Company Facts
O'Neill Plumbing at a Glance
The work
- Best for
- side sewer and water service work on older West Seattle homes
- Primary service
- Plumbing
Where
- Headquarters
- Seattle, WA
- Service area
- Seattle
- Emergency service
- Business hours only
Money and guarantees
- Free estimates
- Not advertised
- Financing
- Not advertised
Editorial Review
Our Take on O'Neill Plumbing
The combination of a century-old West Seattle address, a 4.8 rating from 395 Google reviews and a service list heavy on sewer locating, lining and trenchless replacement points at a firm built around underground work rather than fixture swaps. That is the harder and more consequential end of the trade, and the one where local knowledge of clay tile and permit requirements pays off. Clarify after-hours call-out billing and whether permits and restoration are inside the quote before signing.
Best for: side sewer and water service work on older West Seattle homes
What We Like
- 4.8 from 395 reviews on its Google Business Profile, read September 27, 2026
- Full underground capability: locating, hydro jetting, lining and trenchless sewer replacement
- Family-owned and operating in West Seattle since 1917 by its own account
- Published hours show 24 hour availability every day
- Covers both small indoor repairs and whole-house repiping
- Separate Eastside phone line alongside the Seattle number
Things to Consider
- Pricing is not published; one testimonial describes bids landing mid-range on a repipe
- After-hours response terms and any minimum charge need confirming by phone
- Service area beyond Seattle and the Eastside is not clearly defined
Google Reviews for O'Neill Plumbing
Customer ratings shown here come from Google. They are separate from our editorial review above.
Google rating
4.8
Based on 395 Google reviews
Review data updated September 27, 2026
Rating Distribution
- 5 stars92%
- 4 stars1%
- 3 stars1%
- 2 stars0%
- 1 star5%
iAbout this distribution
The distribution reflects the 395 Google reviews available when this profile's review data was last refreshed on September 27, 2026. Ratings and counts change continuously on Google, so figures here may lag the live profile slightly. We publish only the values returned by the source, never estimates for missing bands.
Editorial Ranking
Why O'Neill Plumbing Made Our Top 10
It holds position 10 in 10 Best Plumbers in Seattle, WA.
Services Offered
Areas Served
Based in Seattle, WA.
iAbout service coverage
Coverage is as the business describes it, cross-checked against where its recent documented work is. A company will often travel beyond the areas listed here for a large job and decline a small one at the same distance, so confirm your address before scheduling.
About O'Neill Plumbing
Founded in 1917 by James O'Neill according to the company's own history, this is one of the longer-running trade names in West Seattle, and the address on California Avenue SW puts it in the middle of the neighbourhoods it works in most. Longevity is not the same as quality, but in the sewer business it does mean something: a firm that has been opening the same streets for decades tends to know where the clay tile runs, which blocks have shared side sewers, and which alley access saves a day of digging.
The work splits roughly into two halves. Inside the house you get water heater repair and replacement, faucet and toilet work, garbage disposal swaps, dishwasher installation, burst pipe repair and whole-house repiping. Outside, the list moves to sewer line cleaning and location, hydro jetting, sewer pipe repair and lining, trenchless sewer repair and replacement, and water line repair or replacement. Both residential and commercial customers are served, and the company describes underground utility work as part of its core rather than a sideline.
Seattle's housing stock is what makes that second half so busy. Much of West Seattle, Fauntleroy, Alki and the Junction went up when concrete and clay tile were standard for side sewers, and mature street trees have spent the following decades pushing roots into every joint. A recurring backup in an older Seattle house is usually roots or a bellied section, not grease, and the honest answer involves a camera inspection and a locate before anyone quotes a repair. That sequence, clean, camera, locate, then decide between spot repair, lining or a full trenchless pull, is exactly the sequence oneill plumbing's published service list follows. Trenchless matters here because so many West Seattle homes sit behind mature landscaping, stamped driveways or a steep front slope where open-cut excavation gets expensive fast.
There is also the city's permitting layer to think about. Side sewer work in Seattle generally requires a side sewer permit, and street or right-of-way work brings its own approvals and restoration requirements. Ask who pulls the permit, who is responsible for restoring pavement and landscaping, and whether the estimate includes those costs or treats them as extras. Ask the same about water service replacement, where the line between utility responsibility and homeowner responsibility at the meter surprises a lot of people.
On day-to-day handling, the published hours show around the clock availability every day of the week, which suits burst pipes and hard blockages. Confirm what after-hours actually means in practice before you rely on it: whether a technician is dispatched at 2am or a call is logged for the morning, what the call-out charge is, and whether there is a minimum labour block. One of the reviews quoted on the company site mentions a one-hour minimum charge on a weekend drain call, so it is worth asking how that is billed now. Appointments can be requested online, and a separate Eastside phone number is listed, suggesting coverage beyond the West Seattle core.
