• Use is growing slowly, but companies that have embraced 3-D scanning have drawings on which they can count when bidding and working and that merge with BIM.
• An accurate picture of where everything is before demo begins makes for fewer surprises and change orders, though some do not consider that last change a good thing.
• A scanning service provider notes that plans usually show features built at right angles, but, "If you've been in construction for more than 10 minutes, you know that is not how it is."

From the article:

Most remodeling contractors still generate building information models for an existing structure from original construction drawings, and the inevitable deviations end up as field surprises that result in costly change orders and delays....