A rear yard in Mission Viejo was shaped by the grader before the house went up, with the pad pitched away from the foundation to a swale or an area drain and, on a hillside lot, a slope falling away behind the fence. A patio is a sheet of concrete laid across that drainage path. Poured flat, or pitched toward the house or the slope, it holds water where the pad was built to move it, and standing water on a fill pad is what makes a rear yard settle.
Saddleback Mission Viejo Concrete pours the patio to the pad's own fall. The swale or the drain the grader left is found first, the slab is pitched a quarter inch in every foot toward it, and a drain box is cast in where the water crosses. Trevor Lindqvist has spent 17 years on rear yards in south Orange County and lays the fall out with a level and string before the first form board, so the water's route is decided before the pour, not by where the concrete lands.
The slab is poured to the California Residential Code under a CSLB C-8 license, with liability insurance on every job. It finishes 2 inches below the stucco weep screed so the wall can drain, and it stops short of the slope, because a patio poured to the edge sends its run-off over the fill below. A slab on the ground needs no City permit; a cover over it does, and we file that. The patio carries a written workmanship guarantee against defects in how it was built.