HVAC in San Francisco, CA: how do you get written quotes?

Key facts for hiring an HVAC contractor in San Francisco

• San Francisco's application describes work on pipes transporting hot or cool air. Read 2026-10-22: Apply for a plumbing and mechanical permit
• The city's combined-work instruction is reproduced in the permit answer. Use it to separate the work in your request. Read 2026-10-22: Apply for a plumbing and mechanical permit
• California's C-20 classification is the board's warm-air heating, ventilating and air-conditioning category. Use the board material after your pick. Read 2026-11-04: C-20 - Warm-Air Heating, Ventilating and Air-Conditioning Contractor

How do you get written quotes on one scope?

For a San Francisco HVAC request, describe the floors involved, the number of components and access to the air pipes. Those are details the city application asks about; including them in your scope helps make the written quotes comparable. Ask each quote to separate equipment, pipe changes, removal and permit handling. Read 2026-10-22: Apply for a plumbing and mechanical permit

1. Describe the job once, using the scope checklist below, built from what we found for San Francisco.
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

What should a written HVAC scope in San Francisco list?

Keep a furnace repair scope distinct from a replacement proposal. Describe the symptom, the equipment you want retained and any air-pipe changes. Ask the quote to distinguish mechanical work from plumbing work; the city's own combined-work instruction appears in the permit answer. Read 2026-10-22: Apply for a plumbing and mechanical permit

• The equipment: capacity, efficiency rating and model, in writing
• Gas line and venting checks if the system burns gas, as many of San Francisco's homes do
• Whether your job is one San Francisco's page quoted below lists (cutting into or replacing pipes), and who applies for the permit if one applies to your job
• Whether your job is one San Francisco's page quoted below lists (pipes that transport hot air or cool air), and who applies for the permit if one applies to your job
• Whether your job is one San Francisco's page quoted below lists (plumbing and mechanical work), and who applies for the permit if one applies to your job
• 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 Francisco?

San Francisco's permit page (read 22 October 2026): “You need a permit before cutting into or replacing pipes, particularly pipes that will be covered by a wall or buried in the ground. See exemptions in San Francisco Plumbing Code Section 104.2.” Open San Francisco's source page

San Francisco's permit page (read 22 October 2026): “Apply online for a permit to cut into or replace pipes that transport water, gas, hot air, or cool air without plans.” Open San Francisco's source page

San Francisco's permit page (read 22 October 2026): “When doing both plumbing and mechanical work, apply for separate permits for plumbing work and mechanical work.” Open San Francisco's source page

What license does an HVAC contractor need in San Francisco?

After you pick an HVAC contractor for your San Francisco project, you can read the California Contractors State License Board's C-20 classification and use its public lookup for the selected contractor. Keep that identity step after the pick; compare the scope of the anonymous quotes first. Classification read 2026-11-04: C-20 - Warm-Air Heating, Ventilating and Air-Conditioning Contractor

The public board lookup offers a license-number search. After your pick, open the lookup and follow the instructions there. Read 2026-11-01: Check A License

California license lookup guide

Furnace repair in San Francisco

For furnace repair, identify your home's actual heat source before comparing repair and replacement scopes. The San Francisco Census heating-fuel estimate has a margin of error of ±0.7 percentage points at 90% confidence for its utility-gas share (ACS 2020–2024). That city estimate describes occupied homes, not the system or condition of the furnace in your home. Read 2026-10-17: American Community Survey B25040

Ask which heat source the quoted equipment will use.

Median hourly wage for Heating, Air Conditioning, and Refrigeration Mechanics and Installers in the San Francisco-Oakland-Fremont, CA area, May 2025: $37.73 (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 Francisco permit page, read 22 October 2026: www.sf.gov
• cslb.ca.gov, read 4 November 2026: www.cslb.ca.gov
• BLS Occupational Employment and Wage Statistics (series OEUM004186000000049902108), May 2025, read 17 October 2026: api.bls.gov
• U.S. Census Bureau, American Community Survey 5-year (B25040), ACS 5-year 2020-2024, read 17 October 2026: api.census.gov

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