HVAC in San Jose, CA: put the work in writing

Key facts for hiring an HVAC contractor in San Jose

• The SAN JOSE, CA US station records 2,039.6 annual heating degree days in NOAA's 1991–2020 normals, base 65°F. Source: U.S. Climate Normals (read 2026-10-17).
• San Jose heat-source mix: see the written-quote section.
• San Jose ductwork and furnace permit wording: see the city source extracts.

How to get written quotes on one scope

Name the heat source in your San Jose request: the ACS 2020–2024 estimates report utility gas in 58.0% of occupied homes (±0.7 percentage points) and electricity in 36.6% (±0.7 percentage points). These city shares do not identify the system in your home. Source: American Community Survey: House Heating Fuel (read 2026-10-17).

After you pick an HVAC contractor for San Jose, you can open the CSLB lookup by contractor licence number or business name and read the classification shown. Contractor License Lookup (read 2026-10-22).

1. Describe the job once, using the scope checklist below, built from what we found for San Jose.
2. Post it on InstaBids and send it.
3. Every quote is written against the same scope, so they compare line by line.
4. You choose who gets your number.
5. Your AI assistant can help you write it: InstaBids works as a connector in Claude and in any MCP client, added by URL with your InstaBids sign-in, and a ChatGPT app is coming. You send the request yourself. Connect an assistant

Your written scope for a heating or air-conditioning job in San Jose

• The equipment: capacity, efficiency rating and model, in writing
• The heating side too: San Jose's heating degree days mean the system heats as well as cools
• Gas line and venting checks if the system burns gas, as many of San Jose's homes do
• Whether your job falls outside the San Jose permit exemption quoted below, and if it needs a permit, who pulls it
• Who pulls the San Jose permit for furnace replacement, and when the inspection is booked
• Removal and disposal of the old parts or materials
• Warranty terms on parts and labor, in writing

Do you need a permit for a heating or air-conditioning job in San Jose?

San Jose's permit page (read 17 October 2026): “A mechanical permit is required for installing, altering, or replacing ductwork, especially when changing HVAC equipment capacity, extending lines, or penetrating the building envelope.” Open San Jose's source page

San Jose's permit page (read 17 October 2026): “These types of simple projects do not require a mechanical permit:” “Appliance repairs that do not alter the appliance’s original approval and listing.” Open San Jose's source page

San Jose's permit page (read 17 October 2026): “Installing or replacing a furnace generally requires three permits; these can all be obtained through one application at SJPermits.org.” Open San Jose's source page

San Jose's permit page (read 17 October 2026): “Plug-in window air conditioners, portable fans and heaters, and electric logs do not require a permit.” Open San Jose's source page

What license does an HVAC contractor need in California?

California CSLB, C-20 classification, in its own words: A warm-air heating, ventilating and air-conditioning contractor fabricates, installs, maintains, services and repairs warm-air heating systems and water heating heat pumps, complete with warm-air appliances; ventilating systems complete with blowers and plenum chambers; air-conditioning systems complete with air-conditioning unit; and the ducts, registers, flues, humidity and thermostatic controls and air filters in connection with any of these systems. This classification shall include warm-air heating, ventilating and air-conditioning systems which utilize solar energy. C-20 - Warm-Air Heating, Ventilating and Air-Conditioning Contractor (read 2026-11-04).

California license lookup guide

AC repair in San Jose

For a San Jose repair request that includes replacement equipment, put climate sizing in the scope: the SAN JOSE, CA US station records 763.5 annual cooling degree days in the 1991–2020 normals, base 65°F. Source: U.S. Climate Normals (read 2026-10-17).

Ask which heat source the quoted equipment will use.

NOAA explains: “The degree day is one measure of the weather related energy demand.” Ask for equipment sized to that climate.

Median hourly wage for Heating, Air Conditioning, and Refrigeration Mechanics and Installers in the San Jose-Sunnyvale-Santa Clara, CA area, May 2025: $39.45 (U.S. Bureau of Labor Statistics, Occupational Employment and Wage Statistics).

This is what workers in this occupation are paid per hour. It is not what a contractor charges for a job.

How does InstaBids work?

InstaBids does not hold payment for the work; you pay the contractor directly on the terms of the bid you accepted.

How is InstaBids different?

Each bidder appears under a stable label such as Contractor A, so you judge the work, not the brand.

Contact details stay hidden until the homeowner picks a contractor and they confirm the connection.

The contact-detail filter can miss disguised contact details.

Sources for the facts on this page

• San Jose permit page, read 17 October 2026: www.sanjoseca.gov
• San Jose permit page, read 17 October 2026: www.sanjoseca.gov
• cslb.ca.gov, read 4 November 2026: www.cslb.ca.gov
• BLS Occupational Employment and Wage Statistics (series OEUM004194000000049902108), May 2025, read 17 October 2026: api.bls.gov
• NOAA NCEI U.S. Climate Normals 1991-2020, read 17 October 2026: www.ncei.noaa.gov
• U.S. Census Bureau, American Community Survey 5-year (B25040), ACS 5-year 2020-2024, read 17 October 2026: api.census.gov
• NOAA CPC degree-day definition, read 3 November 2026: www.cpc.ncep.noaa.gov

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.