From a 2015 UT article:
"The 71-page study, financed with between $50,000 and $100,000 from area builders and the California Homebuilding Foundation, focused on five cities and the unincorporated area of the county.
Based on those cities' building permit processing history over the last three to five years and estimates from about 20 development companies, Reaser's group concluded that regulation could represent up to 55.9 percent or $480,746 of the cost of a new $860,000 apartment or condo in Carlsbad."
http://www.sandiegouniontribune.com/...htmlstory.html
Carlsbad $782,104 $339,214 43.40%
Chula Vista $747,969 $202,167 27.00%
San Diego $969,588 $438,061 45.20%
San Marcos $783,084 $217,051 27.70%
Santee $664,416 $143,002 21.50%
Other cities $830,602 $319,593 38.50%
Uninc. Area $989,319 $305,428 30.90%
Source: Point Loma Nazarene University
Based on homes selling for $600,000 or more.