Less measuring than you'd think, more standing still and watching how the light and the family move.

A first site visit looks less like architecture and more like observation. We walk the space at whatever time of day the client can meet, note where the light lands, ask where the family actually spends time versus where they think they spend time, and try to notice the small frictions nobody's mentioned yet — a doorway that's always in the way, a corner that never gets used.
Measurements happen, but they're the least important part of the visit. What we're really trying to build is a sense of how the household moves through a day, because that's what the plan eventually has to serve.
By the time we leave, we usually have more questions than we arrived with — which is the point. The brief gets written after the visit, not before it.