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Hamsco Construction Co
9418 HILLROSE STREET, Sunland, CA 91040, USA
Verify this license yourself at the California Contractors State License Board (CSLB).
Hamsco Construction Co is an HVAC contractor built around AC Services, helping Los Angeles homeowners and businesses keep cooling systems reliable through the city's long, warm months. The company works with residential and commercial customers across the area, from single-family homes to small office and retail spaces.
Services Offered
Service Area
About Hamsco Construction Co
Beyond air conditioning, Hamsco Construction Co provides Heating Services, Furnace Services, and Heat Pumps, giving customers options for both seasons. Its Ductwork Services address airflow problems, leaks, and poorly balanced rooms, while Thermostat Services help owners set up controls that run systems more evenly. Emergency HVAC calls are handled for urgent breakdowns, and scheduled Maintenance & Tune-up visits check components before peak demand arrives.
The company's Hamsco Construction Co contractor license, number 1065709, is listed in the California state contractor registry, and the business has been licensed since 2020. That record reflects more than six years of working in the trade in California.
People comparing local pros should look for clear service descriptions, a verifiable license, and straightforward communication before booking. Requesting a written estimate and confirming the scope of work can make the choice easier. Learn more about listed contractors through HVAC Service Fast.
State license record
California license #1065709
Active- Issued by
- Contractors State License Board (CSLB)
- Status
- Active as of Aug 4, 2026
- First issued
- May 2020 (6 years)
- Valid through
- May 31, 2028
- Business type
- Sole Owner
- County on file
- Los Angeles
What the license covers
- A General Engineering
- B General Building
- C-20 Warm-Air Heating, Ventilating and Air-Conditioning
- C-23 Ornamental Metal
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 Hamsco Construction Co offer?
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Local market — Los Angeles
HVAC pros here
1,329
Have a website
27%
Cooling demand
1,247
Heating demand
1,083
Cooling/heating demand = annual degree days (NOAA). Electricity = state residential average (EIA).
Local context for Los Angeles
- Hamsco Construction Co is one of 1,094 businesses we list for ac services in Los Angeles (1,329 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 Hamsco Construction Co
Based on the records we hold for this business.
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State license on record
CSLB lists #1065709 as active (record dated Aug 4, 2026). Licensed since 2020. 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.