Basement Excavation in Pend Oreille County

A basement excavation is the deepest dig on most house projects, so the points to settle early are depth, where the soil goes, how the walls of the hole are kept safe, and who calls 811. Washington's four-foot rule for excavations applies to nearly every basement dig.

Email us about your project: contact@newportexcavation.com

What a basement excavation involves

A basement starts as a large, deep hole shaped to the building plans. The hole is wider than the foundation so that crews have room to build the walls, wrap them and backfill later, and the soil that comes out is a large volume that has to be stacked, spread or hauled away. On a rural lot that volume often decides how the job is set up.

Because the hole is deep, the ground around it matters. Loose or wet soil can slough, a high water table can fill the hole, and rock can slow the dig. A basement dig also sits between other jobs: land clearing and the building pad come first, and footings, walls, drainage and backfill come after. Knowing where your job sits in that order helps you ask the right questions.

Whoever digs is responsible for keeping the excavation safe for people working in or near it. Washington sets a clear rule for that, described below, and it is a fair question to ask any company how it plans to meet it on your lot.

When people look into this

The plans call for a full or daylight basement.
A building site is ready and the foundation depth has been set.
A sloped lot needs a walkout basement cut into the hillside.
A pad is finished and the hole is the next step.
A previous crawlspace plan has changed to a basement.
Soil from the dig needs a plan before work begins.

What the work usually looks like

Confirm the plans. Depth, width and the setback of the hole from the foundation come from the plans.
Locate utilities. 811 notice comes first (details below).
Strip the topsoil. Topsoil is removed and kept apart from the soil below it.
Dig in stages. The hole is taken down toward depth, with the sides sloped or supported as the safety rule requires.
Check depth and level. The bottom is checked against the plans before footings are set.
Plan the spoil. Dirt is stacked at a safe distance from the edge, spread or hauled away.

How to prepare

Before work starts, it helps to settle these points:

Have the building plans and the intended foundation depth in hand.
Mark the footprint and the area around it where machines and spoil will sit.
Decide what happens to the soil: kept on the lot, spread or hauled away.
Find out who will call 811 and get the ticket number.
Ask how the sides of the hole will be sloped or supported and who is responsible for that.
Tell whoever prices the job about any water you have seen on the lot.
Ask Pend Oreille County whether a permit applies before work starts.
Get the price and what it includes in writing.

What affects the cost

Excavation is commonly priced by the hour for operator and machine, or as a set price for a defined scope. For a basement, depth and soil volume drive the price more than anything else.

Depth and footprint. Every extra foot of depth adds a large volume of soil.
Soil type. Rock, cobbles, clay or loose soil change how rapidly the dig goes.
Water. Wet ground or a high water table can add pumping or a pause.
Hauling. Soil hauled away adds machine time and distance, while soil kept on the lot does not.
Sloping or shoring. Safe sides take room, time or equipment.
Access. A narrow or steep route to the hole slows machines.
Winter. Frozen ground can slow digging and change a start date.

Why the soil plan matters on a rural lot

A basement produces more soil than most other residential jobs, and on a rural lot there is no curbside option. The dirt can be used to shape the pad, to build up low spots, to berm or grade around the building, or it can be hauled away. Each choice has a cost and a timing effect, and a plan made after the hole is open usually costs more. Topsoil is worth treating separately, because it is the layer that supports lawn and garden later and is easy to bury by accident.

It also helps to think about where machines and spoil will stand during the dig. A pile placed too close to the edge is both a cave-in risk and a rule problem, because Washington's safety guidance keeps spoil at least two feet back. On a tight lot that may push piles farther than expected, which is another reason to agree on the soil plan before anyone starts digging.

Local rules and sources

Excavation safety. Washington's Department of Labor & Industries requires a protective system for every excavation four feet deep or deeper, unless it is made entirely in stable rock, and for shallower excavations when a competent person sees a potential cave-in (WAC 296-155-657). L&I's trenching safety publication adds that digging spoil must stay at least two feet from the edge of the excavation and that workers in a trench four feet or deeper need a way in and out at least every 25 feet.

Utility locates. In Washington, notice must go to the one-number locator service (dial 811) at least two full business days, and no more than ten full business days, before digging starts (RCW 19.122.030). Whoever is digging is responsible for making sure the notice is made, even if someone else makes the call for them.

Permits. For land in Pend Oreille County outside city limits, Pend Oreille County's Community Development Department handles building permitting. Inside a city such as Newport, ask the city.

Registration. Washington contractors are checked on the state Department of Labor & Industries “Verify a Contractor, Tradesperson or Business” page.

Large sites. If clearing and digging for the whole project reaches one acre, the stormwater permit described on the erosion control page may apply.

Reasons to trust this page

Most rules on this page name their public source, such as a Washington statute or a county office.
Cost factors are explained in plain terms, and this site does not quote prices.
The email address is shown at the top of every page, and the Privacy page says what a quote request collects.

Common questions

How deep can a basement excavation go without extra safety steps?

Washington requires a protective system for every excavation four feet deep or deeper unless it is made entirely in stable rock (WAC 296-155-657). A basement is far deeper than four feet, so ask any company how it will slope or support the sides and who is responsible. Also ask who calls 811 before digging starts.

Who is responsible for calling 811 before a basement dig?

Whoever is digging is responsible for making sure notice goes to 811, even if someone else makes the call for them. In Washington the notice must go in at least two full business days, and no more than ten, before digging starts. Settle who will call, and get the ticket number, before work is booked.

What happens to all the soil from a basement?

It can stay on the lot, be spread, or be hauled away, and each choice changes the cost. Hauling adds machine time and distance, and a price that leaves it out is not comparable to one that includes it. Settle the plan in writing, and keep topsoil apart if you want it back.

Does a basement dig need a county permit?

Possibly. A building permit for the house usually covers the foundation, and Pend Oreille County's Community Development Department handles building permitting outside city limits. Inside a city such as Newport, ask the city. Ask the county before work starts, and settle who will handle any permit the work requires.

How is a basement excavation priced?

Excavation is commonly priced by the hour for operator and machine, or as a set price for a defined scope. For a basement, depth, soil type, water and hauling change the total most. Ask for the basis and what is included in writing, so prices from different companies cover the same work.

Related services and areas

Request a quote

Tell us about your project and how to reach you.