Raising a foundation is a repair to your house, and the city's Building Safety Department issues the permit required before a building or structure is altered or repaired. When your job needs one, we handle the application and meet the inspector on site, and if we aren't sure, we check with the city before we start.
The ground here explains a lot of what we see. A city study reports that most of the loose, creek-laid soil along Murrieta Creek sits in a liquefaction hazard zone mapped by Riverside County, meaning ground that can lose its strength when shaken. That applies to land near the creek, not to every lot in the city.
Where the soil is expansive clay that swells when wet and shrinks when dry, Riverside County's safety plan says moisture control and changing how the yard drains can limit the damage. That's why I look at where your water runs, the same check we make on jobs in Temecula and Menifee.