves. It grew out of the EIB standard and has been running commercial buildings and high-end homes for around thirty years.
Is KNX worth it for a house?
For most UK homes, in our experience, the premium over Loxone is hard to justify: you pay more per device, more for programming, and extra for the visualisation server that makes the system pleasant to use — and every future change needs an ETS specialist. It becomes worth it when the project genuinely needs a multi-vendor open standard, or at commercial scale with a facilities team behind it.
Is KNX outdated?
No — it is actively developed, gaining IP-based and wireless variants, and its thirty-year backwards compatibility is a strength, not a museum piece. What can feel dated is the out-of-the-box user experience: a polished app is not part of the standard and has to be added via a separate server product. The bus itself is excellent infrastructure.
Can Loxone and KNX work together?
Yes, and this hybrid is a large part of our workload: the Loxone Miniserver integrates KNX, so an existing bus keeps its wiring and devices while Loxone takes over the logic, app and energy management. It is usually far cheaper than replacing a working KNX installation, and it fixes the two things owners complain about — the app and the cost of changes.
Who can program a KNX system, and what is ETS?
ETS is the official KNX programming tool — a paid, licensed piece of software used by certified KNX specialists. Any competent KNX partner can work on your system, but only if they have your ETS project file. That file is your leverage: make sure your contract says you receive a copy at handover, or a future takeover means partially reverse-engineering your own house.
Which is cheaper to run long-term, KNX or Loxone?
Neither has subscriptions, so the running cost is really the cost of change. On Loxone, changes are made in the free Config software by any certified partner, often remotely. On KNX, changes mean an ETS session at specialist rates. Over ten years of normal family life — new scenes, rearranged rooms, replaced devices — that difference adds up to thousands.
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