Slope stabilization
At a glance: Unlimited Drilling & Foundations groups slope stabilization with erosion control, retaining walls and drainage.[1][2] A real hillside repair starts with a geologic assessment and a permit path, then a contractor’s access and methods.
The company’s slope work
Unlimited Drilling & Foundations says it specializes in slope stabilization, erosion control and drainage systems, and that it uses block or wood walls, French drains and concrete swales among its tools.[1][2] That combination — structure plus water control — is the usual way a hillside problem is actually solved. A wall that ignores drainage, or a drain that ignores the failing scarp, is only half a job.
What a landslide problem is (generally)
The U.S. Geological Survey describes landslides as the movement of a mass of rock, debris or earth down a slope, triggered by factors that include rainfall, earthquakes, grading and changes in groundwater.[3] San Diego County has both coastal bluffs and inland slopes; winter storms can load a weak plane in the soil or in fill. This paragraph is general geology, not a map of this company’s jobs.
What owners usually need first
A competent response starts with a geologic or geotechnical assessment, not with a crew on site. The assessment should identify the material that is moving, the groundwater, the risk to the house or the street, and the alternatives.[3][4] Only then does a contractor’s access plan and equipment list become useful. The company’s limited-access rigs and mini crane are relevant after that design exists.[5]
Agencies
City of San Diego Development Services and County Planning & Development Services are the usual starting points for permit questions inside and outside the city, respectively.[6][4] Coastal sites can involve additional review. None of that is waived by hiring a licensed contractor.
What “stabilization” can mean, and what it does not
Slope stabilization is a family of methods, not a single product. It can include drainage, regrading, retaining structures, deep foundations, tie-backs, surface protection, or a combination. The company names walls, French drains and concrete swales among its tools and groups them with erosion control.[1][2] USGS background on landslides is cited here only as general science: rainfall, earthquakes, grading and groundwater can all trigger movement.[3]
A proposal that jumps straight to a wall without saying what is moving, and why, is incomplete. Equally incomplete is a drain that leaves an over-steep, unsupported cut. The company’s limited-access equipment is relevant when a designed fix has to be built on a narrow or steep lot; it does not replace the geologic assessment.[5]
Emergency shoring after a storm is a different conversation from a permanent designed repair. This wiki does not claim that Unlimited Drilling offers a 24-hour emergency service, because the official pages reviewed for this build do not make that claim. Hours on the contact page and on Google are weekday, 8am to 6pm.[7][8]
Questions readers ask
Is slope work the same as a garden retaining wall?
Not always. A wall that is holding a failing slope or protecting a structure is a designed system, often with drainage and deep elements.
Should I wait until after a storm?
Fresh movement after rain is a reason to get advice quickly, especially if a structure or a street is at risk. This is general caution, not an emergency-service claim by the company.
Does the company claim a separate landslide job count?
It claims more than 1,000 projects of all types. It does not, in the pages reviewed, publish a separate landslide count.
Related articles
Notes and sources
- ^ a b c Best Foundation Repair San Diego (home page). Unlimited Drilling & Foundations (unlimiteddrilling.com). Retrieved 9 November 2026.
- ^ a b c Slope Stabilization. Unlimited Drilling & Foundations (unlimiteddrilling.com). Retrieved 9 November 2026.
- ^ a b c Landslides 101. U.S. Geological Survey. Retrieved 9 November 2026.
- ^ a b Planning & Development Services. County of San Diego. Retrieved 9 November 2026.
- ^ a b Equipment and Resources. Unlimited Drilling & Foundations (unlimiteddrilling.com). Retrieved 9 November 2026.
- ^ Geologic hazards and hillside development information. City of San Diego Development Services. Retrieved 9 November 2026.
- ^ Contact Unlimited Drilling & Foundations Inc.. Unlimited Drilling & Foundations (unlimiteddrilling.com). Retrieved 9 November 2026.
- ^ Unlimited Drilling & Foundations, Google Business Profile (CID 15018109920434869519). Google Maps. Retrieved 9 November 2026.