Smart Homes and Property Value: What the Evidence Actually Says

Every smart home company claims their installations increase property value. We used to quote a percentage too. This is the corrected version of that article, written after we went looking for the primary source behind the numbers everyone repeats and could not find one we would stand behind.

The Research, Honestly

There is no UK study we can cite that puts a reliable percentage on smart home value uplift. The figures that circulate in the industry — 3-5%, 5-10%, "up to 20%" — trace back to US surveys of agents and buyers (Coldwell Banker, Consumer Technology Association, Zillow listing-language analyses), not to matched UK sales data. Those surveys are about buyer preference, not transaction prices, and they were run in a different market with different housing stock. An earlier version of this post attributed a figure to a 2024 National Association of Estate Agents study; we have not been able to locate that study and have removed the claim. If you find a UK dataset that does the job properly, we would like to read it.

What London Agents Tell Us

What we can report is what agents we work with across Kensington, Chelsea, Hampstead and the Buckinghamshire border tell us, with the obvious caveat that this is anecdote from people who sell houses for a living. The consistent themes: integrated lighting, heating and security are now expected rather than remarkable in the upper end of the market; a home with a documented, professionally installed system gets more second viewings and fewer questions about "what happens when it breaks"; and buyers actively mark down bespoke systems that only the original installer can service. Nobody we spoke to would put a percentage on the sale price, and we are not going to do it for them.

What Buyers Actually Value

Not all smart features are equal. The features that add the most value, according to agents: integrated security (CCTV + alarms + access control), automated lighting throughout, climate control with energy monitoring, and structured networking. Multi-room audio is a nice bonus. What doesn't add value: voice assistants, smart plugs, and anything that requires the buyer to maintain subscriptions.

The ROI Calculation, Without Invented Inputs

A typical mid-range TechnoActive installation costs £20,000-£35,000. The parts of the return we can actually measure are the heating and cooling saving — Loxone's Energy House trials documented up to 51% less energy, and a large house previously run from one thermostat gets closest to that — and the absence of subscription fees over the life of the system. The property-value part is real but unquantified: treat it as protecting the money you spent rather than multiplying it. If someone sells you a smart home on a payback calculation that depends on a resale uplift percentage, ask them where the percentage came from.

The Catch

Whatever value there is applies only to professional, integrated, documented systems. A box of Philips Hue bulbs and a Ring doorbell will not move the needle, and a bespoke system nobody else can service can count against you. What protects value is a properly designed system, professionally installed, fully commissioned, with the configuration living in the house so any certified partner can take it on. With Loxone that is the default, and it is the reason we install it.

Thinking About It?

If you're considering smart home automation — whether for your own enjoyment or as a property investment — we're happy to discuss what makes sense for your specific situation. Every property is different, and we'll give you an honest assessment of the likely return. Explore our luxury smart home installations or book a free consultation. Call us on 020 8191 2479.