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Ultimate Excavation LLC
Crew member standing beside a mini excavator at the edge of a pool excavation

Based in Caldwell, Idaho

Excavating contractor

A Caldwell-based excavating contractor working in Boise and across the Treasure Valley.

Highly rated
5.0
Owned & operated
Local
BBB rating
A+
Cities Served
10

An excavating contractor digs, moves and shapes the ground so the rest of a project can happen. We work for homeowners, builders and business owners in Ada and Canyon County, and every service we offer in this category is listed below.

What an Excavating Contractor Does in Boise and the Treasure Valley

Before a plumber can set a sewer line or a concrete crew can pour a footing, somebody has to open the ground. That's our part of the job. We dig to the depth the plans call for, keep the hole or trench safe while it's open, and put the ground back so it doesn't settle later.

A lot of what we do never shows once the project is done. A well-compacted trench just looks like lawn. A good building pad just looks like a garage floor. We work in Boise, Meridian, Nampa, Eagle, Kuna, Star, Parma and Homedale, with our home base in Caldwell.

The Main Kinds of Jobs We Take On

Digging for something that gets built

Footings, crawlspaces, basements, slabs and shop pads. The plans set the size and depth, and in Boise footings have to sit below the 24-inch frost depth. We dig to the builder's marks, and keep the bottom of the hole firm and undisturbed. See foundation excavation.

Putting lines in the ground

Water, sewer, power, gas and irrigation all need a trench. Each one has its own depth, and sewer also needs steady fall from the house to the main. The trench has to be backfilled in layers so it doesn't turn into a sunken stripe across the yard. See trenching services. Homes outside city sewer need a tank and drainfield, covered on our septic system installation page.

Getting water to go somewhere else

Wet crawlspaces and soggy yards usually come down to grade or buried drainage. Before anything gets dug, we look at where the water comes from (roof, sprinklers, a neighbor's lot or groundwater) and where it's allowed to go. The fix might be a regrade, a French drain or a dry well. See drainage solutions.

Taking things out

Old sheds, garages, slabs and driveways. The work usually means breaking concrete, loading out the debris and leaving the ground ready for whatever comes next. If power, gas or water ever ran to the old structure, it needs to be shut off and capped by the right trade before we start. See demolition.

Moving a lot of dirt

Cut and fill, raised pads and berms. When soil from the high side of a lot can fill the low side, less has to be trucked in or out, and that helps the price. When it can't, hauling gets planned into the bid from the start. See earthmoving.

How to Pick an Excavating Contractor

Most people hire an excavator once or twice in their life, so it's hard to know what to look for. These are the checks we'd tell a friend to make, even if they end up hiring someone else.

Look up the Idaho registration

Idaho requires contractors to register with the state, and the registration number should be easy to find on the bid or the website. Ours is RCE-65836. If a contractor can't give you a number, keep looking.

Read reviews for the boring parts

Star ratings don't tell you much. Look for comments about whether the bid was clear, whether the crew showed up when they said, and how they handled a surprise. One of our customers said Tanner gave them three quote options and explained everything in detail. That kind of comment tells you more than "great job."

Get the estimate in writing

A written estimate should say what's included. Does the price cover hauling off the spoil? Backfill and compaction? Putting the lawn or gravel back? What happens if the crew hits rock or caliche? Two bids can look far apart until you line up what each one actually covers.

Ask who calls 811

Idaho law puts the Digline call on whoever is digging, at least two business days before work starts. Your contractor should make that call without being asked. They should also ask you about private lines, like a sprinkler main or power to a shop, since Digline doesn't mark those.

Ask how deep trenches are protected

OSHA requires sloping, benching or shoring once a trench reaches 5 feet deep. Sewer laterals, basements and some water services get there. A contractor should be able to tell you how they'll handle it on your job.

Who Does What on a Dig

Excavation is one piece of a bigger job, and the handoffs are where schedules slip. We open the ground, keep it safe and close it back up. The plumber lays the pipe, the electrician pulls the wire, and the concrete crew sets forms. Inspectors often need to see the work before it's covered. Before the job starts, it helps to agree on who books each trade, who calls for the inspection, and how long the trench or hole can stay open.

Working on Both Sides of the County Line

Boise and Meridian sit in Ada County. Caldwell, Nampa, Middleton and Parma are in Canyon County, and Homedale is in Owyhee County. The digging is the same, but the paperwork isn't. Septic permits go through Central District Health in Ada County and Southwest District Health in Canyon and Owyhee. Water comes from Veolia in most of Boise, while Nampa, Caldwell, Meridian and others run their own systems. HOAs are common in Meridian, Eagle and Star and often want to approve grade changes. We sort out which office or board applies before the job starts.

What Helps Us Price Your Job

You'll get a better number faster if you can send a few things with your request. If you don't have all of them, that's fine. We'll fill in the gaps when we look at the site.

