#1 · SEATTLE
Directional drilling bores utility lines — water, sewer, conduit — under driveways, roads, and landscaping without trenching. It's the method behind most trenchless installs and the answer when a line must cross something expensive.
Wet-side market range — get itemized quotes before work starts
Companies whose focus matches this work are listed first, then Seattle's other top-rated plumbers. Same no-pay-to-play ranking as everywhere on Wetside Plumbing — the formula.
Google Business data, 2026-08-07. See the full Seattle ranking →
Also searched as: airport directional drilling, excavating, excavating service, excavation, plumbing tunneling.
Whenever surface restoration would cost more than the drilling premium — concrete, asphalt, established landscaping. On a plain lawn run, trenching is often cheaper.
Call-before-you-dig locates are legally required and any legitimate contractor arranges them. Private-side locating (lines the public service doesn't mark) is worth paying for on older properties.
Ask for their Washington L&I contractor number and verify it at secure.lni.wa.gov/verify — active license, bond, and insurance. Listings above with a green badge are ones we've already matched to an active license in state records.