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By CR Score, the highest-ranked plumber in Delafield, WI is Kettle Moraine Heating & Air Conditioning, LLC with a CR Score of 61/100. It has 4.9★ from 4,102 Google reviews. It is open 24/7. West Allis Heating, Cooling, Plumbing, and Electrical (#2) and Preferred Plumbing (#3) follow. We ranked 217 plumbers on ten factors, last updated October 23, 2026.
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ContractorsRanked ranks 217 plumbers serving Delafield, WI. 2 of them are based in Delafield; the rest serve it from nearby towns. Another 20 within 25 mi are listed but not ranked yet. Counts are as of October 2026.
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59 ranked plumbers in Delafield post 24/7 hours. The highest-ranked are Kettle Moraine Heating & Air Conditioning, LLC (#1), West Allis Heating, Cooling, Plumbing, and Electrical (#2) and Preferred Plumbing (#3). Hours come from each business's Google listing as of October 2026, so call to confirm.
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89 of 217 ranked plumbers post Saturday hours and 64 post Sunday hours. The highest-ranked open Saturdays are Kettle Moraine Heating & Air Conditioning, LLC (#1), West Allis Heating, Cooling, Plumbing, and Electrical (#2) and Preferred Plumbing (#3). Posted hours are office hours; crews may book weekend jobs separately.
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In Wisconsin, Wisconsin Department of Safety and Professional Services handles licensing and covers Plumbing work: water supply, drain, waste and vent piping and fixtures. Search the business or license number at https://online.drl.wi.gov/LicenseLookup/OrgCredentialSearchResults.aspx.
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Water heater replacement typically costs $882 to $1,826, with $1,348 typical (Per unit, installed (unit plus labor); typical range of customer-reported jobs. US national range). This is a national range, not adjusted for Delafield. Prices were last checked October 2026. Get at least two written quotes before you hire.
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The median Google rating among 217 rated plumbers in Delafield is 4.8★, with a median of 34 reviews. Mr. Holland's Home Services has the most, 7,086 reviews, and ranks #35. We adjust ratings for review count, so a few five-star reviews cannot top the list.
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Each plumber gets a 0–100 CR Score from ten published factors, led by reputation (25%), credentials (15%), review volume (10%) and trade focus (10%). A business with no Google reviews scores zero on rating, review volume and recency; other factors we cannot measure are left out. Only businesses with a confirmed trade and 3 or more reviews, or a claimed profile, are ranked.