Direct Answer: Sonoma County can require you to retroactively permit old retaining walls and grading through an as-built permit process, which typically involves engineering reports,

Direct Answer: An excavation contractor opens and prepares the earth. A foundation contractor pours the concrete. They are two separate trades, and the excavation always

Direct Answer: FEMA’s January 2026 flood map update places roughly 2,500 Santa Rosa properties in high-risk flood zones, triggering new drainage, grading, and foundation elevation

Direct Answer: A site plan coordinates grading, drainage, setbacks, and cut-fill volumes for permit review. Get the contours wrong in Sonoma County and your permit

Direct Answer: A building pad is a precisely graded and compacted earth platform that supports a foundation or slab. It requires engineered soil preparation, proper

Direct Answer: Permit Sonoma launched a Grading Self-Certification Program in April 2026, allowing approved licensed professionals to certify qualifying grading work themselves — potentially cutting

Direct Answer: Most drainage trenching fails because of design errors, not bad materials. If the outlet location, pipe diameter, and soil permeability aren’t matched to

Direct Answer: Yes, residential excavation in Sonoma County has several hard limits — permit thresholds at 50 cubic yards, required utility notifications, property line setbacks,

Direct Answer: A retaining wall on a slope fails or succeeds based on what happens before the wall goes in — specifically how the slope

Direct Answer: Creek bank erosion on a riparian lot requires a site-specific solution — rip-rap, bioengineering, or a structural wall — plus permits from multiple

Direct Answer: In most cases, yes. Sonoma County requires an engineered grading plan for cuts or fills over 50 cubic yards. Monterey County’s threshold is

Direct Answer: Replacing a septic system in Monterey County requires permits from Environmental Health under the county’s LAMP framework — not just the building department.