If you share a boundary wall with a neighbour, or if your house sits very close to the one next door, your exterior colours will always be seen together. A shade that looks great on its own might clash badly with their existing colour – or vice versa.
Thinking about this in advance avoids unpleasant surprises like your lovely soft cream looking strangely dirty against their bright yellow, or your chosen grey making their house look odd (and potentially causing tension).
You don’t have to match perfectly, but choosing tones that sit comfortably together – or at least don’t fight – makes the whole street view more harmonious. In many areas, this also helps with overall property appeal and resale value.
