I have no idea what happened before I got the file but when I got it I found things were 'upside down', so components were coming in on their top not their base. So I did reset the axis and flipped the house upside down.
So Now: I have reset the axis and I find it is 'in the sky' and a long way behind the house. So I have moved the house to the original axis and I can now see the the back-front faces of the house are off by about 7.86 degrees. I have adjusted it and now all is good I think.
Thank you TIG for pointing me in the right direction.
Liz