Porter Boiler Service Inc
Services
Services estimated based on license classification. Claimed businesses can customize their service list.
About the B — General Building License
A General Building (Class B) license is one of the most common contractor licenses in California. It authorizes the holder to construct, alter, or repair buildings and structures. This includes residential homes, commercial buildings, and industrial facilities. A Class B contractor can use two or more unrelated building trades on a single project, making them ideal for comprehensive construction and renovation work. They often serve as the primary contractor who coordinates subcontractors for specialized trades. When hiring a General Building contractor, homeowners should verify the license is active and in CLEAR status, confirm adequate insurance coverage, and always get a detailed written contract before work begins. General Building contractors must maintain a $25,000 contractor bond and carry workers' compensation insurance if they have employees.
About the C-4 — Boiler, Hot Water Heating & Steam Fitting License
The C-4 Boiler, Hot Water Heating and Steam Fitting license authorizes contractors to install, maintain, and repair boilers, hot water heating systems, and steam fitting equipment. This specialized trade requires deep knowledge of pressure systems, safety protocols, and building codes. C-4 contractors work on both residential and commercial projects, from home radiant heating systems to large commercial boiler installations. Given the potential safety hazards of pressurized heating systems, it is critical to hire only licensed professionals for this type of work. California requires regular inspections of commercial boiler systems, making qualified C-4 contractors essential for building owners. When hiring, verify the contractor has experience with your specific type of system and ask about their emergency service availability.
💡 Tips for Hiring a General Building Contractor
- Always get at least three written estimates before choosing a contractor
- Verify the contractor pulls all required building permits
- Ask about their warranty policy for completed work
- Confirm they carry general liability insurance
- Never pay more than 10% or $1,000 down (whichever is less) per California law
✅ Verify This License
Always verify contractor licensing directly with the Contractors State License Board (CSLB) before hiring. You can look up license #239280 to confirm it is active and check for any complaints or disciplinary actions.
Check on CSLB.ca.gov →🏢 Are you Porter Boiler Service Inc?
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Claim This Page →Frequently Asked Questions
What is the difference between a Class A and Class B contractor license?
A Class A (General Engineering) license covers infrastructure projects like roads, bridges, and utilities. A Class B (General Building) license covers building construction, remodeling, and structural work on homes and commercial properties.
Can a Class B contractor do electrical or plumbing work?
A Class B contractor can coordinate subcontractors for specialty trades like electrical and plumbing. However, the actual electrical or plumbing work must be performed by appropriately licensed C-10 or C-36 subcontractors unless the B contractor also holds those specialty licenses.
What does a C-4 license cover?
A C-4 license covers the installation, maintenance, and repair of boilers, hot water heating systems, steam fitting, radiant floor heating, and hydronic heating systems in both residential and commercial buildings.
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