Please help me take a look at this house. It is the only ground-floor unit in this location. There is a crack in the upper-right corner of the window, and the wall surface appears to have been swollen by water, with some rust stains. The exterior wall is rendered and has some noticeable fine cracks.
Should I Be Worried on This Crack?
photos:
https://freeimage.host/i/CHense9
https://freeimage.host/i/CHeni57
https://freeimage.host/i/CHenZzu
Yes you should be worried.
Looks like water is penetrating the render, and the flashing around the windows is also failing.
Based on the rust it's corroding the lintel and causing the render to crack.