Reactive clay soil is the factor that sets this area apart. Clay expands when wet and shrinks when dry, and that seasonal ground movement puts stress on underground drainage. It shows up as pipes that crack, joints that pull apart, and sections that lose their fall and start holding water. If you've had recurring blockages in the same spot without an obvious cause like tree roots, ground movement is worth ruling in or out with a camera.

The same movement affects stormwater and can cause water to pool against foundations, which then makes the movement worse. Getting the discharge working properly is often the fix for what looks like a structural problem.

The 1990s and 2000s estates are now at the age where hot water systems, tapware and cisterns are all due together. The newer growth estates have a different profile again - mostly warranty-period issues, new build defects and extension work rather than wear.