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  • Average homeowner rating star icon4.8
    Average homeowner rating
  • Verified reviews icon54
    Verified excavation services reviews

Top-Rated Excavation pros in Plaistow - Updated Nov 2026

Avatar for SPERO BROTHERS CONSTRUCTION LLP
SPERO BROTHERS CONSTRUCTION LLP
4.8(
25
)
Excavation - Major Grading or ReslopingBuilding Site - Preparation and Clearing

Serving Plaistow, NH and surrounding areas

Approved

Super Service Award Winner

In business since 2008

Free estimates

Credit card accepted

"The Spero Bros. Ccnstruction was amazing. Thy are polite, clean up the project when done and true to their word. Extremely satisfied......great guys and true to their quote. Dave & Nate are a great team . They replaced the liner in our chimney, capped the top off and repaired the chimney on the roof. Completely recommend them and I will hire them again in a . heartbeat."
We Love What We Do And So Will You
We Love What We Do And So Will You
We Love What We Do And So Will You
We Love What We Do And So Will You
We Love What We Do And So Will You

+25

Response time2 days
4 neighbors recently requested a quote
Recommended by87%of homeowners
Smithtown Landworks
5.0(
5
)
Landscape - Minor Grading or Resloping

Serving Plaistow, NH and surrounding areas

Approved

In business since 2022

Free estimates

Small jobs welcome

"I hired Matt to prepare a site for a shed we have ordered. He replied promptly for a request for an estimate. He explained what needed to be done and gave me a fixed date when he could do the work. Throughout the project, he kept me apprised of the progress and explained the choices that needed to be made. I was impressed with the care with which he approached every aspect of the project. Just a great guy to work with."
Response time5 hrs
2 neighbors recently requested a quote
Recommended by80%of homeowners
Avatar for BEAR ROCK HARDSCAPES LLC
BEAR ROCK HARDSCAPES LLC
5.0(
8
)
Landscape - Minor Grading or Resloping

Serving Plaistow, NH and surrounding areas

Approved

In business since 2006

Free estimates

Credit card accepted

"Dan Gallant of Bear Rock Hardscapes did an excellent job designing & installing a curved walkway made of different colored pavers. The walkway improved the overall impression of my home. When friends saw the walkway, they hired Dan to install a walkway or patio at their houses. I would hire Dan again."
Project Photos
Steps
HARDSCAPES
HARDSCAPES
WALKWAY

+20

...
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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.

Prior to excavation, you should prepare the dig site and call 311 before you sign anything.

To get your site ready for excavation, you should move anything in the area that isn’t affixed to the land. You can save money on the excavation by removing hardscaping, including walkways, decks, concrete patios, and paver patios.

Before you carry out any digging, you should call 311 to confirm that there are no utility lines running through your excavation site. Skipping this step could lead to severe injury and property damage if your excavator hits a water, sewage, or gas line.

Concrete blocks are the cheapest way to base a shed. However, the space in between allows critters to go under, burrow, and even damage your shed’s frame. For a more pest-proof option, consider building a shed base with gravel or paver stones. Both options are fairly affordable and easy enough for a DIY project. For gravel, you can build a wooden frame to contain the loose material.

Excavations take a few days or up to a few weeks. The time it takes to excavate an area depends on the size of the area, the type of soil, the type of excavator, and even the time of year, since winter can make digging up the ground more difficult.

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.

The Plaistow, NH homeowners’ guide to excavation services

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