Foundation work in Simi Valley
Simi Valley charges $708.30 for "Foundation Repair / seismic upgrade" per 200 lineal feet of foundation, on a fee schedule effective July 1, 2023. A Standard Plan retaining wall is $410.01 for the first 100 lineal feet and $171.69 for each further 100. Special Design walls up to 6 feet high cost $410.01 for the first 100 lineal feet, and $522.04 per 1,000 square feet once they pass 6 feet.
Those are 2023 amounts, so ask the counter for the current schedule. Most buildings and structures in Simi Valley must be designed by an architect or engineer registered with the State of California, the Building Safety Division says. Drawings go in with structural engineering calculations, engineer reports and specifications. It won't do the Foundation Inspection until footing excavations are done and all forms and reinforcing steel are in place. Keep the stamped, approved plans on site.
For online submittal help, the division's line was (805) 583-6723 as of April 2026. At the city line, liquefaction zones show up on four CGS quadrangle maps, slide zones from shaking on four as well, and fault-rupture zones on two. Whether one covers your lot is a separate question. Housing here dates to a median year of 1980. Grading runs through Public Works on a separate application and permit form, which, in an October 2025 copy, asks for stockpile or regular grading, cut, excavation, fill and import quantities, and a bond. The form gives (805) 583-6786 for the 24-hour advance notice to the grading inspector.
What foundation work costs near Simi Valley
No one has sent us a quote for Simi Valley, so there's no city price here. The California page lists the estimates beside what the trades are paid, which is a wage and isn't a price ($34.09 an hour in the BLS wage data). How we estimate costs. Whoever you call, ask for an itemized written price.
Permits for foundation repair work in Simi Valley
If Simi Valley has its own building department, start there and ask who issues permits for foundation, waterproofing and sump work.
The California Building Standards Code says no structure may be altered, repaired or improved without a permit from the building official, and CSLB adds that requirements vary by city and county. The building department for your address decides whether a given foundation, waterproofing or sump job counts.
Foundation jobs in Simi Valley
Sources for Simi Valley
- Fee schedule effective July 1, 2023, City of Simi Valley Read Oct 23, 2026.
- Building Construction Overview, City of Simi Valley Building Safety Division Read Oct 23, 2026.
- Grading Permit application, City of Simi Valley Public Works Read Oct 23, 2026. Confirm it with the source itself before relying on it.
- CGS Seismic Hazard Zones: liquefaction zones Confirm it with the source itself before relying on it.
- ACS 5-year B25034 Year Structure Built Confirm it with the source itself before relying on it.
- Online Permit Submittal Instructions, City of Simi Valley Read Oct 22, 2026.