Thanks to HugeLunatic and simsample, discovered it was the rear garden that was the issue - so now know how to create a rear garden with a building that has a foundation.
By this time though, I discovered I liked having just decking in the rear garden so have submitted this lot to the moderation queue. I did use the Clean Installer but I think I have forgotten to mention it on the script - so expecting a CR already.
It is a funny thing but I had the opportunity to bypass the moderation queue; today when I check Statistics I don't, just as well I chose the option as it was my first lot upload.
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