How do you check a trade company's license?
Check a trade company on the California Contractors State License Board website before hiring. Match the license class to the work you need, such as C-20 for HVAC, C-10 for electrical, C-36 for plumbing, or B for general building. Confirm the license is current and the business name matches.
Start with the work itself. Heating and cooling work commonly falls under C-20, electrical work under C-10, plumbing work under C-36, and broader building work under B. The right class helps you compare companies that are prepared for the job you are asking about.
Use the California Contractors State License Board website to check the license record. Look for the business name, license class, current status, and any information that does not match what you were told. Save a screenshot or write down the details before you call.
A license check is only one part of hiring. It does not tell you if the estimate is clear, who will arrive, or how the crew handles questions. Use it as the first filter, then review the written scope and the company's communication.
What should recent reviews tell you?
Recent reviews should show how a company communicates, explains repairs, handles cleanup, and follows through after the work. Look for repeated details instead of one dramatic story. Check the date and source, then compare review comments with the written estimate and answers you receive before hiring.
Read several recent reviews and look for useful details. Comments about clear explanations, careful work, clean job areas, and accurate scheduling tell you more than a short rating alone. A pattern matters more than one unusually good or bad comment.
The published review record for ProLine Services is 5.0 stars from 69 reviews on Thumbtack, as of September 2026. That source gives you a place to start, but you should still ask direct questions about the work in front of you.
Pay attention to how the company responds when a review describes a problem. A calm answer with specific facts can show good communication. Avoid relying on reviews that make broad claims without describing the service, repair, or result.
Why should you get a written estimate first?
A written estimate gives you a clear record of the planned work, parts, labor, and possible exclusions before anyone starts. Costs can change with access, hidden damage, code requirements, and the repair method. Ask what is included, what could change, and when you will approve added work.
Ask for the estimate before tools come out. It should describe the problem, the planned repair or installation, the main materials, and the total price. If the wording is vague, ask the company to explain each line in plain language.
Trade work can uncover conditions that were not visible at first. A damaged wire behind a wall, a failed shutoff valve, or a crushed duct can change the job. The estimate should explain how added work will be handled and who must approve it.
Do not let a rushed decision replace a clear document. Compare estimates by scope, not just by the bottom line. A lower price may leave out testing, cleanup, access work, or a needed part, which can make the final result harder to compare.
Who will actually do the work?
Ask who will perform the work, who supervises the job, and who answers questions if the plan changes. You should know if the person giving the estimate will be involved in the repair. Clear responsibility helps you confirm the crew understands the equipment, wiring, pipes, or building work involved.
Ask whether the work will be handled by the company's own crew or another contractor. Then ask who will lead the job and how changes will be approved. These questions are useful for panel work, plumbing repairs, HVAC replacements, and remodeling projects.
Write down the main symptoms before the visit. Note unusual sounds, odors, leaks, breaker trips, weak airflow, rooms that stay hot, or times when the issue appears. This record helps the estimator connect your observations to the equipment.
You can also ask what testing will be done after the repair. For electrical work, that may include checking breakers, GFCI protection, or voltage. For HVAC work, it may include airflow and temperature checks. For plumbing, ask about leak testing and the operation of shutoff valves.
What should you ask before hiring a company?
Ask what license covers the work, what the estimate includes, who will perform the job, how changes are approved, and what testing happens before the crew leaves. Trust your judgment if someone pressures you to sign quickly. Clear answers and a calm process are useful signs before work begins.
Make a short question list before you call. Ask about the trade license, written scope, parts, cleanup, expected work area, and final testing. You should also ask what information the company needs from you before the appointment can be scheduled.
ProLine Services holds C-10, C-36, and B licenses. Our process is Consultation, Estimate, Scheduling, Installation or repair, and Final walkthrough. That order gives you a chance to review the plan before the work starts and ask questions at the end.
We serve Fresno and nearby communities with heating and cooling, electrical, plumbing, roofing, remodeling, and general contracting work. If the estimate is clear and the answers fit your project, you can make a better choice without relying on pressure.
What should you compare before hiring?
| Check | What to look for | Why it matters |
|---|---|---|
| License | The correct California class and a current record | Shows the company is matched to the trade |
| Written estimate | Scope, parts, labor, exclusions, and approval steps | Helps you compare the actual work |
| Recent reviews | Specific comments about communication and finished work | Shows repeated customer experiences |
| Assigned crew | Who performs, supervises, and answers questions | Makes responsibility clear |
| Testing | Checks for safe operation before the job ends | Helps confirm the repair or installation |
| Pressure | No demand for a rushed decision | Gives you time to review your choice |
Questions people ask
How can I verify an HVAC contractor's license in California?
Use the California Contractors State License Board website and search the business name or license information provided to you. For HVAC work, look for the C-20 classification. Review the current status and compare the listed business name with the name on the estimate before you approve the work.
What should a plumbing estimate include?
A plumbing estimate should identify the problem, the repair method, the main parts, labor, access work, cleanup, and possible exclusions. Ask how hidden damage or a failed shutoff valve would affect the scope. Get approval rules in writing before the crew starts extra work.
How many reviews should I read before hiring?
There is no useful magic number. Read enough recent reviews to notice patterns in communication, workmanship, cleanup, and follow-through. Check the review source and date, then ask your own project questions. Reviews can support your decision, but they should not replace a license check or written estimate.
What is a warning sign during the estimate?
A warning sign is pressure to sign before you understand the scope or price. Other concerns include vague answers, missing license information, unclear responsibility for the work, or refusal to explain possible changes. Take time to compare the document and choose a company that answers direct questions clearly.