How to Choose a Low Voltage Contractor in California

Start with the license, because everything else depends on it#

California requires a state contractor license for almost every commercial low voltage job. The exemption for small work is capped at $1,000 in labor and materials and does not apply when a permit is required or the contractor has employees, which rules out nearly any commercial project. The classification you want to see is C-7 Low Voltage Systems, which covers communication and low voltage systems that do not exceed 91 volts: structured cabling, telephone, CATV, CCTV, sound, intercom and the low voltage side of access control. A C-10 Electrical contractor is also licensed to perform this work.

The license can be verified at cslb.ca.gov. Open Check a License and search by license number or business name. The record tells you the classification, whether the license is active, the bond amount, the workers compensation carrier and policy dates, the personnel on the license, and any disciplinary history. Two things to confirm while you are there. First, that the classification actually covers the scope you are buying; a C-7 cannot legally install fire alarm, and neither a C-7 nor a C-10 can sell or monitor burglar alarms without a separate license from the Bureau of Security and Investigative Services. Second, that the business name on the bid matches the name or the DBA on the record. A contractor may bid under a DBA, which is normal, but the names should line up.

Hiring an unlicensed contractor in California is not a paperwork problem. Under Business and Professions Code section 7031, an unlicensed contractor cannot sue to collect payment, and an owner can recover everything already paid. Your general liability carrier and, on funded projects, your funding agency will ask the same question you should ask first.

Telelink Business Services is a licensed C-7 Low Voltage Systems Contractor, CSLB License #472017, in business since 1983. The C-7 license explainer goes into what the classification covers and excludes in more detail.

Confirm the bond, the insurance and the workers comp#

Every active California contractor carries a $25,000 contractor license bond, the statutory amount since January 1, 2023. The bond protects you if the contractor violates the license law; it is not project insurance. For that you want two certificates.

General liability insurance covers damage the contractor causes to your building or a third party. On commercial work, $1,000,000 per occurrence is the common floor and $2,000,000 is typical for contractors who work under general contractors. Ask for a certificate that names your entity as additional insured with a primary and noncontributory endorsement, and a waiver of subrogation if your contract requires it.

Workers compensation is mandatory for any contractor with employees, and since January 1, 2023 a handful of classifications (C-8, C-20, C-22 and D-49) have had to carry it whether or not they report employees. SB 1455 extends that to every active license on January 1, 2028. Until that date a sole owner working without employees can still file a valid exemption, so the question is not whether an exemption is allowed but whether the one on file matches the crew that will actually be on your site. The CSLB record shows the carrier and policy dates or the exemption; ask for the certificate, and if a bidder claims exemption while proposing a four-person crew, that is the discrepancy worth raising.

The for general contractors page lists what a complete prequalification packet contains if you want a checklist to hand to every bidder.

Ask who is actually doing the work#

This question changes what you are buying. Some low voltage companies install with their own technicians. Others sell the job and hand the labor to a subcontractor or a staffing firm, then put their name on the closeout. Both are legal. A self-performing contractor gives you a crew that reports to the person who bid the job and a company that signs its own test results.

Ask plainly: “Are the technicians on this job your employees?” If the answer is no, ask who they are, what license and insurance they carry, and who is responsible when something fails at turnover. A contractor who self-performs will answer yes without qualification.

At Telelink the technicians who show up are our employees. That means the crew reports to the people who bid and scheduled the job, and the company that signs the test results and the labor warranty is the company that performed the work. The scopes described in our project case studies were installed by those crews.

Check experience on your building type, not just your system type#

A contractor who has pulled a thousand Cat6 drops in empty office shells may never have worked in an occupied senior housing building with residents in every unit and a nurse call system that cannot go dark overnight. The sequencing, the resident notice and the cutover plan are what differ, and they are what the schedule turns on.

Ask for references on your building type and call them. Useful questions: Did the crew keep the schedule? How did they handle residents, staff or students in the building? Was the closeout documentation complete on the first delivery? Would you put them on the next bid list? If a bidder cannot name a project in your building type, that is itself an answer, and it matters more on an occupied building than on an empty shell.

If your project is one of the building types we work in most, the markets pages explain what changes for each: multifamily and affordable housing, senior living, government and public works, education, healthcare, office tenant improvement and industrial.