  • Photos of the area, including the gate or path a machine would use
  • Plans or a sketch with rough measurements
  • Anything you know is buried there, like old septic tanks or sprinkler lines
  • Your deadline, like a concrete pour or an inspection date

Why Hire Ultimate Excavation LLC

We're a registered Idaho contractor with a 5.0 rating on Google from 25 reviews. Our reviews call us hard workers who do good work for a fair price, and they mention Tanner by name because he's the one who bids the job and keeps you posted while it's underway. Call (208) 697-2429 or request a free estimate.

Services in this category

Excavator digging with dust rising at golden hour

Augering

Augering in Boise and across the Treasure Valley for posts, footings and pole barns.

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Aerial view of an excavator working in a pool excavation while a crew member checks depth

Basement excavation

Basement excavation for new homes in Boise and the Treasure Valley.

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Excavator working a residential lot with foothills in the background

Commercial excavation

Commercial excavation for contractors and business owners in Boise, Nampa, Meridian and the Treasure Valley.

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Excavator and skid steer moving dirt in a residential backyard

Concrete breaking & hauling

Concrete breaking and hauling in Boise, Nampa, Meridian and the Treasure Valley.

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Close-up of an excavator bucket digging at sunset

Culvert installation

Culvert installation for driveways and farm crossings around Boise and the Treasure Valley.

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Excavator dumping a bucket of dirt beside a framed home at sunrise

Demolition

Small structure demolition in Boise and across the Treasure Valley, from sheds and garages to decks and old foundations.

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Close-up of an excavator bucket digging at sunset

Ditch digging

Ditch digging and ditch cleaning for acreage and rural properties around Boise and the Treasure Valley.

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Aerial view of an excavator digging a pit next to a home under construction

Drainage excavation

Also covers drainage installation

Drainage excavation for homes, acreage and job sites in Boise and the Treasure Valley.

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Aerial view of an excavator and skid steer at a deep excavation pit

Drainage solutions

We track down drainage problems at homes in Boise and the Treasure Valley and fix them at the source.

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Excavator and skid steer moving dirt in a residential backyard

Driveway removal

Concrete, asphalt and gravel driveway removal in Boise and the Treasure Valley, prepped for the new driveway.

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Aerial view of a backyard pool excavation with an excavator and compact track loader

Excavation & grading

Excavation and grading in Boise and the Treasure Valley, dug and shaped by the same crew in one trip.

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Excavator working a residential lot with foothills in the background

Excavation for driveways

Also covers driveway extension

Driveway excavation for new, wider and gravel driveways in Boise and the Treasure Valley.

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Cat mini excavator digging a pool excavation inside wood forms

Excavation services

Excavation services in Boise, Meridian, Nampa, Eagle and the Treasure Valley.

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Top-down view of a pool excavation with an excavator and a compact track loader

Foundation excavation

Foundation excavation for homes, additions and shops in Boise and the Treasure Valley.

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Aerial view of an excavator digging a pit next to a home under construction

Foundations

Foundation groundwork for homes, additions and shops in Boise and the Treasure Valley.

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Excavator digging at a home construction site with the sun behind it

French drain installation

French drain installation for homes in Boise and the Treasure Valley, built for clay and caliche soil.

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Excavator working a residential lot with foothills in the background

Parking lot excavation

Parking lot excavation for shops, churches, offices and small businesses in Boise and the Treasure Valley.

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Excavator and skid steer moving dirt in a residential backyard

Patio extensions

Dirt work for patio extensions in Boise and the Treasure Valley.

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Skid steer and excavator kicking up dust during site preparation

Pipeline trenching

Long trench runs for irrigation, water and conduit across acreage in Boise and the Treasure Valley.

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Excavator at sunset with a dog resting in the dirt nearby

Pond excavation

Pond excavation for farms, livestock and acreage around Boise, Star, Kuna and Canyon County.

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Mini excavator digging inside wood forms in a landscaped backyard

Residential excavation

Residential excavation for homeowners and builders in Boise, Meridian, Eagle, Nampa and the Treasure Valley.

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Excavator and skid steer working a lot in a hillside subdivision

Retaining wall construction

Retaining wall construction for sloped lots around Boise and the Treasure Valley.

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Excavator working a residential lot with foothills in the background

Roadway excavation

Roadway excavation for private roads and long access drives in Boise and the Treasure Valley.

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Aerial view of an excavator and skid steer at a deep excavation pit

Rock excavation

Rock excavation for caliche, basalt and boulders in Boise and the Treasure Valley.

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Excavator digging at a home construction site with the sun behind it

Septic repair

Septic repair excavation for homes in Boise, Kuna, Star, Middleton and Canyon County.

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Aerial view of a mini excavator digging a rectangular foundation

Septic system excavation

Septic system excavation for test holes, tanks and drainfields in Boise and Canyon County.

