Southern California is becoming a tight fit

But today, construction of condos and apartments is rapidly overtaking that of single-family residences, even in suburbs known for spread-out living.

It's part of a broader shift to urbanized living in Southern California, a change that brings with it significantly higher density and concerns about overcrowding and traffic.

Consider the Valley: In the 1940s, developers there and throughout the region were putting up houses wherever they could, plowing under vegetable fields and planting that dream along streets and cul-de-sacs.

But over the last six years, Los Angeles has approved more than 14,000 condos and apartments for construction in the San Fernando Valley, according to city records, nearly three times the number of single-family residences.

It's a trend that is mirrored throughout the region, and it is expected to intensify as Southern California stretches to accommodate a crush of 6.3 million new residents over the next 30 years.

So many new apartments will be built that by 2035, the number of multi-family dwellings under construction will outstrip the number of single-family residences two to one, according to projections by the Southern California Assn. of Governments.

The shift is starkly obvious in Los Angeles County, where 60% of residences built in 1993 were single-family. Last year in the county, 38% of residential construction was single-family and 62% was apartments and condos.

The increase in apartment and condominium dwellings will dramatically reshape the way people live in Southern California, heralding an era of increasing urbanization for residents used to suburbia.

Even in such traditionally wide-open areas as Riverside and Orange counties, the number of permits issued for multi-family housing has nearly tripled since 1999.

Apartments and condos have already overtaken the construction of single-family residences in Orange County, where so far this year developers have started work on twice as many multi-family units as individual houses.

The shift has implications for infrastructure, congestion, schools and even the style of neighborhoods, as apartments encroach on single-family enclaves.

Top planners say that if cities and counties are not careful about where they place these high-density projects, the development could overcrowd schools, burden water, sewer and power systems and make traffic worse.

Perhaps nowhere is this clash causing more controversy than along the southern stretch of Ventura Boulevard in the Valley.

In the Sherman Oaks-Studio City area alone, 2,300 apartments and condos were approved for construction between 2000 and 2006.

Neighbors there are already feeling cramped.

"What we have is a city in crisis," said Ellen Vukovich, a board member of the Sherman Oaks Homeowners Assn. "I don't know how long the homeowners are going to be able to stem the tide."

In Studio City, where mid-century houses and small apartment buildings are being replaced by mega-condo projects, residents are worried that the village-like nature of the community will be squashed under a crush of large new buildings and thousands of new residents.

As many as 1,600 new apartments or condos have been built or planned there in the last two years alone, and efforts are underway to produce 1,021 more units, according to figures gathered by neighborhood activists.