In the 1970s, a new wing was added, going out at a southwestern angle to create a warm, shielded terrace on the backside, where they could grow grapes and block out the prefabricated houses that were creeping up around them. 

This process of gradual adaptation, which Stewart Brand calls how buildings learn, is a type of coevolutionary loop, like that which fitted the orchid to the moth and vice versa: the house was changed to fit my grandparent’s life, but the house also changed them.