Hiring Guide
How to Choose a Professional Network Cabling Company in Glendale, CA
The cabling in your walls will likely outlast your switches, computers, and access points by years, so the company that installs it matters. Here’s what to look for in a Glendale network cabling contractor, the questions to ask, how to compare quotes, and the red flags to avoid.
Why the Contractor Matters as Much as the Cable
Two companies can install the same Cat6A cable and deliver very different results. One leaves a clean, tested, labeled system that runs reliably for 15 years. The other leaves unsupported bundles on ceiling tiles, sloppy terminations, and no records, and the problems show up months later as slow connections, dropped calls, and failed inspections.
At Network Cabling Company Glendale, we believe businesses should know exactly what separates a professional installation from a quick one. The checklist below applies to any contractor you consider, including us.
1. Verify Licensing and Insurance
In California, low-voltage cabling work is generally performed by contractors holding a C-7 Low Voltage Systems license or a C-10 Electrical license from the Contractors State License Board (CSLB). Ask for the license number and look it up on the CSLB website to confirm it’s active and in good standing.
Insurance matters just as much. Most Glendale commercial landlords require contractors to provide certificates of insurance before they can work in the building. A professional contractor carries general liability and workers’ compensation coverage and can provide certificates naming your landlord when required.
Ask for proof of
- An active California contractor’s license.
- General liability insurance.
- Workers’ compensation coverage.
- Certificates of insurance for your landlord.
- Any manufacturer installer certifications.
2. Look for Commercial Experience
Commercial cabling is different from residential work. It involves building rules, fire codes, plenum and riser cable, firestopping, telecom rooms, and coordination with general contractors and other trades. Look for a company that regularly works in buildings like yours.
In Glendale, that might mean experience with Brand Boulevard and downtown office towers, where after-hours work, freight elevator bookings, and landlord approvals are routine. It could also mean older low-rise buildings along Central Avenue and San Fernando Road, with crowded ceilings and years of abandoned cable, or medical offices, studios, retail centers, and warehouses with their own specific needs.
Credentials worth asking about
Industry credentials show a commitment to doing the work to standard. BICSI, the professional association for cabling and IT infrastructure, offers installer and designer credentials, including the RCDD (Registered Communications Distribution Designer). Many cabling manufacturers also certify installers, which can make your project eligible for extended system warranties.
3. Expect a Site Walk and a Written Scope
A professional contractor won’t price a commercial project from a phone call or a floor plan alone. A site walk lets them see your ceilings, walls, pathways, and telecom room, count drops accurately, and learn the building’s rules. The result should be a detailed written scope, not a single lump-sum number.
| Item | What to look for |
|---|---|
| Drop count | The number of drops, by location and type |
| Cable category | Cat6, Cat6A, or fiber specified for each type of run |
| Components | Jacks, patch panels, racks, and cable managers rated to match |
| Pathways | J-hooks, tray, conduit, and firestopping |
| Code compliance | Plenum or riser cable where required, and abandoned cable removal |
| Testing | Certification of every run, with reports provided |
| Labeling and documentation | Labels to TIA-606 and as-built records |
| Schedule | Start date, work hours, and any after-hours requirements |
| Warranty | Workmanship warranty and any manufacturer system warranty |
4. Insist on Testing, Labeling, and Documentation
These three items are what separate professional cabling from simply running wire, and they’re the first things low-cost quotes tend to drop.
Certification testing
Every copper run should be certified with a field tester against its category, and every fiber link tested for loss. Ask to see a sample test report, and make sure reports for your project will be delivered at handoff.
Labeling
Every outlet, cable, and patch-panel port should be labeled using a consistent scheme, ideally following TIA-606. Labels save your IT team hours every time something changes.
As-built documentation
You should receive records showing where each run goes, from outlet to patch-panel port. This is invaluable for future moves, troubleshooting, and the next remodel.
5. Questions to Ask Before You Hire
- What is your California contractor’s license number? Verify it with the CSLB.
- Can you provide certificates of insurance for my building? Confirm they meet your landlord’s requirements.
- Have you worked in buildings like mine? Ask for examples and references from similar projects.
- Will you do a site walk before quoting? A professional quote depends on seeing the space.
- Which cable will you use for each run, and why? They should explain their choices clearly.
- Will every run be certified, and will I get the reports? The answer should be yes.
- How will everything be labeled and documented? Ask for a sample of their labeling and records.
- Who will do the work? Find out whether the crew is in-house or subcontracted.
- How will you work around our schedule and building rules? Especially important in occupied offices and towers.
- What warranty do you offer? Ask about both workmanship and manufacturer system warranties.
6. Compare Quotes Fairly
When quotes vary widely, the difference is usually in what’s included. A low bid may leave out testing, pathway support, firestopping, labeling, or documentation, then add them back as change orders. Ask every contractor to quote the same drop count, cable categories, and deliverables, and compare line by line.
| Item | Professional quote | Typical low-cost quote |
|---|---|---|
| Site walk | Included before pricing | Priced from a phone call or floor plan |
| Scope detail | Line items for drops, cable, pathways, and deliverables | A single lump-sum price |
| Cable support | J-hooks or tray | Not mentioned |
| Testing | Certification of every run, with reports | Basic continuity or none |
| Labeling and records | Included | Optional extra or missing |
| Code items | Plenum cable, firestopping, abandoned cable removal | Not addressed |
| Warranty | Written workmanship warranty, often with a manufacturer warranty | Verbal or none |
Red Flags to Watch For
- No license number, or a license that doesn’t check out.
- Unable or unwilling to provide certificates of insurance.
- A price given without seeing the space.
- No mention of testing, or testing offered only as an extra.
- Vague answers about cable categories or components.
- No labeling or documentation in the scope.
- Pressure to sign quickly or pay most of the cost upfront.
- No references from similar commercial projects.
Know the Basics Before You Talk to Contractors
The more you understand about how cabling works, the easier it is to evaluate proposals, ask the right questions, and spot a quote that cuts corners. You don’t need to be an expert, but knowing the difference between a cable run and a structured system, or why testing and labeling matter, goes a long way.
If you’re just getting started, our guide on what network cabling is and why it’s important for Glendale businesses covers the essentials in plain language.
Frequently Asked Questions
What license does a network cabling contractor need in California?
Low-voltage cabling work in California is generally performed by contractors with a C-7 Low Voltage Systems license or a C-10 Electrical license. You can verify any license on the Contractors State License Board website.
Should I choose the lowest cabling quote?
Not without comparing what’s included. Low quotes often leave out testing, pathway support, labeling, documentation, or code items, which can cost more later.
What certifications should a cabling company have?
Beyond a valid license and insurance, look for BICSI credentials such as the RCDD and manufacturer installer certifications, which can qualify your project for extended warranties.
Should a cabling contractor visit the site before quoting?
Yes. For commercial projects, a site walk is essential to count drops accurately, check pathways and access, and learn the building’s rules.
What should I receive when the job is finished?
Certification test reports for every run, labels on every outlet, cable, and patch-panel port, as-built documentation, and warranty paperwork.
Can a cabling contractor work after hours?
Most commercial cabling contractors can schedule work after hours or on weekends, which is often required in Glendale office buildings and helpful in occupied spaces.
Work With a Cabling Company That Does It Right
We’ll walk your Glendale space, answer every question on this list, and give you a detailed written scope with certification testing, labeling, and documentation included on every run.
Call (424) 203-4572 or request a site walk online.
Request a site walk