[nightshade]

There are really good materials around that will allow a garden to take the weight of a vehicle but grass or plants will still grow up through it, a hard-standing would cost (DIY)around £200 using these.
The run off these days into drainage systems (designed to be assisted by large areas of grass and soil) causes local flooding and in some circumstances contributes to serious flooding.
And do not start me on the gardens lost to hard pressed wildlife through the desert creating Decking