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The directory in figures
64,702
Contractors
526
County pages
50
States
Sep 28, 2026
Busiest counties
- Los Angeles County
California · 7,047 contractors
- Orange County
California · 2,378 contractors
- San Diego County
California · 2,348 contractors
- Riverside County
California · 2,222 contractors
- San Bernardino County
California · 1,421 contractors
- Clark County
Nevada · 1,204 contractors
- Sacramento County
California · 1,164 contractors
- Santa Clara County
California · 1,098 contractors
- Alameda County
California · 798 contractors
- Contra Costa County
California · 794 contractors
- Ventura County
California · 776 contractors
- King County
Washington · 702 contractors
Browse by county
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Or browse a state: Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, Florida, Georgia, Hawaii, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin, Wyoming
Contractors by county
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Contractors listed per county. Select a state to see its counties and contractors.
Guides
All guides- Heat pump or furnace?
Published national ranges for replacing a gas or electric furnace, swapping a heat pump, a whole-home heat pump system and mini-splits, with the questions that decide which fits your home.
- How to verify a plumber or HVAC contractor
Where to check a plumber's or heating and cooling contractor's license in each state, what to ask about insurance, and what a written quote should include.
- How much does a plumber cost?
Published national ranges for a plumber's hourly rate, service call and after-hours visit, and for common jobs like clearing a drain or fixing a leak.
- Do you need a permit to replace a water heater, furnace or AC?
What state rules say about permits for swapping a water heater, furnace or air conditioner, in the states we've confirmed from official sources, and what a permit costs.
Get quotes from contractors in your county
One request instead of calling contractors one at a time. It's free.
Plumbing and HVAC cost estimator
A planning range for a water heater, a drain, a sewer line, an AC or a furnace, worked out from published national cost guides.
Run a plumbing or HVAC business? Claim your free listing
If your business does plumbing, heating or cooling work, it may already be listed here, whether we built the listing from a USDOT registration, a Google Business Profile or a state license list. Any of them is yours to claim. Once you're verified you can update your details, hours, services and photos. Claimed listings rank first in their county and are the first we pass quote requests to.
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