California’s Plan to Make New Buildings Greener Will Also Raise Costs

But in other locations like San Bernardino, a far less affluent city east of Los Angeles, where the typical home sells for about $529,000, the cost of solar panels and batteries can be a bigger burden to home buyers.

“If we push it and we do things that are modern and efficient and green, we tend to be able to do it in Los Angeles,” Mr. Marini said. “That’s not entirely true in the rest of the country. We can’t do that in San Bernardino. At the end, the consumer absorbs the cost.”

The Sycamore Square townhouses were the last ones developed in San Bernardino before the solar mandate took effect last year. Glenn Elssmann, a partner in the project who hired Mr. Marini’s company as the contractor, said the added cost of the solar requirement would have made construction of the development impossible. Homes in Sycamore Square started at $340,000 for the four-bedroom, three-bath units and reached as high as $370,000.

Jimmie Joyce, 44, who works in payroll at the Los Angeles County Department of Public Health, will soon close on the purchase of a house in Sycamore Square after trying for almost a year to buy closer to Inglewood, a city near the Los Angeles International Airport where he lives now. His commute will likely increase from about 40 minutes to an hour and a half.

“I, for one, didn’t even plan on moving out that far,” Mr. Joyce said. “The way the market is, people are just overbidding to just try to get in things.” He said he made an offer $10,000 to $15,000 higher than the asking price on a home that ended up with more than 70 bids, including one that was $60,000 more than his.

His new home is already expensive for him, he said, and adding $10,000 to $20,000 more for solar, a battery and other amenities “would make that much more challenging.”