O'Neill Plumbing

O'Neill Plumbing is a Plumber in Seattle, WA. The company serves residential and commercial customers in West Seattle and the greater Seattle area, including parts of King, Pierce, and Snohomish counties. It offers plumbing repair, new installations, sewer line service, and emergency calls. The business holds a rating of 4.80 based on customer reviews.

Founded in 1917 by James O'Neill, the company has operated for over a century through four generations of ownership. Tom O'Neill took over in 1934, followed by his son Terry in 1961. Terry's son Tim O'Neill joined in 1984 and grew the underground utility division, holding a city license as a registered side sewer contractor. Tim and his wife Stephanie purchased the business in 2013, and in November 2025, they sold it to long-time employee Tyler Blanchard and his wife Katie, who continue to operate it as a family-owned business. The company now employs 25 people, including a dedicated underground utilities division with over 12 pipe fitters and operators who use excavating equipment and dump trucks.

The business operates three divisions: service, contracting, and underground utilities. The service team handles faucet repair, garbage disposal repair and installation, toilet repair and replacement, water heater services, low water pressure diagnostics, and home repiping. They also provide trenchless sewer repair using point repair methods to fix localized damage without full excavation. The underground utilities division specializes in installing and repairing underground water lines, sewer lines, and utility connections. Services include hydro jetting to clear stubborn clogs and burst pipe repair. The company also offers specialized side sewer work, providing explicit instructions for customer-led excavation and completing only the specialized pipe prep.

Customers praise the professional, courteous, and prompt service of technicians like Ken, Shaun, Steve, and John. Reviews highlight the team's ability to explain issues clearly, protect property, and clean up after work. The staff is noted for offering honest recommendations, including cost-effective options, and for handling complex situations with supervisors checking on jobs. The business maintains a strong reputation for reliability, with teams responding quickly to emergencies and diagnosing difficult situations accurately.

With more than a century of history in West Seattle, O'Neill Plumbing combines deep local experience with modern plumbing solutions, serving as a trusted resource for the community's residential and commercial needs.

O'Neill Plumbing is located near California Avenue Southwest, about 0.1 miles from Morgan Junction Park and Fauntleroy Way Southwest.

BizScoreAI gives the business a Performance score of 98 out of 100, which reflects fast website loading that keeps visitors on the page and aids search engine ranking. The company holds a Content Quality score of 75 out of 100.

Services:

• Burst pipe repair
• Hydro jetting
• Trenchless sewer repair
• Underground utilities & construction
• Water heater repair and replacement