What excavation costs in San Diego
Excavation in San Diego runs $150 to $300 an hour for a machine with an operator, and the common projects have honest ranges: ADU site prep $8,000 to $25,000, utility trenches $25 to $80 per foot, pool removals $6,000 to $20,000 and slope work $5,000 to $30,000. What moves a job inside its range is nearly always one of three things: the access that decides which machine fits, the destination of the excavated dirt and the ground itself, which changes from river sand to weathered granite across a few miles of this county. The table below is the one we quote from, and the invoice matches the quote.
The published table
| Project | Typical range | What moves the price |
|---|---|---|
| Machine and operator, hourly | $150 to $300/hr | Machine size and terrain |
| Mobilization, equipment in and out | $200 to $600 | Distance and trailer moves |
| ADU pad and site prep package | $8,000 to $25,000 | Slope, access and utility runs |
| Building pad grading, per pad | $3,000 to $12,000 | Cut-and-fill volume, compaction spec |
| Utility trench, per linear foot | $25 to $80 | Depth, soil and surface restoration |
| Sewer lateral trench and backfill | $3,500 to $12,000 | Depth to main, hardscape above |
| New pool excavation | $2,500 to $8,000 | Access and what the ground hides |
| Pool removal, partial fill | $6,000 to $12,000 | Shell break-up and import fill |
| Pool removal, full for building | $9,000 to $20,000 | Complete shell out, engineered fill |
| Slope repair and erosion grading | $5,000 to $30,000 | Volume, access and geotech scope |
| Retaining wall cut and backfill | $2,000 to $10,000 | Wall height and drainage stone |
| Footing and foundation excavation | $2,000 to $9,000 | Depth and hand-work share |
| Small structure demo and haul-off | $4,000 to $15,000 | Material type and disposal |
| Spoil export, per truckload | $150 to $400 | Haul distance and loading access |
| Emergency call-out (utility failure, storm) | $500 to $1,000 + hourly | Nights and weekends |
Ranges reflect residential and light commercial work across San Diego, east county and the south bay. The free site walk turns your project into an exact written number.
The three questions that price your dig
What machine fits? A wide side gate admits a full-size excavator that moves serious dirt per hour. A 36 inch gap between house and fence means compact equipment making many more passes, and hillside lots sometimes mean a long-reach machine working from above. The machine sets the pace and the pace sets the hours, which is most of the spread on any quote.
Where does the dirt go? Excavated soil (the trade calls it spoil) swells by roughly a quarter and a modest ADU pad can generate hundreds of cubic feet of export. Spreading it on your own property costs almost nothing; trucking it away costs $150 to $400 per load. This single answer swings small projects by thousands, so we ask it first.
What is the ground? San Diego geology is honest about nothing. River valleys dig like sand, the mesas carry cemented soils, and the east county hills hide granite that stops buckets cold. We probe during the site walk and write what we find into the quote, which is why our numbers survive contact with the dirt.
Cost questions, answered
Why do excavation quotes vary so much for the same yard?
Because most quotes are one number covering machine time, trucking, disposal fees and risk padding without saying which is which. Our table prices the pieces separately, so any quote you collect can be decomposed against it and compared honestly.
What is the single biggest cost surprise in San Diego digs?
Export trucking. Dirt swells about 25 percent when excavated and a small pad can produce twenty truckloads. At $150 to $400 a load, a place to spread the dirt on your own property is worth thousands, which is why the question appears in our estimator before anything else.
Does hitting rock change a fixed quote?
Not if the quote was built right. We probe the cut line during the free site walk, and where the neighborhood geology suggests granite or cobble the quote carries a stated allowance instead of a surprise change order. If truly unforeseeable rock appears, the hourly breaker rate is already published and the conversation happens before the work does.
What does the 811 requirement mean for my schedule?
California law requires the free DigAlert notification at least two working days before excavation, so a dig booked today legally starts no sooner than the marks allow. We file it for every job as routine, and the lead time disappears into normal scheduling rather than delaying you.
Sources worth reading before any dig contract: California’s one-call law and the free utility marking service live at digalert.org, the Contractors State License Board lets you verify any contractor license free at cslb.ca.gov, and the City of San Diego publishes its accessory dwelling unit rules and permit requirements at sandiego.gov.
Turn the range into a number
A free site walk pins your project to an exact written figure off this table.Cabrillo Excavation answers the same day.