Costs have increased at least 50% since 2002. Lumber is low right now, but labor, steel, concrete, and petroleum-based materials such as asphalt and PVC (which is now used for most plumbing) are way up. I don't think a "standard rate of inflation" would be an accurate indicator in this case because these items are commodities that trade independent of the rate of inflation. Bottom Line: You simply cannot build now for what you could 10 years ago. Add to that the fact that the building codes now require hurricane-related costs such as wind-rated glass, which is extremely expensive, and huge amounts of hurricane strapping that you won't find in 1999 homes. You are comparing apples and oranges.