Do I need to clean my house or do anything beforehand?

Do I need to clean my house or do anything beforehand?

It is a good idea to: 
Clear away any belongings to allow access into the crawl spaces, access hatches or attic space. Do the same for access to boilers, furnaces and water heaters. 
Make sure pets are tied up or confined to an area. 
Children need to be minded and kept away from the Assessor and any ladders or equipment. 
Have energy bills available.