All Air Mechanical Contractor
HVAC contractor in South San Francisco, California 94080
- Rating
- 4.0 / 5.0 from 5 reviews
- Address
- 535 Railroad Ave, South San Francisco, CA 94080
- Website
- allairmechanical.com/
- Service area
- South San Francisco
- Phone
- (650) 615-0248
About
All Air Mechanical Contractor is an HVAC contractor serving South San Francisco. The business is located at 535 Railroad Ave and can be reached at (650) 615-0248. It holds a 4.0 of 5 rating from 5 Google reviews.
Service Area
Serving South San Francisco.
Hiring an HVAC Contractor in South San Francisco, California
In California, HVAC contractors must hold a C-20 license—Warm-Air Heating, Ventilating and Air-Conditioning Contractor—issued by the Contractors State License Board (CSLB). Before hiring any contractor, verify their current license status on the CSLB website. You can search by license number or business name. A valid license confirms the contractor meets state requirements and allows you to check for any complaints or enforcement actions against them.
Building permits are required for most HVAC work in California. The California Building Standards Code mandates that installations, alterations, and improvements must be permitted through your local building department. Code requirements vary by city and county, so contact your local building department in South San Francisco to confirm what permits your specific project needs. Your contractor should be familiar with local requirements and help navigate the permitting process.
When you're ready to hire, ask your contractor about their license status, confirm they'll obtain necessary permits, and review the contract carefully. Request references and understand the scope of work, timeline, and payment terms before signing. The CSLB provides resources on what to look for in contractor agreements and how to protect yourself as a homeowner.
What license does an HVAC contractor need in California?
HVAC contractors in California must hold a C-20 license (Warm-Air Heating, Ventilating and Air-Conditioning Contractor) from the California Contractors State License Board. [1]
How do I verify an HVAC contractor's license?
Visit the CSLB online license check tool at cslb.ca.gov and search by the contractor's license number or business name. You can verify their license status and view any complaint disclosures. [4]
Do I need a building permit for HVAC work?
Yes, under the California Building Standards Code, HVAC installations, alterations, and improvements require a separate permit from your local building department. Contact your local building department in South San Francisco to confirm requirements for your project. [3]
Who should I ask about permit requirements for my HVAC project?
Contact your local building department in South San Francisco. Code requirements vary by city and county, so your local department will tell you exactly what permits your project needs. [3]
What should I ask a contractor before hiring?
Confirm they hold a valid C-20 license, ask how they'll handle permits for your project, and review the full contract before signing. The CSLB recommends reading their 'Hiring a Contractor' page for guidance on what to look for in binding agreements. [1, 2]
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
Address: 535 Railroad Ave, South San Francisco, CA 94080
Phone: (650) 615-0248
Website: http://www.allairmechanical.com/