The next day I get a call from this contractor who is concerned about the work above what I asked him to bid (he was bidding the firewall only but discovered that we need a survey, plat map, cc&rs, hoa declaration, etc. and we had to go through the planning commission and city council for approval). I already knew these things are have bid that work. BUT...he was also told that a new change in the building code required a pressurized sprinkler system through out the building! So he started bidding that work as well. This is where a little knowledge pays big!
I went in to talk with the chief building official (don't talk to the inspectors, talk to the person with the final word) about getting an inspection to make sure I've accounted for all the important changes. In that discussion I asked him about the sprinkler requirement. He told me the same thing he told my (potential) contractor. However, having already had this discussion with him I had him pull out the building code and show me the definitions. Amazingly, I was right...a town home has 2 sides exposed with no one living above or beneath! As a town home the property falls into a different category and does NOT require a sprinkler system. He couldn't believe it (even though we had discussed this a couple weeks ago) and had to double check with the other code book. A few minutes later he emerges and verifies that I was indeed correct. So in my pre-inspection he is going to discuss the "new" discovery with the inspector to make sure that he is aware of this vital point as well.
That little bit of knowledge is going to save me thousands of dollars in upgrades and cost to change. In fact, it is probably the difference between a successful project and not doing the deal. In this case knowledge really is power (and a lot of money!).