We’re getting drainage at our house. We need it because lots of rain tends to cause flooding. It’s not too bad but some areas (under the back door) have sunk due to the continual wet/dry cycling. There’s another reason though. Last time we got lots of rain the garage almost flooded. I don’t think I’d like it if that happened with all my stuff in there.
The plumber said we have the flattest block in Logan. There’s a 10mm from right to left and another 10mm drop from back to front. To be fair, the front yard does drop considerably more but that’s towards the street and there’s good drainage there.
Here’s a quick picture showing the proposed drainage trench.

The plumber wants a heap of money (I guess it’s fair since there’s lots of digging involved) so I’m going to get my brothers together and we’ll dig it out ourselves. The plan will probably change because of this (ie. even more trenches) but it’ll be heaps cheaper.