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*The Angi rating for Excavation companies in Gillette, WY is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Excavation needs.

*The HomeAdvisor rating for Excavation companies in Gillette, WY is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Excavation needs.

Last update on February 08, 2026

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Avatar for RJM Concrete Design
RJM Concrete Design
5.0(
4
)

Serving Gillette, WY and surrounding areas

Approved

In business since 2023

Free estimates

Warranties offered

"Justin did a great job putting in a back patio and sidewalk in a very small space I’m really pleased with how it turned out and recommend his company for any residential project."
Patio Steps
Rear Pfatio
Front Patio
Broomed Patio
Water Treatment Channel

+1

Response time11 hrs
Response rate96%
7 neighbors recently requested a quote
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Avatar for Cothren Plumbing & Construction
Cothren Plumbing & Construction
5.0(
10
)

Serving Gillette, WY and surrounding areas

In business since 2013

Free estimates

Emergency services offered

"Alex was efficient, professional and friendly and arrived as soon as he could get here. We were having sewer trouble and he stayed to see that the problem was fixed and we were no longer having problems with the sewer, even though it was after dark before he packed up his tools. We would definitely recommend Cothren Plumbing and Construction for any of your construction or plumbing needs."
Lovell Senior Center
Lovell Senior Center
New Deck & Concrete
New Deck & Concrete
New Deck & Concrete

+2

Response time3 hrs
Response rate100%
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Excavating questions, answered by experts

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.

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.

Your contractor should handle dust control during the project. It's best to speak with your contractor beforehand to check if they plan to cover your furniture, protect your vents, or use fans to redirect dust. Eliminating drywall dust is a particularly large challenge during construction, so always take this into account during your planning phase.

If you don’t have a crawl space but have a partial basement you want to make deeper, you can expect to spend a little less—between $40,000 and $90,000 on average. However, if you’re not adding new finished square footage, you won’t see much in the way of ROI.

Landscape edging is more DIYable than trenching. You can DIY your own digging projects, but proceed carefully and only with proper knowledge of the equipment and appropriate safety measures in place. Keep in mind the project's scope and estimate how long it will take you to do it on your own. While you can certainly save money by DIYing home improvement projects, you can’t exactly hide an unfinished—or worse, ruined— landscaping job from the neighbors. It’s always safer to call an excavation pro near you to get an estimate.

The Gillette, WY homeowners’ guide to excavation services

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

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