Michael,
It not only depends upon the condition of the house and whether you include pictures and a lot of disclaimers...but it also depends upon where you are in the country. Reports in California are usually going to be in the 15-20 page range or less because of no basements and inspectors usually do not get on the roofs. In the Midwest the typical report is going to be 25-35 pages. Over the past 10 years that we have been involved in this industry across the country I would have to say the reports are getting longer on average. A 50 page report would be on the long side in most areas of the country. Jerry Peck's reports are not the norm since he does a completely different type of inspection compared to the typical home inspector.

Jeff Knight
Knights Software Solutions, Inc.
www.knightssoftware.com
"Leading handheld home inspection software for the past 10 years."