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Harder Mechanical Contractors Inc
P O BOX 5118, Portland, OR 97208, USA
Verify this license yourself at the California Contractors State License Board (CSLB).
California's climate swings from coastal fog to inland heat waves, and that range puts real strain on heating and cooling equipment. Harder Mechanical Contractors Inc serves homeowners and property owners across the state with residential and commercial HVAC work. Its crews handle the everyday equipment problems that come with those conditions.
Services Offered
Service Area
About Harder Mechanical Contractors Inc
The company's services include AC Services, Heating Services, Ductwork Services, Heat Pumps, Furnace Services, Thermostat Services, Emergency HVAC, and Maintenance & Tune-up. Typical AC work involves checking system performance, cleaning coils, and testing airflow, while furnace service covers burner inspection, safety controls, and heat exchanger checks. Ductwork services address leaks, poor airflow, and sizing issues that quietly waste energy. Thermostat work includes installing and calibrating controls so systems respond as intended.
Harder Mechanical Contractors Inc holds California contractor license #277745 and has been licensed since 1972, which gives the company more than 54 years in the trade. Its work spans the state, so local conditions, from humid coastal summers to dry inland heat, shape how systems are installed and maintained.
Homeowners and facility managers comparing local pros can request written estimates, confirm license status through the California Contractors State License Board, and ask about a maintenance schedule suited to their equipment. For a side-by-side look at HVAC contractors near you, visit HVAC Service Fast.
State license record
California license #277745
Active- Issued by
- Contractors State License Board (CSLB)
- Status
- Active as of Aug 4, 2026
- First issued
- Jul 1972 (54 years)
- Valid through
- May 31, 2027
- Business type
- Corporation
What the license covers
- A General Engineering
- B General Building
- C-4 Boiler, Hot-Water Heating and Steam Fitting
- C-20 Warm-Air Heating, Ventilating and Air-Conditioning
- C-36 Plumbing
From CSLB public license data as of Aug 4, 2026. Licenses change — confirm the current status at the California Contractors State License Board (CSLB).
Frequently Asked Questions
What services does Harder Mechanical Contractors Inc offer?
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Local market — Portland
HVAC pros here
385
Have a website
77%
Cooling demand
413
Heating demand
4,235
Cooling/heating demand = annual degree days (NOAA). Electricity = state residential average (EIA).
Local context for Portland
- Harder Mechanical Contractors Inc is one of 171 businesses we list for ac services in Portland (385 HVAC businesses in total).
Buying a new AC or heat pump in California
- California is in the DOE Southwest region: new central air conditioners installed since January 1, 2023 must meet at least 14.3 SEER2 and 11.7 EER2 (13.8 SEER2 and 11.2 EER2 for systems 45,000 BTU/h and larger). Heat pumps must meet 14.3 SEER2 and 7.5 HSPF2 nationwide.
- Since 2025, new systems are built for lower-impact refrigerants such as R-454B or R-32. Ask which refrigerant a quoted system uses and for its AHRI certificate number, which confirms the matched system’s rated efficiency.
Before you hire Harder Mechanical Contractors Inc
Based on the records we hold for this business.
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State license on record
CSLB lists #277745 as active (record dated Aug 4, 2026). Licensed since 1972. Re-check it yourself before work starts — it is free and takes a minute. Look it up: California Contractors State License Board (CSLB)
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Ask for proof of insurance
We have no insurance details on file. Ask for a certificate of general liability and workers' compensation coverage before anyone works in your home.
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Ask who pulls the permit
Replacing an AC, furnace, heat pump or water heater usually needs a local permit and inspection. A licensed contractor normally pulls it — ask that the permit is included in the written quote.
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Ask for local references
We do not have review data for this business yet. Ask for two or three recent customers near you.
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California homeowner protection
California law caps the down payment on a home improvement contract at 10% of the contract price or $1,000, whichever is less. Never pay more up front.
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Where this information comes from
- Name, address and phone
- State license records · added Aug 4, 2026
- California license
- CSLB public license data · record date Aug 4, 2026
- Profile summary
- Written automatically from the records above
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HVAC Service Fast is an independent HVAC directory and is not affiliated with this business. Listing details are compiled from publicly available information and may be incomplete or outdated. We do not endorse or guarantee any provider — please verify licensing and insurance directly. See our Disclaimer.