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TRUSTED BY JAFFREY, NH HOMEOWNERS

  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon27
    Verified excavation services reviews

Top-Rated Excavation pros in Jaffrey - Updated Nov 2026

McAdams Excavation & Landscaping
3.9(
27
)
Landscape - Minor Grading or ReslopingExcavation - Major Grading or ReslopingExcavation - Major Grading or Resloping - For Business

Serving Jaffrey, NH and surrounding areas

Approved

In business since 2017

Free estimates

Small jobs welcome

"The attention to detail of the work was top rate. We had three sink holes in our yard that they took care of for us, as well as spreading loam for us to start a lawn in the spring. I very highly recommend McAdams Excavation."
Response time1 day
21 neighbors recently requested a quote
Recommended by85%of homeowners
Alliance company
New to Angi
Building Site - Preparation and ClearingExcavation - Major Grading or ReslopingBuilding Site - Preparation and Clearing - For Business

Serving Jaffrey, NH and surrounding areas

Approved

Owned and operated by Jide Williams, Alliance is a full-service site preparation and excavation company. We specialize in transforming raw land into build-ready sites through expert grading, land clearing, and demolition. Whether you need materials delivered, debris hauled out, or complex tank and stump removal, we provide the heavy equipment and the "lead contractor" expertise to keep your project on schedule and on budget.

Retaining wall
Retaining wall
Process
Retaining wall
Retaining wall

+33

3 neighbors recently requested a quote
Avatar for Cullen Excavating
Cullen Excavating
4.8(
5
)
Building Site - Preparation and ClearingBuilding Site - Preparation and Clearing - For BusinessExcavation - Major Grading or Resloping+2 more

Serving Jaffrey, NH and surrounding areas

In business since 2010

Free estimates

Small jobs welcome

"Brian and his team excavated 3 areas of our yard and prepped the sites for sheds and pool house. Brian was very responsive, professional and completed all work in the timeframe discussed. Costs were provided upfront and work done was great quality. We plan to use Cullen Excavating again for another project in the near future. Highly recommend!"
My work
My work
My work
My work
My work

+167

Response time5 hrs
Response rate98%
Recommended by100%of homeowners
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Excavating FAQs, answered by experts

Sewer lines can be buried anywhere from 18 inches to 8 feet deep, with a common average depth between 18 and 30 inches. The exact depth depends on local factors like climate and soil type. In colder regions, pipes must be buried deeper (below the frost line) to prevent freezing, sometimes as deep as 8 feet. The digging depth can also impact the cost of sewer line replacement. To find the specific depth for your property, you can check the building plans for your system, which should be on file with your city or local sanitation department since permits are required for installation.

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.

To locate an underground downspout, you should start by identifying where the above ground gutter drains. Look for an entry point, such as a pipe or elbow leading into the ground. Follow the surface path for signs like depressions, landscaping disruptions, or wet areas after rain. You can use a metal detector or plumber’s snake to trace the pipe underground. For deeper pipes, a professional locator tool or camera inspection may be necessary. Visual markers or utility maps can also guide the search.

Most states do not require excavation companies to hold specific licenses, but many require at least a contractor’s license. Additionally, heavy equipment operators require a special commercial equipment license to operate machinery required for excavation. You can use Angi’s contractor licensing tool to confirm that an excavation company you’re considering hiring is fully licensed. You should also make sure that the excavation team is fully insured before allowing them to work on your property.

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 Jaffrey, NH homeowners’ guide to excavation services

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