Positioned on a concrete wall near the back of the house, the 'eyeball’, a hammered-brass light fixture inserted into a round opening by Unitfive Design, is a fun little detail that gives the home an extra layer of 'interest and personality,’ says Mr. Mandel. ‘Houses at this level of customization are an assembly of 10,000 decisions,’ he says, so when a person is offered ‘little moments that you can control, when you can doodle as you’re on the phone talking about HVAC,’ he laughs, things become enjoyable again.Ben Rahn