these homes from the rooftop down. >> lennar founded sunstreet in 2010 as a way to increase its solar footprint. for the last five years, all of the builders new homes in california have solar panels >> we thought it was important to focus on environmental sensitivity. >> that notion will soon be the law. starting in 2020, all new homes constructed in california will be required to have solar panels that could come at a cost to home buyers who would pay an extra $10,000 up front for the solar panels officials estimate that homeowners would save $19,000 over the course of a 30 year mortgage for some consumers, the sticker shock of the up front cost is a bit unsettling not to mention feeling forced to buy a feature they didn't ask for in the first place >> i almost got apprehensive about it we live in a free society. someone's telling me i have to have solar in the home >> once he did the math, he estimated the monthly energy savings could be as high as $200 a month. making the purchase a no-brainer. >> the solar is the icing on the cake >> how many homes in this community? >> this comm