The Google Business Profile rating of 4.8 from 395 reviews, read on September 27, 2026, is the strongest public signal available. A review count that size, built up over years rather than a season, tends to reflect steady repeat residential work more than one-off marketing pushes. Reviewers on the company's own site repeatedly mention cleanup, protecting flooring, and explaining options before the work starts, though those are testimonials the company chose to publish.
Who is it not for. If you want the cheapest possible quote on a repipe, this may not be it; one published testimonial describes the bid landing mid-pack among several. Anyone outside the Seattle and Eastside service area should call first rather than assume. And if your job is a straightforward fixture swap, a smaller one-van operator may get to you sooner and cost less. For sewer and water service work in older West Seattle housing, though, oneill plumbing sits in the group worth getting a number from, alongside the larger regional franchises and a handful of independent side sewer specialists. Get at least two camera inspections and compare what each one recommends.
iWhere this information comes from
Company history, ownership and capability details on this page are provided by the business and reviewed by our editors for plausibility and consistency. They are not the same as the credentials block, where each item carries its own verification status and source.
Reputation by Source
We show each source separately rather than blending them into a single score, because they measure different things.
Google
4.8/ 5
395 customer reviews
TenBestFind
Editorially reviewed
Ranked #10 in Seattle plumbers, September 2026
Project Photos
Business-submitted, reviewed by our editors
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O'Neill Plumbing FAQs
Does O'Neill Plumbing really answer calls 24 hours a day?
Its published hours list 24 hours, seven days a week, and the company advertises emergency service. What that looks like at 3am is worth confirming when you call, including whether a technician is dispatched immediately and what the after-hours rate or minimum charge is. The Seattle number listed is (206) 932-5283, with a separate Eastside line published on the website.
How is oneill plumbing rated?
Its Google Business Profile shows 4.8 out of 5 from 395 reviews, read on September 27, 2026. That is a large review count for a single-location plumber and suggests years of accumulated residential work rather than a recent push. The company also publishes customer testimonials on its own site, which are selected by the company.
Do they do trenchless sewer replacement?
Yes, trenchless sewer repair and replacement is listed among its services, along with sewer pipe lining. Trenchless methods matter on West Seattle lots where open-cut excavation would mean cutting a driveway, removing mature landscaping or working on a steep slope. Whether trenchless suits your line depends on what the camera inspection finds, so expect a locate and inspection first.
Who handles the permit for side sewer work?
Ask directly, because side sewer work in Seattle generally requires a permit and right-of-way work brings further approvals. A licensed plumbing contractor normally pulls it, but you want it stated in writing along with who pays for pavement and landscape restoration. Get that clarified before the quote is signed rather than after the dig starts.
Is this company only for West Seattle?
West Seattle is its home base, with the shop on California Avenue SW, but the website describes service across the greater Seattle area and lists a separate Eastside phone number. If you are further out, call to confirm coverage and any travel charge before booking.
Can they repipe an older house?
Repiping is on the service list, and it is common work in Seattle houses with original galvanised supply lines showing rust-coloured water or falling pressure. Expect a walkthrough covering access routes, how many walls need opening, who patches drywall afterwards, and how the house will be supplied with water during the changeover. Getting two or three repipe bids is standard practice.
Is O'Neill Plumbing licensed and insured?
We have no credential records on file for this company yet. Ask for the certificate directly from the insurer before booking work.
What areas does O'Neill Plumbing serve?
Seattle. Coverage is as the business describes it, cross-checked against where its recent documented work is. Confirm your address before scheduling, particularly at the edge of a service area.
Does O'Neill Plumbing offer emergency service?
Emergency availability is not listed for this company. If you need an urgent call-out, check the ranking for companies that do list it.
What warranty do they offer?
Warranty terms are not on file. Ask for them in writing before work starts.
How was this profile built?
Credentials come from issuing authorities, ratings from the company's Google Business Profile with the date we read them, and the editorial take from our own review of estimates, warranty documents and public feedback. Anything the business told us is labelled as reported.
Can a business pay to improve its profile?
A business can subscribe to manage its own listing details, and it can buy a labelled sponsored placement. Neither changes a ranking position or the editorial assessment on this page.
Is Something Incorrect?
Business information changes. Tell us about an address, phone, website, service area, credential or ownership change, or let us know if this company has closed.
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Claiming lets you correct and maintain the factual information on this profile. Claiming or upgrading a profile does not guarantee inclusion in a TenBestFind ranking and never affects ranking position, which is decided editorially.
About This Business Profile
- Last reviewed
- September 2026
- Profile last updated
- September 27, 2026
- Google review data updated
- September 27, 2026
- Reviewed by
- Dana Whitfield, Senior editor, home services
- Sources checked
- Google Business Profile, Company website
- Sponsorship status
- No commercial relationship
Dana runs the editorial side of TenBestFind. She built the research process, decides which markets get covered next, and writes the plumbing and chimney rankings herself. Before this she spent eleven years as a consumer reporter covering contractor licensing and home improvement fraud.