Like they were in Ireland and now nobody wants to live there or everybody has to drive as they live in the bog.
As an englishman living in the “bog” the lack of planning appears to have worked well in my estate (with it’s 10% social housing) – 197 houses in the estate.
We can have up to 40 square meters built on the back with no planning. I’d say one person has built to the max, and their garden has loads of hedge around it.
At it’s worst the back gardens at one point looks like back to back yards of terraced houses except with nice yards.
It’s fine, the only scary bit is getting everything built to the regulations – it can take a while to find a quality builder.