A big chunk of Cupertino sits on the valley floor, with lots that are close to flat and soil that holds water. On those properties, the most common call we get is some version of "the backyard stays soggy." Often the patio isn't the problem. The grade is. Water has nowhere to go, so it sits against the foundation or pools on the lowest corner of the lot.
That's why a paver patio here usually starts with a drainage plan. We set elevations from the house, run a minimum 2 percent slope away from the structure, and tie in catch basins or a French drain where the water has to travel farther than the surface can carry it. Perforated pipe goes in with the holes down, wrapped in fabric, bedded in clean washed drain rock.
None of that shows up in the finished photos, which is exactly why it gets skipped on jobs that go to the lowest bidder. If you've got a backyard that stays wet into spring, we'd rather deal with the water before we put expensive material on top of it.