ON TIME HVAC SF
HVAC contractor in San Francisco, California
- Open
- 5 days a week
- Website
- ontimehvacsf.com/
- Service area
- San Francisco, San Mateo, Oakland
- Phone
- (415) 877-3278
About
ON TIME HVAC SF serves San Francisco, San Mateo, and Oakland with commercial heating and air conditioning, commercial refrigeration repair, and kitchen hood exhaust ventilation repair. The company works with Carrier, Lennox, Bryant, and York equipment. EPA-certified technicians have a minimum of 10 years of service experience and understand the food hospitality industry's dependence on functioning refrigeration and ventilation equipment.
Weekday hours are 8 AM to 5 PM Monday through Friday. Emergency service is available Saturday and Sunday. Call (415) 877-3278 in San Francisco or (650) 660-8620 in San Mateo.
Services
- Commercial HVAC service
- Heating and air conditioning maintenance
- Commercial refrigeration repair
- Kitchen hood exhaust ventilation repair
- Captiveaire exhaust blower service
Service Area
Serving San Francisco, San Mateo, Oakland.
Frequently Asked Questions
What brands do you service?
ON TIME HVAC SF works with Carrier, Lennox, Bryant, and York equipment.
Are your technicians certified?
Yes, technicians are EPA-certified with a minimum of 10 years of service experience.
Do you offer emergency service on weekends?
Yes, emergency service is available Saturday and Sunday.
What areas do you serve?
Primary service areas are San Francisco, San Mateo, and Oakland for quick response on repairs.
Hiring an HVAC Contractor in San Francisco, California
In California, HVAC work falls under two contractor classifications: the C-20 (Warm-Air Heating, Ventilating and Air-Conditioning Contractor) license for standard heating and cooling, and the C-38 (Refrigeration Contractor) license for refrigeration systems. Most residential and commercial HVAC projects require a building permit from your local building department. San Francisco has its own building department with specific code requirements. Before hiring any contractor, verify their license through the California Contractors State License Board (CSLB).
To check a contractor's license status, visit the CSLB's online license verification tool. You can search by contractor license number (an 8-digit number found on their plastic pocket license), business name, or the owner's name. The CSLB database shows license status and any complaint disclosures, helping you confirm the contractor is properly licensed and in good standing.
Work with your contractor and local building department to understand permit requirements for your specific project. Building and structure work in California requires permits according to the California Building Standards Code, though requirements vary by city and county. Contact the San Francisco Building Department to determine what permits apply to your HVAC or refrigeration work before signing a contract.
What license types do HVAC contractors need in California?
HVAC contractors typically hold a C-20 (Warm-Air Heating, Ventilating and Air-Conditioning Contractor) license. Refrigeration work requires a C-38 (Refrigeration Contractor) license. [1]
How do I check an HVAC contractor's license?
Use the CSLB's online license checker at cslb.ca.gov/OnlineServices/CheckLicenseII/CheckLicense.aspx. Search by the contractor's 8-digit license number, business name, or owner name to verify status and complaint history. [4]
Do I need a building permit for HVAC work in San Francisco?
According to California Building Standards Code, most building work requires a permit. Contact the San Francisco Building Department to confirm what permits apply to your specific HVAC or refrigeration project. [3]
Where is the San Francisco Building Department?
The San Francisco Building Department handles permits for the city. Check the CSLB's building department directory at cslb.ca.gov/Consumers/Hire_A_Contractor/Building_Permit_Requirements.aspx for contact information. [3]
What should I ask a contractor before signing a contract?
Before signing, verify the contractor holds an active C-20 or C-38 license through the CSLB, confirm whether your project requires permits, and ask about your local building department's code requirements for your area. [2, 3]
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 AM – 5 PM |
|---|---|
| Tuesday | 8 AM – 5 PM |
| Wednesday | 8 AM – 5 PM |
| Thursday | 8 AM – 5 PM |
| Friday | 8 AM – 5 PM |
| Saturday | Closed |
| Sunday | Closed |