Plumbers and heating and cooling contractors in Hawaii

159 plumbers and heating and cooling contractors are listed in Hawaii. 90 hold an active USDOT registration. The 2 counties listed below have at least 15 each and account for 139 of them.

Hawaii licenses plumbing businesses with a C-37 contractor license and plumbers as masters or journeyworkers.^{1, 2, 3} Heating and cooling businesses in Hawaii hold a C-52 contractor license.² Counties in Hawaii run permitting and set the permit rules.⁴

Counties

County	Contractors
Honolulu County	87
Hawaii County	52

Other counties in Hawaii

20 contractors in 2 counties with fewer than 15 listings.

Plumbing and HVAC rules in Hawaii

Plumbing license: State license.^{1, 2, 3}
Heating and cooling license: State license.²
State codes: Hawaii's State Building Code Council doesn't list a mechanical code among the codes it has adopted.⁴
Replacement permits: In Hawaii, the State Building Code Council adopts the codes, and each county adopts them with its own amendments and runs permitting. Permit rules are set by the county.⁴

Plumbing and HVAC rules in Hawaii

What plumbing and HVAC work costs in Hawaii

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)
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 Hawaii

Counties

Other counties in Hawaii

Plumbing and HVAC rules in Hawaii

What plumbing and HVAC work costs in Hawaii

Sources