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    Verified excavation services reviews

Top-Rated Excavation pros in Foster City - Updated Nov 2026

Avatar for Carlos J Romero Grading and Paving Contractors, Inc.
Carlos J Romero Grading and Paving Contractors, Inc.
5.0(
2
)
Building Site - Preparation and ClearingBuilding Site - Preparation and Clearing - For BusinessExcavation - Major Grading or Resloping+2 more

Serving Foster City, CA and surrounding areas

Approved

In business since 2018

Free estimates

Emergency services offered

"CJR is all about quality, they treat you like a real customer. The team is extremely professional, they clean the site daily before leaving for the day. You and your neighbors will not even notice its a site under construction. The quality of work is far and beyond your expectations. I will continue to use CJR for upcoming projects and referrals to all my friends and family."
Response time1 day
Recommended by50%of homeowners
Avatar for Ultra Construction Group Inc
Ultra Construction Group Inc
4.4(
5
)
Excavation - Major Grading or ReslopingExcavation - Major Grading or Resloping - For Business

Serving Foster City, CA and surrounding areas

Approved

In business since 2008

Free estimates

Emergency services offered

"Gio and the entire Ultra Construction Group team are amazing. They showed up on time and were incredibly organized and their attention to detail made the project even better then I imagined. I would highly recommend this company for any concrete project big or small."
Response time2 days
Response rate90%
32 neighbors recently requested a quote
Avatar for Rocha Construction & Earthworks, Inc.
Rocha Construction & Earthworks, Inc.
3.0(
1
)
Excavation - Major Grading or ReslopingLandscape - Minor Grading or ReslopingBuilding Site - Preparation and Clearing+2 more

Serving Foster City, CA and surrounding areas

Approved

In business since 2003

Emergency services offered

Warranties offered

"This job probably would have gone much smoother if the contractor had been at the job site regularly. One man was very competent, but the help hired needed lots of supervision. And since the dryrot portion was time and materials, I was very frustrated, workers were late, talked on their cell phones, and were not efficient. The contractor's response when I told him I thought he was going to be on the job site was, "I never said I would." He relied on daily conversations with the main carpenter. This might have worked had better workers been hired. After 4 months, a second competent carpenter was higher for a short time and that went well. I think the stucco sub-contractor did a good job but they were messy. The sheetrock sub-contractor took a long time patching, often missing spots and returning. The tile sub-contractor did not lay the hand-made tile very well so I have a constant reminder on his work. The painter did an pretty good job (the stucco is very rough)."
6 neighbors recently requested a quote
Avatar for Green Infrastructure and Environmental Inc.
Green Infrastructure and Environmental Inc.
New to Angi
Building Site - Preparation and ClearingBuilding Site - Preparation and Clearing - For Business

Serving Foster City, CA and surrounding areas

Approved

In business since 2025

Free estimates

Emergency services offered

Green Infrastructure and Environmental Inc. is a licensed, insured general contractor serving San Francisco, Sacramento, and surrounding Northern California communities. We build durable, well-finished work for homeowners who want it done right the first time. \n \nOur specialties include concrete flatwork, foundations, home additions, full remodels, electrical, and paver installations. Whether you're pouring a new driveway, expanding your living space, or upgrading your home's electrical system, our crews handle the job from planning through final cleanup. \n \nWhat sets us apart: \nClear, upfront estimates with no surprises \nSkilled crews and quality materials \nReliable scheduling and honest communication \nCode-compliant work built to last \n \nWe take pride in treating every property like our own and standing behind our work. Contact us today for a free, no-obligation quote and see why our customers trust us with their biggest projects. \n \n

4 neighbors recently requested a quote
CLM Excavating, Inc.
4.6(
7
)
Building Site - Preparation and ClearingBuilding Site - Preparation and Clearing - For BusinessExcavation - Major Grading or Resloping+1 more

Serving Foster City, CA and surrounding areas

In business since 2020

Free estimates

Small jobs welcome

"Home Advisor does not have the specific category for the work that was performed of replacement of graded retaining wall up my driveway and around a structure. The work utilized excavation, concrete, wood & construction. Cristian, the owner, was the epitomy of professionalism as with every crew member. Firstly, he did not try to sell me on something I did not want, much appreciated. The job was meticulously executed in record time at the price I could pay. This job has been on my bucket list for years... finally completed with a job well done!"
Basement
Basement
Basement
Basement
Electrical conduit

+28

Response time1 day
Recommended by100%of homeowners
Vargas Landscaping
4.7(
48
)
Building Site - Preparation and ClearingBuilding Site - Preparation and Clearing - For BusinessExcavation - Major Grading or Resloping+2 more

Serving Foster City, CA and surrounding areas

In business since 1999

Free estimates

Emergency services offered

"We bought a 'fixer-upper' and of all the contractors (and we have worked with A LOT on this house) he is the top. He is prompt, he always follows through, his team works hard and gets the job done fast and well. If there are any concerns he comes out personally and takes care of them immediately. He is flexible and thinks on his feet. His pricing is very reasonable. There wasn't a thing that we didn't like about working with Nato and team. He is our official go to guy for landscaping and other projects. We trust Nato, his work and recommendations to us We would definitely recommend him to our friends. My husband found him on Angie's list and it was one of the best finds we have had in the 3 years we owned the house."
Recommended by95%of homeowners
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Showing 1-10 of 76
Excavating FAQs, answered by experts

Septic drain lines (or leach lines) are typically buried between 18 and 36 inches underground, and should be at least 6 inches below the surface. These pipes are perforated and surrounded by filtering materials like sand or gravel. Burying the lines at this depth helps minimize odors and allows bacteria and other biological processes in the soil to effectively treat the wastewater. Burying lines too close to the surface can cause issues unless the soil is very compact and stable.

If you don’t wish to dig it out and convert it into a finished basement, you can still encapsulate your crawl space to protect it from damage for an average cost of $5,500. Finishing a crawl space beyond this isn’t really worthwhile, as the low ceilings mean you won’t be able to use the area as living space.

There are several methods to hollow out a tree stump, and the best one depends on your tools, experience, and priorities. Common methods include using a chisel and hammer, a chainsaw, or burning.

  • Chisel and Hammer: This is often considered the easiest approach for those with limited tools or experience, though it is the most time-consuming.

  • Chainsaw: Using a chainsaw is the fastest method, but it comes with significant safety risks, especially for inexperienced users.

  • Burning: This can be an effective method, but it is not recommended unless you can first drill holes into the stump. Without holes, the stump will be difficult to light and may not burn completely through.

A power drill with at least a ⅜-inch diameter bit can make the job quicker and easier, regardless of the primary method. While you can use a chisel or chainsaw without a drill, it will require more time and effort. Always wear protective goggles and thick gloves, as splinters are an inevitable risk.

A perc test can take anywhere from one to eight hours to complete. The total time depends on factors like the amount of excavation required, the depth and width of the holes, and whether multiple test holes are needed. For a single hole, the process of filling it with water and monitoring the drainage rate usually takes less than an hour. Professionals can often complete the entire test in a single day. While it's possible to get results the same day, some companies may take a few days to provide the official report.

Yes, you can technically make a crawl space liveable, but the only way to do so is by converting it into a basement. While some crawl spaces are big enough to walk through and store large items, they lack appropriate insulation and space to be liveable.

The Foster City, CA homeowners’ guide to excavation services

From average costs to expert advice, get all the answers you need to get your job done.