
SOLAR PANELS ARE STANDARD FOR NEW HOUSES IN SOME AREAS; ELECTRICITY AT 20% OFF Workers install solar panels to generate electricity at a Lennar house in Castle Rock, Colo., last week. NATHAN W. ARMES FOR THE WALL STREET JOURNALBy KRIS HUDSON Dec. 1, 2014 7:48 p.m. ET27 COMMENTS GOLDEN, Colo.-When Donnie and Michelle Holsworth bought a three-bedroom house here in October from builder Lennar Corp., they got more than a home. The purchase included 20...