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Plumbers and heating and cooling contractors in St. Mary's County, MD

  • 59

    Contractors

  • 23

    With Google ratings

  • 25

    Registered 10+ years

59 plumbers and heating and cooling contractors are listed in St. Mary's County. 38 hold an active USDOT registration.

Of the 38 with a fleet size on record, 31 run one to three trucks, 4 run four to ten and 3 run more than ten. Mechanicsville has the most contractors with 8, then Hollywood with 7 and Mechanicsvlle with 5.

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Contractors 1 to 50 of 59

  1. Hancock Refrigeration Heating & Air Conditioning
    Leonardtown5.0 from 877 reviews via Google
    (301) 321-8746
  2. Winters Heating & Cooling
    Leonardtown5.0 from 581 reviews via Google
    (301) 475-5611
  3. Wathen Enterprises, LLC
    Hollywood5.0 from 121 reviews via Google
    (240) 384-8828
  4. THC
    Ridge5.0 from 116 reviews via Google
    (301) 872-0092
  5. Sta So Cool LLC
    Hollywood5.0 from 112 reviews via Google
    (301) 904-3936
Map of plumbers and heating and cooling contractors in St. Mary's County, MD
Pins mark ZIP code areas. A number shows how many contractors share that ZIP code.
  1. NFS Heating & A/C Services LLC
    5.0 from 77 reviews via Google
    (301) 659-4459
  2. Plan B Bathroom Remodeling, LLC
    Chaptico5.0 from 60 reviews via Google
    (240) 577-4849
  3. Consider it Done Home Services LLC
    5.0 from 24 reviews via Google
    (301) 202-1792
  4. Boothe's Heating, Air, Plumbing, Drains, & Electrical
    Hollywood4.9 from 4700 reviews via Google
    (301) 264-8968
  5. Taylor Gas Heating Air
    Lexington Park4.9 from 477 reviews via Google
    (301) 288-3797
  6. R E Graves Heating & Air Conditioning LLC
    Hollywood4.9 from 387 reviews via Google
    (301) 880-3248
  7. Halls Hvac LLC
    Avenue4.9 from 225 reviews via Google
    (301) 769-4999
  8. Abbotts Plumbing
    4.9 from 69 reviews via Google
    (301) 478-6700
  9. Tri-County Aire
    Charlotte Hall4.8 from 380 reviews via Google
    (800) 890-5123
  10. Matters Plumbing
    California4.8 from 112 reviews via Google
    (410) 570-0266
  11. Cliff's Heating Air Conditioning Sheet Metal
    Mechanicsville4.8 from 52 reviews via Google
    (301) 884-8167
  12. May's Plumbing, LLC
    Mechanicsville4.8 from 19 reviews via Google
    (301) 472-4513
  13. AAMCO Transmissions & Total Car Care
    Lexington Park4.7 from 299 reviews via Google
    (301) 880-0011
  14. C and C Plumbing & Septic Inc
    Hollywood4.7 from 67 reviews via Google
    (301) 373-2233
  15. Hunt Plumbing Heating & AC
    Mechanicsville4.5 from 84 reviews via Google
    (301) 202-1556
  16. Affordable Plumbing And Heating
    4.5 from 37 reviews via Google
    (301) 228-0822
  17. Boothe's Heating and Air Conditioning LLC
    Hollywood
    (301) 373-4247
  18. T N Bowes Heating and Air Conditioning Inc
    Mechanicsville
    (301) 884-9572
  19. All Mechanical & Plumbing LLC
    Mechanicsville
    (301) 884-6093
  20. Downs Plumbing & Septic
    Leonardtown
    (301) 997-4080
  21. Great Mills Heating and Air Conditioning Inc
    Lexington Park
    (301) 994-0522
  22. Eugene Copsey Plumbing Septic & Well
    Mechanicsville
    (301) 884-3239
  23. Simmons Heating & Air Conditioning Corporation
    Hollywood
    (301) 373-4780
  24. WF Downs Plumbing LLC
    Clements
    (240) 925-0774
  25. B&N Hvac LLC
    Mechanicsvlle
    (301) 752-7882
  26. S & J Heating & Air Conditioning
    Clements
    (301) 769-3375
  27. Stirling Plumbing Services LLC
    Mechanicsville
    (301) 997-4588
  28. Trossbach Mechanical
    Drayden
    (301) 672-3693
  29. Advantage Mechanical Services LLC
    Hollywood
    (240) 808-8300
  30. Affordable Plumbing and Heating
    Leonardtown
    (301) 475-9506
  31. B&C Mechanical and Welding LLC
    Lexington PK
    (240) 561-0500
  32. B&W Plumbing LLC
    Park Hall
    (410) 394-1881
  33. Bodnar Mechanical
    Drayden
    (240) 538-7001
  34. Breton Breeze Mechanical LLC
    Leonardtown
    (301) 904-2513
  35. C Sampson Mechanical
    Mechanicsville
    (301) 373-3425
  36. D B Plumbing
    Ridge
    (301) 872-4127
  37. E&M Plumbing & Heating Inc
    Bushwood
    (301) 769-2519
  38. GM Mechanical Inc
    Mechanicsville
    (301) 884-0444
  39. Hunt Plumbing Heating and Air Conditioning LLC
    Mechanicsvlle
    (301) 884-7110
  40. Hvac Mechanical Service LLC
    Mechanicsville
    (800) 771-3922
  41. J Stone Mechanical LLC
    Clements
    (301) 536-3390
  42. Lacey Plumbing & Heating
    Avenue
    (301) 769-3912
  43. Leo Bean Plumbing
    Hollywood
    (301) 373-6220
  44. Prime Plumbing and Heating
    California
    (240) 587-2327
  45. Quality Heating and Cooling Inc
    Hollywood
    (301) 373-9610
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Services in St. Mary's County

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Homes in St. Mary's County

Half the homes in St. Mary's County were built before 1992, 30% before 1980 and 10% before 1960. (Census Bureau American Community Survey table B25035, 2020 to 2024 5-year estimates; Census Bureau American Community Survey table B25034, 2020 to 2024 5-year estimates)

From 1991 to 2020, St. Mary's County averaged 4,053 heating degree days and 1,328 cooling degree days a year. (NOAA NCEI nClimDiv county heating degree days, 1991 to 2020 averages; NOAA NCEI nClimDiv county cooling degree days, 1991 to 2020 averages)

In St. Mary's County, 62% of occupied homes heat with electricity, 13% with fuel oil or kerosene and 12% with utility gas. (Census Bureau American Community Survey table B25040, 2020 to 2024 5-year estimates)

Plumbing and HVAC rules in Maryland

What plumbing and HVAC work costs in Maryland

Ranges are national; ask contractors near you.

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)
An HVAC maintenance plan
$120 to $500 a year (HomeGuide, Fixr)

Ranges from HomeAdvisor, HomeGuide, Fixr, Forbes Home, NYSERDA and the Massachusetts EEAC, checked September 2026.

What plumbing and HVAC work costs in Maryland

Rules in Maryland

Maryland licenses master, journeyperson and apprentice plumbers through its State Board of Plumbing.1, 2, 3 Heating and cooling contractors in Maryland are licensed by a separate state board.4 Your local building department in Maryland can tell you whether replacing a water heater, furnace or AC needs a permit.

Plumbing and HVAC rules in Maryland

Nearby counties

Sources

  1. Maryland Department of Labor ↑
  2. Maryland Department of Labor ↑
  3. Maryland Department of Labor ↑
  4. Maryland Department of Labor ↑