Back in 2006, when housing was really starting to cool in Phoenix, a lot of construction shifted from residential to commercial.  Many people in real estate assured us that commercial projects would not take the hits that we were seeing in the residential market.    Since then, we’ve watched as a large number of commercial/office projects have gone in, including many that were planned to serve developments that have been cancelled or never filled in.  Now commercial and office rents are starting to suffer: [Thanks L!]

Soaring home-foreclosure rates, abandoned suburban development tracts and slumping home prices have made Phoenix a symbol of the nation’s housing crisis. Now, the Valley of the Sun also can claim a commercial real-estate market that is one of the most badly burned by the residential flameout.

This year, the Phoenix metropolitan area’s average annual office rents are expected to fall 5.6% from 2007 while retail rents will drop 6%, the steepest percentage declines of the 54 markets surveyed by Property & Portfolio Research Inc., a Boston-based real-estate research firm. The warehouse and apartment sectors are expected to log the second-worst rent declines. All sectors will have to absorb a slew of newly completed buildings before the supply begins to taper off significantly next year.

I disagree with the statement that these buildings will "have to be absorbed". These excess buildings can stand around "unabsorbed" like the housing inventory–taking up space and driving down prices.