Compare scope before you compare price#

Low voltage bids are easy to make cheap by leaving things out. Before you look at the numbers, line the proposals up by what they include. A complete proposal for a cabling or systems job in a commercial building will state, in writing:

• The specification sections or systems covered, and the ones excluded.
• Cable category and rating (plenum or riser), connector and jack types, and the manufacturer or an “or equal” statement.
• Pathways: who provides conduit, sleeves, J-hooks, cable tray and firestopping at rated penetrations.
• Testing: permanent link certification for every copper drop and Tier 1 (and Tier 2 where specified) testing for fiber, with results delivered.
• Labeling to a stated scheme and as-built drawings at closeout.
• Where the electrical handoff is: power to racks, dedicated circuits and the bond to building ground are the electrician’s work.
• Where the door hardware handoff is on access control jobs: electrified locks and strikes are Division 08 or a C-28 contractor.
• Whether fire alarm is excluded (it should be, from any C-7 bid) and who the fire alarm contractor is.
• Warranty terms for labor and for the manufacturer system, if a certified system warranty is offered.
• Schedule assumptions, including after hours work and phasing in an occupied building.

If a bid is silent on any of these, ask. A bid that does not state exclusions is not comparable to one that does. The Division 27 and 28 spec checklist is written for the people writing the spec, and it doubles as a bid comparison sheet.

Make sure testing and documentation are in the proposal#

Testing and labeling are what separate a maintainable cabling plant from one that produces intermittent faults. Every copper permanent link should be certified with a calibrated tester and the results delivered to you, not summarized in an email. Every fiber strand should be tested with a light source and power meter at minimum, with OTDR traces where the spec calls for them. Every cable, jack, patch panel port and rack should carry a label that matches the drawings.

Ask what the closeout package includes. The right answer is test results, labeled as-builts, an equipment schedule with serial numbers, warranty paperwork and, for cameras, access control, intercom and phones, a configuration export and the administrator credentials. If any of that is missing from the proposal, it will be missing at the end of the job, and your IT team or your next contractor will pay for it.

Watch for the situations that need a specialist#

A few project types carry rules a general “we do everything” contractor may not know.

Public works and prevailing wage. If a public agency is paying, the contractor must be registered with the California Department of Industrial Relations (DIR) to bid or work, must pay prevailing wage, and must file certified payroll. Ask for the DIR registration number and verify it on the DIR website. A contractor who does not know what DIR registration is should not be on a public bid list. Our government and public works page covers how we handle it.

Federally funded buildings and cameras. HUD-funded housing, federally funded schools and clinics, and many grant funded projects fall under NDAA Section 889 and 2 CFR 200.216, which prohibit video surveillance equipment from Hikvision, Dahua, Huawei, ZTE and Hytera, including white label cameras built on those platforms. Ask the contractor to name the actual manufacturer of every camera and recorder and to document it in the submittal. The NDAA compliant cameras guide explains how to check.

Occupied buildings. Residents, patients, staff and students in the building change the schedule, the notification requirements, the access rules and the cleanup standard. Ask how the contractor will phase the work and what a resident or tenant notice looks like. The occupied building guide shows what a workable plan includes.

Red flags that show up before award#

What you see	Why it matters
No license number on the proposal, website or truck	California requires the number in all advertising. Its absence is either an oversight or a problem.
A “fully licensed” or “fully insured” claim with no number or certificate	A claim is not a document. Ask for the license number and the certificates.
Fire alarm or alarm monitoring listed under a C-7 license alone	Fire alarm is excluded from C-7. Alarm monitoring needs a BSIS license. Ask what other license covers it.
Testing or labeling not mentioned	It will not happen unless it is in writing.
Cannot name the camera manufacturer on a federally funded job	NDAA compliance requires knowing the actual OEM behind the brand on the box.
No DIR registration on public work	The contractor cannot legally be paid on the project.
Vague about who performs the labor	Brokered labor is legal but you should know it going in.
Significantly below every other bid	Something is missing. Find out what before you sign.

None of these is automatically disqualifying, but every one of them deserves a direct question and a written answer.

Questions to ask on the first call#

Ask these before you compare numbers:

1. What is your license number and classification? (Then look it up.)
2. Are the technicians on this job your employees?
3. Have you done this scope in this building type? Can I call two of those owners or GCs?
4. What is excluded from your proposal, and who handles those items?
5. Do you certify every cable and deliver the results?
6. What does your closeout package include?
7. Are you registered with DIR? (Public work only.)
8. Which camera and recorder manufacturers do you propose, and are they NDAA compliant? (Federally funded work only.)
9. Who is my point of contact from bid through closeout?
10. How do you handle work in an occupied building?

A contractor who has done this work before will have documentary answers to all ten.

Next step#

If you are putting together a bid list for a commercial or institutional project in California, we would like to be on it. Send the drawings and spec sections through the request a bid page, or ask for the prequalification packet on the for general contractors page and check everything in this guide against it.