In an indication that residential solar continues to boom, a California solar company that works with some of the largest home builders in the country is expanding.

Fremont, Calif.-based PetersenDean has announced the expansion of its corporate headquarters and the hiring of more than 500 staff members, says founder Jim Petersen. With the steady growth of its roofing and solar businesses, PetersenDean will be adding approximately 20,000 square feet of office space and plans to double its installations across all markets, which includes Arizona, California, Colorado, Florida, Nevada, Oklahoma and Texas.

The company works with builders such as D.R. Horton, KB Home, Pulte, and Lennar, and Petersen notes that solar has become a standard feature for many new home communities, especially in places like California, Nevada and Arizona.

“As the economy continues to recover and solar becomes more affordable, we have seen huge increases in demand across the board with both residential and commercial," he says. "We estimate that roofing and solar manufacturing has grown about 400 percent from last year and is only going to grow more from here on, especially as the costs come down further and more and more municipalities change their energy policies to require solar."