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    Average homeowner rating
  • Verified reviews icon11
    Verified excavation services reviews

Find Excavation pros in Saint Helena

Avatar for Castaneda Grading & Excavating
Castaneda Grading & Excavating
5.0(
23
)
Building Site - Preparation and ClearingExcavation - Major Grading or ReslopingLandscape - Minor Grading or Resloping+2 more

Serving Saint Helena, CA and surrounding areas

Approved

In business since 2020

Free estimates

Credit card accepted

"Humberto is a very creative problem solver! Personable and definitely interested in customer satisfaction, so spends time understanding the full scope of the problem. The problem was the subterranean north wall of the sanctuary of First Presbyterian Church in Vallejo that was far from being waterproof, especially with the rains last winter. Castaneda dug out the soil next to the wall, pressure washed it and applied two coats of DryLok and then a layer of Henryâ s waterproofing. Then Humberto installed a French drain and then a big pipe to route the water off of five downspouts. To get the correct drainage slope, more excavating needed to be done than anticipated. Removed five landscaped trees and lots of concrete that was in the way of the drains which were to be routed under city sidewalks."
Garden
Graded
Finished driveway
Final slope grade
Finish grade 4 inches below sidewalk

+77

Response time1 day
Response rate96%
21 neighbors recently requested a quote
JOHN MOUNTAIN
5.0(
7
)
Building Site - Preparation and ClearingBuilding Site - Preparation and Clearing - For BusinessExcavation - Major Grading or Resloping

Serving Saint Helena, CA and surrounding areas

Approved

In business since 2021

Free estimates

Offers commercial services

"I cannot say enough about how good this experience with John Mountain/Mountain Engineering has been. They said it would be 3 weeks; anti was. The work was painstakingly done, including a French drain behind the wall. And they replaced the plants that were destroyed during the process, which was an unexpected bonus."
Response time10 hrs
10 neighbors recently requested a quote
Recommended by57%of homeowners
Avatar for De Haro Landscaping
De Haro Landscaping
4.7(
12
)
Landscape - Minor Grading or Resloping

Serving Saint Helena, CA and surrounding areas

Approved

In business since 2019

Free estimates

Emergency services offered

"Rafael did an excellent job repairing my fence. I will highly recommend him for any project based on how he completed this one so thoroughly. Thank you again for a job well done. It was a pleasure meeting you."
Front yard Landscape
Front yard Landscape
Front yard Landscape
Front yard Landscape
Front yard Landscape

+17

Response time2 days
2 neighbors recently requested a quote
Recommended by90%of homeowners
Juan Contreras Landscaping
5.0(
6
)
Landscape - Minor Grading or Resloping

Serving Saint Helena, CA and surrounding areas

Approved

In business since 2019

Free estimates

Customers say: Quick response

"I hired Juan to redo my front yard. He removed the old lawn, updated the irrigation, and designed the new landscape. He did an amazing job and I am extremely happy with the finished project. He was on time and always communicated any changes. Juan and his team where friendly and professional throughout the entire project."
Response time3 hrs
4 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for E G Paving Construction, Inc.
E G Paving Construction, Inc.
5.0(
2
)
Excavation - Major Grading or ReslopingExcavation - Major Grading or Resloping - For Business

Serving Saint Helena, CA and surrounding areas

Approved

In business since 2019

Free estimates

Small jobs welcome

"Edgar and his employees were amazing. Their bid was the best. Other guys said they would have to rip up pavement that this crew could do no problem minimally. The guys were so well groomed and polite. Not that that matters but it was an extra bonus. Lovely crew and incredible job in a few days. I will for sure use them again."
Driveways
Building pads
Concrete patio
Preparation
Asphalt pave

+4

Response time2 days
18 neighbors recently requested a quote
Recommended by50%of homeowners
Demar, Inc.
5.0(
1
)
Excavation - Major Grading or ReslopingBuilding Site - Preparation and ClearingLandscape - Minor Grading or Resloping+2 more

Serving Saint Helena, CA and surrounding areas

Approved

In business since 2000

Free estimates

Offers commercial services

Demar Inc. proudly serves its customers with pride, integrity, and attention to the details that matter most to you. This is one of the many things, that set us apart from the rest. We are locally owned and operated. Give us a call today!

4 neighbors recently requested a quote
Recommended by100%of homeowners
JG LANDSCAPE CONSTRUCTION
5.0(
1
)
Landscape - Minor Grading or Resloping

Serving Saint Helena, CA and surrounding areas

Approved

In business since 2025

Free estimates

"Julian and crew are fantastic and are perfectionists. They do the job right and more which is rare. I had them install a colored cement pad and a 12 x 14 gazebo on the pad. .All was done to perfection. Normally I am nervous when I have contract work done however this company made me so relaxed. They delivered better than high quality work as well as total communication. I am so happy to have found this company and will use them for future projects."
Response time1 day
3 neighbors recently requested a quote
Raya Engineering
New to Angi
Building Site - Preparation and ClearingBuilding Site - Preparation and Clearing - For BusinessExcavation - Major Grading or Resloping+2 more

Serving Saint Helena, CA and surrounding areas

Approved

In business since 2011

Free estimates

Emergency services offered

Here at Raya Engineering, we sustain our company on the principal that our customers come first. We offer services that are tailored to your needs and we're ready to show you what our experience can bring to your project! Call us today!

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Excavating questions, answered by experts

The best way to protect tree roots is to avoid the roots entirely by excavating outside the root radius of the tree. For nearby projects, it’s a good idea to construct a temporary retaining wall. But that’s not always possible, depending on the project and the root system. In these cases, consider using alternative equipment like an auger to tunnel under the ground.

Remember, tree roots can damage nearby cement foundations as they grow. If a tree is close enough to interfere with large excavations, it may be better to remove the tree than risk future problems.

The physical constraints of hand-drilling a well limit the depth you can achieve. Manually digging with picks and shovels may only lead to shallow wells of up to 60 feet in depth. To reach greater depths, you need more specialized equipment. The diameter of your well and the tools you’re using will determine how far down you can dig.

It can take several weeks for the ground to settle after removing a tree, and the soil under larger, more mature trees can take months. The deeper the tree has been ground under the soil, the longer it will take to settle. However, this extra depth can help you plant new landscaping sooner because you’ll have more space for fresh soil.

You can dig 60 to 80 linear feet by hand per day depending on the depth. Digging a 100-foot trench by hand will take you two work days, but it can take longer if you have heavy or rocky soil. If you’re digging a deep trench or one that’s over 100 feet, consider renting a mechanical trencher, such as a walk-behind or ride-on, or calling a pro for help. 

There is no standard depth for burying a septic tank; they are typically buried anywhere from 4 inches to 4 feet underground. The final depth depends on several factors, including the depth of your main sewer line, the height of the bedrock, soil type, local regulations, and the property's landscape. If you plan to grow grass or plants over the tank, a depth of at least 4 to 6 inches is recommended. Deeper tanks can be more difficult to locate, but a septic professional can help find it for you.

The Saint Helena, CA homeowners’ guide to excavation services

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