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Top-Rated Excavation pros in Prosser - Updated Nov 2026

3H Excavation
5.0(
2
)
Building Site - Preparation and ClearingBuilding Site - Preparation and Clearing - For BusinessExcavation - Major Grading or Resloping+1 more

Serving Prosser, WA and surrounding areas

In business since 2012

Offers commercial services

"Darren did an excellent job . Arrived in a timely manner, explained options and then got to work. He came back the next day to clear the snow that had continued to fall . I would recommend him."
Response time1 day
Recommended by100%of homeowners
Avatar for KT'S Construction Services, LLC
KT'S Construction Services, LLC
4.2(
13
)
Building Site - Preparation and ClearingExcavation - Major Grading or ReslopingLandscape - Minor Grading or Resloping

Serving Prosser, WA and surrounding areas

In business since 2008

Free estimates

Credit card accepted

"We hired Dave to do a entire Kitchen makeover. Dave is the most professional contractor we have worked with. Dave was extremely through, looking out for our interest with subs he hired. Dave receptive to our ideas and worked to facilitate our requests. Our appliance dealer commented that Dave was the most hands on contractor they had meet. We have additional projects coming up in the future and plan to use Dave Laube as our contractor. We recommend anyone planning a remodeling project, talk with Dave Laube to see what he could do for them."
Response time4 hrs
Recommended by91%of homeowners
Cobian Excavation LLC
5.0(
4
)
Excavation - Major Grading or ReslopingExcavation - Major Grading or Resloping - For BusinessLandscape - Minor Grading or Resloping

Serving Prosser, WA and surrounding areas

In business since 2002

Free estimates

Credit card accepted

"I recently hired Cobian Excavation for a significant excavation project, and I couldn't be more satisfied with their service. From the initial consultation to the final clean-up, their professionalism, efficiency, and expertise were evident every step of the way. The team was punctual, well-equipped, and highly skilled, completing the project on time and within budget. They navigated unexpected challenges with ease, demonstrating their extensive experience in the field. Communication was clear and consistent, ensuring I was informed and confident throughout the process. The quality of their work exceeded my expectations, and their attention to detail ensured a flawless result. I highly recommend Cobian Excavation for any excavation needsâ they truly deliver outstanding service and results."
Response time1 day
Recommended by100%of homeowners
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Excavating FAQs, answered by experts

A trench that is less than 5 feet deep often doesn't require a protective system. Most residential trenches will not go this deep (the typical residential drainage trench is just 18 inches deep). In the event that an excavator needs to dig more than 5 feet beneath the surface, a protective system is required unless the excavation is in entirely stable rock.

There are several different factors that influence how long it takes to excavate. For a foundation, it could take anywhere from three days to three weeks. It can take even longer if you face weather-related delays or an inaccessible site that’s riddled with boulders and rough terrain. It may also take longer if you have clay soil, which is more difficult to dig.

How deep your septic system needs to be into the ground depends on several factors. In extremely cold environments, the tank needs to rest below the maximum frost line, which can be up to six or eight feet deep. The standard burying depth for most systems is between a few inches and four feet below ground level. Depth can also depend on the slope of the landscaping and other property variables. 

Trenchers can dig holes as narrow as 4 inches or as wide as 4 feet. Check the specifications of the trencher you rent or buy to determine how wide it will cut into the landscape. Better yet, let the excavation company know how wide you’d like the trench to be, and they can help you choose the right trencher for the job (or do it for you).

Yes, you can install a trench drain if you already have concrete in your yard or garden. While it can complicate some aspects of the job and slightly run up the cost, it is doable. Residential trench drains can be easily retrofitted to outdoor areas with concrete without having to remove excessive amounts of your patio, pool area, or decorative walkways.

The Prosser, WA homeowners’ guide to excavation services

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