Plumbers and heating and cooling contractors in Washington
3,543 plumbers and heating and cooling contractors are listed in Washington. 321 hold an active USDOT registration. The 27 counties listed below have at least 15 each and account for 3,475 of them.
Washington licenses plumbing contractors and certifies plumbers through its Department of Labor and Industries.1, 2 Heating and cooling contractors in Washington register as specialty contractors rather than holding a competency license.1, 2 Your local building department in Washington can tell you whether replacing a water heater, furnace or AC needs a permit.
Counties
Other counties in Washington
68 contractors in 10 counties with fewer than 15 listings.
Adams County 1 contractor
Asotin County 9 contractors
All Phase Plumbing Jr, Black Dog Plumbing LLC, Crestline Core Air Conditioning, Harper Plumbing, Hells Canyon Heating & Air LLC, I T C Systems, Lazer Heating & AC Inc, Renaissance Construction, Rooster's Heating & Coolng LLC
Columbia County 3 contractors
Ferry County 3 contractors
Jefferson County 13 contractors
Admiralty Heating & Air, Aloha Plumbing Inc, Bayview Pumps Inc, Ben's Heating Service Inc, Bob Brown Plumbing Inc, Crescent Plumbing, Frederickson Electric Inc, Jet Plumbing & Heating LLC, Kirk's Quality Plumbing, Olympic Hvac LLC, Pipe Masters, Plumbing Repair Services Inc, The Spartan Plumber
Klickitat County 11 contractors
Baxter Plumbing LLC, Brasuell Plumbing, Cascade Plumbing & HTG Inc, Firwood Agricultural Services, G & L Construction, Just Cuz Plumbing LLP, Pronto Plumbing Service, Proper Plumbing Solutions LLC, Randy's Plumbing, LLC, Sandford Plumbing & Const LLC, Schroder's Well Drilling LLC
Lincoln County 4 contractors
Kysar Mechanical Inc, Lindberg Contracting LLC, Pull Away Transport, Swegle Pumps LLC
Pacific County 10 contractors
A R Heating & Cooling Inc, Ark Plumbing Services Inc, Belks Plumbing & Contrctng LLC, Bud's Lumber Supply, Inc., Evers Electric LLC, Frontline Mechanical Services LLC, Normand Mechanical, Taft Plumbing and Septic Inc, Taft Plumbing Inc, Valley Plumbing LLC
Pend Oreille County 3 contractors
American Eagle Hvac LLC, Driller Man, the, Stateline Plumbing
Whitman County 11 contractors
Ackerman Heating & Air Conditioning, Artizan Electric LLC, Brandon Schneider Plumbing LLC, Hilliards Htng & Plbg Inc, Jason Ray's Plumbing LLC, Ken Paulson Plumbing LLC, Pullman Heating & Electric, Shrode Heating & Cooling Inc, Startin's Repair Inc, TNA Electric & Controls Inc, Yellow Duck Refrigeration LLC
Plumbing and HVAC rules in Washington
- Heating and cooling license
- State codes
Washington's State Plumbing Code is the 2021 Uniform Plumbing Code with amendments.3 Washington's State Mechanical Code is the 2021 International Mechanical Code with amendments.4
- Replacement permits
Ask your local building department whether replacing a water heater, furnace or AC needs a permit where you live.
- Backflow testing
Washington requires backflow assemblies to be tested when they're installed and every year after by a certified backflow assembly tester.5
What plumbing and HVAC work costs in Washington
These are published national ranges, not quotes. Local quotes vary.
- A plumber's hourly rate
- $45 to $200 an hour; most charge $70 to $150 (HomeAdvisor, Fixr, HomeGuide)
- A plumber's service call
- $50 to $300 a visit, which often covers the first hour (HomeAdvisor, Fixr, HomeGuide)
- After-hours or emergency call
- about $100 to $300 added to the call, or about $150 to $350 an hour (HomeAdvisor, Fixr, HomeGuide)
- Burst or leaking pipe repair
- $200 to $3,000; the guides' averages run $500 to $1,200 (HomeAdvisor, Fixr, HomeGuide)
- Clearing a sink, tub or toilet drain
- $100 to $275 (HomeAdvisor, Fixr, HomeGuide)
- Clearing the main line
- $175 to $800; typically $350 to $650 (HomeAdvisor, Fixr, HomeGuide)
- Hydro jetting
- $350 to $1,400, depending on the line and the blockage (HomeAdvisor, Fixr, HomeGuide)
- Gas tank water heater
- $700 to $2,700 installed; about $1,900 on average (HomeAdvisor, Fixr, HomeGuide)
- Tankless water heater
- $1,600 to $5,600 installed for gas, depending on gas line and venting work (HomeAdvisor, Fixr, HomeGuide)$850 to $3,000 installed for electric, before any panel upgrade ($850 to $1,700) (Fixr, HomeGuide)
- Heat pump water heater
- $2,000 to $4,600 installed in place of an electric tank; more when it replaces gas (HomeAdvisor, Fixr, HomeGuide)
- Sewer camera inspection
- $125 to $500 (HomeAdvisor, Fixr, HomeGuide)
- Sewer line replacement
- about $1,400 to $5,300 for a typical line (HomeAdvisor, HomeGuide)$50 to $250 a linear foot (HomeAdvisor, HomeGuide)
- Replacing central AC on existing ducts
- $3,900 to $8,000; about $6,000 on average (HomeAdvisor, Fixr, Forbes Home)
- Swapping a heat pump on existing ducts
- $4,000 to $8,000; a 3-ton system about $3,900 to $6,200 (HomeAdvisor, Forbes Home, HomeGuide)
- A whole-home heat pump system
- commonly $14,000 or more (NYSERDA, Massachusetts EEAC, Fixr, HomeGuide)
- Replacing a gas furnace
- $3,800 to $6,200 at standard efficiency (HomeGuide, HomeAdvisor, Fixr, Forbes Home)$5,200 to $12,000 at high efficiency (90% AFUE and up) (HomeGuide, HomeAdvisor, Fixr, Forbes Home)
- Replacing an electric furnace
- $1,600 to $8,000, with a like-for-like swap at the low end (Fixr, HomeAdvisor)
- A single-zone mini-split
- $2,000 to $5,000 (HomeGuide, Fixr, Forbes Home)
- A multi-zone mini-split
- $3,000 to $14,000 for 2 to 4 zones (HomeGuide, Fixr, Forbes Home)
- An HVAC tune-up
- $70 to $350 a visit; a basic tune-up is often about $100 to $200 (HomeGuide, HomeAdvisor, Fixr)
Ranges from HomeAdvisor, HomeGuide, Fixr, Forbes Home, NYSERDA and the Massachusetts EEAC, checked September 2026.