Please see our market report which details out sales, inventory and so forth http://www.marinhomelistings.com/Communities/Monthly-Market-
Also my blog at http://www.marinhomelistings.com.
The problem with inventory has deep roots starting from the housing crash in 2007 when the builders halted new construction and focused on selling out their inventory. Reports suggest that it will take through 2015 for new construction to pick up. This is while reports by the National Association of Realtors also suggest that housing prices will continue upward through 2015.
Another factor is the increase in prices for goods in construction which will have an impact on new homes. It could be a few years before inventory catches up with the demand. I hope this helps.