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Aerial view of a mini excavator digging a rectangular foundation

Septic system installation

Septic system installation for homes in Boise, Kuna, Star, Middleton and Canyon County.

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Close-up of an excavator bucket digging at sunset

Sewer line excavation

Also covers sewer line installation

Sewer line excavation in Boise and across the Treasure Valley.

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Close-up of an excavator bucket digging at sunset

Sewer line trenching

New sewer line trenching for homes, ADUs and shops in Boise and the Treasure Valley.

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Aerial view of a backyard pool excavation with an excavator and a compact track loader

Site excavation

Site excavation in Boise, Eagle, Meridian, Kuna and the Treasure Valley.

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Aerial view of a mini excavator digging a rectangular foundation

Slab excavation

Slab excavation and base prep for homes, garages, shops and ADUs in Boise and the Treasure Valley.

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Mini excavator digging a backyard pool next to Timbercrest Golf Course in Caldwell, Idaho

Swimming pool excavation

Swimming pool excavation in Boise, Meridian, Eagle and the Treasure Valley.

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Aerial view of an excavator and skid steer at a deep excavation pit

Trenching

Quick, tidy trenching around homes and acreage in Boise and the Treasure Valley.

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Aerial view of an excavator and skid steer at a deep excavation pit

Trenching services

Trenching services in Boise, Meridian, Nampa and the rest of the Treasure Valley.

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Top-down view of an excavator and skid steer digging

Trenchless excavation

Trenchless excavation for lines under driveways, sidewalks and roads in Boise and the Treasure Valley.

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Excavator digging at a home construction site with the sun behind it

Underground utilities

Underground utility trenching in Boise and the Treasure Valley, planned so you know where every line runs.

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Aerial view of an excavator beside a freshly dug foundation hole

Utility excavation

Also covers utility trenching

Utility excavation in Boise and the Treasure Valley for power, water, sewer and more.

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Excavator digging at a home construction site with the sun behind it

Water line excavation

Water line excavation in Boise and the Treasure Valley. Got a leak or a burst line?

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Excavator digging with dust rising at golden hour

Water tank excavation

Excavation for underground water tanks, cisterns, fire water storage and tank pads in Boise and the Treasure Valley.

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What Our Customers Say

Rated 5.0 out of 5 from 25 Google reviews.

6 five-star reviews

  • We've worked with these guys on several pool forming and excavation projects. They're on time, work hard, and do great work. Would recommend to other builders!

    Cassi G.

  • Our main water line burst and I had no idea who to call to fix this problem. Thankfully Tanner at Ultimate Excavation came to save the day!! He gave me three different quote options and explained everything in detail. Very knowledgeable and professional. They were able to start the project immediately! 10/10 recommend.

    Sajra I.

  • Tanner and his crew do a fantastic job digging pools for us. Always flexible with schedule, professional, and great communication. He also dug and installed a septic system for me and did a great job and at a great price! Our entire team highly recommends using ultimate excavation, you won’t be disappointed!

    Stanley M.

  • Tanner and his crew put in a stone block retaining wall and drainage around our home. They were timely, professional, and paid attention to all the small details. We are very happy with the work and will use them again!

    Steve G.

  • Tanner and his whole crew was so great to deal with! Tanner has great communication, got us a bid quickly and was able to get to our job well before the rains came which we really appreciated!

    Kendra Z.

  • Such a great company to work with. The owners are solid people, the quality of work is top-notch, and they genuinely care about their customers and the end result. They get the job done right.

    Sara V.

Frequently Asked Questions

What does an excavating contractor do?

An excavating contractor digs and moves earth for construction and repairs. That includes foundations, utility trenches, septic systems, drainage, demolition, grading and hauling dirt. Plumbers, electricians and concrete crews usually come in after we've opened the ground.

Do excavating contractors need a license in Idaho?

Idaho requires contractors to register with the state. Our registration number is RCE-65836. Some related trades, like plumbing and electrical, have their own licenses, and those trades handle the pipe and wire that goes in our trenches.

Who is supposed to call 811 before digging?

In Idaho, the person or company doing the digging makes the Digline request at least two business days ahead. When you hire us, we make that call.

How do I compare bids from different excavators?

Line them up item by item. Check whether each one includes hauling, backfill, compaction, restoration and a plan for rock. The lowest number sometimes leaves those out.

Should I hire the excavator myself or let my builder do it?

On a new home or a big remodel, the builder usually hires the excavator and keeps the trades in order. On a stand-alone job like a water line, a shop pad or a drainage fix, hiring the excavator yourself is common. Either way, make sure everyone knows who is in charge of scheduling and inspections.

What should a bid say about rock and caliche?

It should say how rock, caliche or buried debris is handled if the crew hits it. Some bids include an allowance, and some price it separately as extra time. Ask before you sign so a surprise underground doesn't turn into a surprise on the bill.

Get in touch with Ultimate Excavation LLC