Can neighbours’ Wi-Fi slow mine down?
Who this page is for
Dense housing residents who see perfect speeds at 3am but poor speeds at 8pm on Wi-Fi only.
Plain-English definitions
- Co-channel interference
- Multiple access points transmitting on overlapping channels, increasing retries and lowering effective speed.
What to try
- Use 5 GHz or 6 GHz where signal allows.
- Choose automatic channel selection or follow router guidance.
- Ethernet critical devices.
Do not use unauthorised high-power transmitters; they can break rules and worsen noise.
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Example scenario
Ethernet to the desk solves work; Wi-Fi remains busy for phones. You accept Wi-Fi variability for casual use.
FAQ
Can I complain about neighbours’ routers?
Start with cooperative channel changes. Ofcom covers interference rules for equipment; follow current guidance.
Should I use auto channel selection?
Usually yes, unless you are diagnosing a specific interference issue with clear evidence.
Can DFS channels help on 5 GHz?
Sometimes, but rules and radar detection vary. Follow router guidance.
Does apartment living make 2.4 GHz unusable?
It can be crowded. Prefer 5 GHz or 6 GHz when signal allows, or use Ethernet for critical devices.
Can I ask neighbours to change channels?
Politely, yes, but there is no obligation. Focus on what you can control in your home.
Are there legal limits on Wi-Fi power in the UK?
Yes. Use approved equipment and settings; Ofcom regulates spectrum use.
Related guides
- Should I use 2.4 GHz, 5 GHz, or 6 GHz Wi-Fi?
- Why is Wi-Fi worse than Ethernet for gaming?
- Where should I put my router for better Wi-Fi?