Steps fail by dropping, not by cracking. A flight poured on the loose fill behind a porch settles a little every wet winter, and because the house it meets is on a footing and does not settle, the top riser grows and the bottom one shrinks. The California Residential Code allows 3/8 of an inch between the tallest riser in a flight and the shortest, and a flight that has dropped an inch is a trip at the front door. The cure is a footing that reaches the ground the house stands on.
Harbor Fullerton Concrete has built steps this way since Grant Yoshida started it in 2021, after 14 years on north Orange County crews, and he sets the top riser off the threshold himself. The flights here divide by age. Behind a postwar tract door there are one or two risers off a slab, poured onto whatever the grader left; on the raised-floor houses around downtown and Hillcrest Park, four or five up to a porch; and on the hill lots the garden flight had no footing.
Each flight is formed to the Residential Code, risers no taller than 7 3/4 inches, treads no shallower than 10, a handrail formed for wherever four or more risers stand, and a flight that changes an exit or stands over 30 inches above grade is filed with the city's Building and Safety counter before the pour. The work is licensed CSLB C-8, carries liability insurance on every job, and leaves with a written workmanship guarantee against defects in how it was built.