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Best plumbers in Oconomowoc, WI

The highest-scoring plumber in and near Oconomowoc is Cardinal Heating, Cooling, Plumbing & Electric (score 80, 5.0 stars from 353 Google reviews). 6 companies meet the 5 Star standard within 25 km.

Last updated Sep 25, 2026How we rank
  1. 1

    Cardinal Heating, Cooling, Plumbing & Electric

    5.0 · 353 Google reviewsSussex, WI
    80SCORE
    (262) 316-3780 WebsiteFull profile
  2. 2

    Seider Heating, Plumbing & Electrical

    4.8 · 386 Google reviewsWaukesha, WI
    71SCORE
    (262) 436-0505 WebsiteFull profile
  3. 3

    Preferred Plumbing

    4.9 · 186 Google reviews
    71SCORE
    (262) 470-4269 WebsiteFull profile
  4. 4

    Jon Debelak Plumbing & Heating Inc

    4.8 · 210 Google reviewsSussex, WI
    67SCORE
    (262) 375-4460 WebsiteFull profile
  5. 5

    P.J.'s Plumbing Co., Inc.

    4.6 · 251 Google reviewsSussex, WI
    63SCORE
    (262) 367-2357 WebsiteFull profile
  6. 6

    Horner Plumbing

    4.6 · 86 Google reviewsPewaukee, WI
    60SCORE
    (262) 695-7120 WebsiteFull profile

We list only companies that clear our published bar, so this area is still filling in. As more plumbers near Oconomowoc qualify, they'll appear here automatically.

Compare the top 6

Top plumbers in Oconomowoc by 5 Star Score
#CompanyScoreGoogle ratingReviewsYearsBased in
1Cardinal Heating, Cooling, Plumbing & Electric805.0353–Sussex
2Seider Heating, Plumbing & Electrical714.8386–Waukesha
3Preferred Plumbing714.9186–
4Jon Debelak Plumbing & Heating Inc674.8210–Sussex
5P.J.'s Plumbing Co., Inc.634.6251–Sussex
6Horner Plumbing604.686–Pewaukee

Plumbers in Oconomowoc: quick answers

Who is the highest-rated plumber in Oconomowoc, WI?

Cardinal Heating, Cooling, Plumbing & Electric has the highest 5 Star Score among plumbers in and near Oconomowoc: 80 out of 100, with a 5.0 star Google rating from 353 reviews.

How many 5 Star plumbers serve Oconomowoc?

6 plumbers meet our standard within 25 km of Oconomowoc: at least a 4.5 star rating, 20 or more reviews and a score of 60 or higher. The top 6 have 1,472 Google reviews between them, averaging 4.78 stars.

How are these plumbers ranked?

By 5 Star Score: rating quality adjusted for review count (45 points), review volume (25), review recency (15), years in business (10) and license verification (5). Businesses cannot pay to change their score.

Plumbers near Oconomowoc

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Ratings and review counts come from each company's public Google listing and are re-checked monthly. 5 Star Home Service Pros is independent; companies cannot pay for placement.