Castro Air Conditioner Repair
HVAC contractor in San Francisco, California
- Rating
- 5.0 / 5.0 from 27 reviews
- Open
- 7 days a week
- Service area
- San Francisco
- Phone
- (415) 582-6736
About
Castro Air Conditioner Repair serves San Francisco with HVAC work. The business holds a 5.0 rating based on 27 Google reviews. Hours run 8:30 AM to 9 PM every day of the week. Reach them at (415) 582-6736.
Service Area
Serving San Francisco.
Hiring an HVAC Contractor in San Francisco, California
HVAC contractors in California must hold a state license. The Contractors State License Board (CSLB) classifies HVAC work under license type C-20, Warm-Air Heating, Ventilating and Air-Conditioning Contractor. Before hiring, verify that any contractor you contact carries an active C-20 license.
You can check a contractor's license status online through the CSLB website. Enter either the contractor's license number (up to 8 digits) or business name to confirm their license is current and to view any complaint disclosure. This step takes just a few minutes and protects you from unlicensed work.
Many HVAC projects in San Francisco require a building permit from the city's building department. Code requirements vary by location, so contact San Francisco's building department before work begins to confirm whether your project needs a permit. Your contractor should advise you on permit requirements as part of the estimate.
What license type must an HVAC contractor have in California?
HVAC contractors in California must hold a state C-20 license, classified as a Warm-Air Heating, Ventilating and Air-Conditioning Contractor by the Contractors State License Board. [1]
How do I verify an HVAC contractor's license?
Visit the CSLB website and use the license check tool. Enter the contractor's license number or business name to confirm their license is active and view any complaint history. [2, 4]
Do I need a building permit for HVAC work in San Francisco?
Building code requirements vary by location. Check with San Francisco's building department before work starts to determine whether your project requires a permit. [3]
What should I ask an HVAC contractor before hiring?
Ask to see their current C-20 license, verify they are in good standing with the CSLB, and clarify whether your project will need a building permit and which contractor will handle permit applications. [1, 2, 4]
Can I look up a contractor by business name instead of license number?
Yes. The CSLB license check tool allows you to search by contractor business name. If your search returns multiple results, type fewer characters to narrow the list. [4]
What is a C-20 license used for?
A C-20 license covers warm-air heating, ventilating, and air-conditioning work, which includes installation, repair, and maintenance of HVAC systems. [1]
Sources
- California CSLB — licensing classifications (read 2026-09-20)
- California CSLB — hire a licensed contractor (read 2026-09-20)
- California CSLB — do I need a building permit? (read 2026-09-20)
- California CSLB — check a license (read 2026-09-20)
Contact Information
Business Hours
| Monday | 8:30 AM – 9 PM |
|---|---|
| Tuesday | 8:30 AM – 9 PM |
| Wednesday | 8:30 AM – 9 PM |
| Thursday | 8:30 AM – 9 PM |
| Friday | 8:30 AM – 9 PM |
| Saturday | 8:30 AM – 9 PM |
| Sunday | 8:30 AM – 9 PM |