Permits and Code for Foundation Excavation (Oregon)

Quick Verdict

A foundation excavation permit in Oregon is usually folded into the building permit that covers your foundation, but it is not the only approval in play. A separate grading or excavation permit can kick in on bigger cut-and-fill or on sensitive sites, an 811 utility locate is required before any digging, your contractor must be CCB-licensed, and DEQ erosion-control rules apply on larger or near-water sites. Rules vary by county and city, so the safe move is to confirm with your local jurisdiction. This article maps the approvals statewide so you know what to ask about before the excavator shows up.

Why the Permit Picture Confuses People

Owners often ask "do I need a separate permit just to dig the foundation?" and the answer is usually no, because the footing excavation rides along with the building permit. But that simple answer hides several other approvals that may apply depending on the site. Missing one stalls the job. The full dig sequence is in our foundation excavation guide for Oregon; this page focuses on the approvals.

The Building Permit Covers the Foundation

For a new structure or an addition, the building permit issued by your local building department covers the foundation, including the footing excavation, the footings, and the inspections that go with them. You generally do not pull a standalone "foundation dig" permit. The excavation is part of the permitted construction.

That permit comes with inspections, and one of the most important is the footing inspection before concrete is placed, covered in footing inspection before the pour.

When a Separate Grading or Excavation Permit Applies

A distinct grading or excavation permit can be required when earthwork goes beyond the footing trench:

• Moving large volumes of cut-and-fill beyond the building footprint.
• Significant site reshaping, retaining walls, or steep slopes.
• Work on sensitive lands, near waterways, or in floodplains.

Thresholds vary by jurisdiction, so this is exactly the kind of thing to confirm with your county or city.

The 811 Locate Is Mandatory

Before any digging in Oregon, you must call 811 (or submit a locate request) so underground utilities are marked. This is required by law, not a formality.

1. Submit the locate request before you dig.
2. Wait the required notice period for utilities to mark.
3. Respect the tolerance zone and hand-expose near marks.

This applies to a foundation dig just as much as a utility trench.

CCB Licensing and DEQ Rules

Two more pieces complete the picture:

• CCB-licensed contractor. Oregon requires construction contractors to hold a Construction Contractors Board license. Your excavator and builder should be licensed.
• DEQ and erosion control. On larger sites, an erosion and sediment control plan and DEQ permit coverage can apply, especially when an acre or more is disturbed or work is near water. Even smaller sites carry local erosion-control expectations during the wet season.

County vs. City and Sensitive Lands

Whether your project answers to a county building department or a city one depends on where the property sits, and the two can have different processes and thresholds. Sensitive-lands overlays, setbacks from streams or steep slopes, and floodplain rules add their own review. When the dig is close to a property line, working next to a neighbor's existing foundation has its own cautions, covered in excavating next to a neighbor's foundation. Always verify the specific requirements with the jurisdiction that has authority over your parcel.

How the Approvals Stack Up in Time

The approvals do not all happen at once, and the order is what protects your schedule. A typical foundation job moves through them like this:

1. Building permit applied for and issued. This is the long lead item. Plan review can take weeks, and it covers your footing excavation, so the dig cannot legally start until it is in hand.
2. 811 locate submitted. Once you are close to digging, you call 811 and wait the required notice period for utilities to mark. This is fast compared to plan review but it still cannot be skipped.
3. Excavation begins. The crew digs the footing trench to the depth and width on the approved plans, hand-exposing inside the utility tolerance zone.
4. Footing inspection before the pour. An inspector confirms the trench, depth, and any reinforcement before concrete goes in. No pour happens until this passes.
5. Erosion controls maintained throughout. On sites that trigger a plan, silt fence and inlet protection stay up and get checked during the wet season.

The point of mapping it out is that a missed 811 call or a building permit still in review can stall an excavator that is already mobilized, and a mobilized crew that cannot dig is wasted money.

Where Owners Get Tripped Up

A few patterns cause most of the permit headaches on Oregon foundation digs:

• Assuming "no separate dig permit" means "no approvals." The building permit covers the footing, but the 811 locate, the CCB-licensed contractor, and any erosion or grading coverage still apply.
• Forgetting the dig is part of an inspected sequence. The footing inspection before the pour is a hard gate. Pouring early and getting caught means jackhammering it back out.
• Treating county and city as interchangeable. A parcel just outside city limits answers to the county, with its own thresholds and forms. Confirm who has authority over your exact address.
• Underestimating sensitive-lands overlays. Stream setbacks, steep-slope rules, wetlands, and floodplain reviews can add steps and time even on a modest house, especially on rural and hillside lots.
• Hiring an unlicensed digger to save money. Oregon expects a CCB-licensed contractor on this work, and an unlicensed dig can void inspections and create liability if a utility is struck.

The fix for all of these is the same and it is boring on purpose: ask the jurisdiction what applies to your parcel before the excavator is booked, not after it is parked on the street.

The Bottom Line

For most foundation digs, the building permit covers the excavation, but you still need an 811 locate, a CCB-licensed contractor, possible grading-permit and DEQ coverage, and confirmation from your local jurisdiction. Sorting this out early keeps permit and inspection timing from blowing up your schedule. To get a contractor who handles the locates and inspections cleanly, request a free estimate and explore our excavation services.