I take it you are looking at Brentwood or are you looking at all of LA County in general.
For new construction Condos in Brentwood it is about 615 a square foot. and for homes it was 926 a square foot.
If you need it for another neighborhood in LA let me know. To lump all of LA in general would be inacurate as the prices vary greatly from one neighborhood to the next.
I have two examples of new construction, single family homes in the 3000-4000 s.f. range in Brentwood and North of Wilshire Santa Monica selling well under $850/ s.f.
12314 Gorham Sold $2,150,000 - 4600 s.f. @ $467.39 s.f. - 06/05/2009
1024 23rd Street Sold $2,425,000 - 3500 s.f. @ $692.85 s.f. - 05/22/2009
There may be homes that are selling closer to $850-$1,000 s.f. but it isn't hard to find home selling for less in Brentwood and Santa Monica. Generally speaking the larger the square footage of the home the less per square foot you pay. There are exceptions, however.
Aaron Mirsky - Sales Associate
Coldwell Banker Previews
11999 San Vicente Blvd Ste 100
Los Angeles, CA 90049
DRE # 01856545