Best Smart Home for Under £400
What Under £400 actually buys you in Smart Home, and the specific model we would choose at that budget.
Last revised
What you can expect to get for Under £400 in Smart Home, and which specific model we would buy at that budget.
What this budget buys you
This is where the value sits. Most of what a flagship does, without the halo features, and frequently with better battery life.
Our recommendation
Nest Doorbell (wired, 2nd gen) — £179. A tall 3:4 view that shows parcels on the doorstep, and it suits households expecting deliveries who want reliable package alerts.
Everything in this bracket
| Model | Price | Score | Best for |
|---|---|---|---|
| Nest Doorbell (wired, 2nd gen) | £179 | 4 / 5 | Households expecting deliveries who want reliable package alerts |
| Eufy S3 Pro Cam | £219 | 4 / 5 | Anyone who refuses a monthly fee for their own footage |
| Meross Smart Plug Mini | £12 | 4 / 5 | Anyone starting a smart home without committing to an ecosystem |
| Aqara Presence Sensor FP2 | £74 | 4 / 5 | Anyone whose lights keep switching off while they sit still |
| Aqara Hub M3 | £119 | 4 / 5 | Anyone who wants a smart home that survives an outage |
| Ecobee Smart Thermostat | £219 | 4 / 5 | Anyone whose upstairs rooms overheat while the hallway reads fine |
| Philips Hue Bridge Pro | £89 | 3 / 5 | People who have outgrown the standard bridge |
What to compromise on
Compromise on telephoto lenses, wireless charging and peak performance. These are rarely felt day to day.
Before you order
| Check | Why it matters |
|---|---|
| Support window | Counted from launch, not from your purchase. At this budget it is the specification most likely to end the device’s life. |
| Street price versus list | List prices in this bracket drift within weeks. Paying list on a model that has been out six months is the most common overspend. |
| What is in the box | Charger and cable are routinely omitted at every price point now. Budget for them separately or the bracket is not the bracket. |
| Return window | Two weeks is roughly how long it takes to find out whether the compromise at this budget is one you can live with. |
| Repairability | A cheap device with an expensive screen repair is not cheap. Check the part cost before you commit, not after. |
How to shop this bracket
Budget brackets are set by marketing, not by capability, and the boundaries move every year. The practical approach is to fix your number first, then buy the highest-scoring device at or below it rather than stretching for the one just above — the step up is almost never proportionate to the extra spend at this level. The exception is when the cheaper option fails on something you have already identified as non-negotiable, in which case it is not cheaper, it is simply wrong.
What spending more would buy you
The next step up is the Roborock S9 MaxV at £1,199, which scores 4 out of 5 and adds an extending side brush that genuinely cleans edges and corners. Worth it only if that sentence describes something you do rather than something you might.
What spending less would cost you
Nothing we have tested sits below this bracket. Going cheaper means leaving the range of hardware we are willing to recommend at all, which is a different decision from saving money.
What not to compromise on
Software support length is the one specification that does not improve with time. A cheaper device with two years of updates costs more per usable year than a dearer one with seven.
Behind this page
This reference page is written from the same testing notes as the reviews it supports, and it is revised whenever the hardware or the software underneath it changes. Where a figure appears here it has been measured rather than quoted from a specification sheet.
If something on this page no longer matches what you are seeing, it is out of date rather than disputed — tell us and it gets checked again.
Related reading
The reviews this page supports go into the measurements behind these figures, and the knowledge base collects every reference page we keep.
Elsewhere in buying guides: Best Smart Home for Under £700, Best Smartphones for Over £1,000 and Best Smartphones for Under £1,000.