Professional network cabling company — When you should hire one

If you need reliable, tested Ethernet and phone infrastructure, hire a professional network cabling company to install standards-grade Cat6a for 10 Gbps links and provide certification testing and warranties such as a 25-year manufacturer warranty on cabling components.

When to call a professional network cabling company

Call a professional cabling firm when you’re installing new layouts, replacing ageing wiring, or upgrading to modern services like VoIP and Wi‑Fi that demand predictable performance. Businesses with 10–200 staff often underestimate how much disruption and rework can come from a rushed install: loose terminations, incorrect cable routes and unlabelled patch panels all add hours of downtime and extra cost.

If you are adding more than one network point per meeting room or moving staff between floors, get a pro. A trained team will survey the space, create a cabling plan that matches your switch and patching strategy, and provide a written test record (fluke-style certification) so you know each link meets the required performance.

What a professional company should deliver (and what they won’t gloss over)

A professional contractor will deliver clear documentation, change‑control for floorworks, and formal test results for every permanent link. Expect them to specify cable category (Cat6 or Cat6a), containment routes, labelling schemes and a realistic schedule that fits your business hours. Ask for a written warranty covering workmanship and components.

In our experience, VoIP handsets running on Power-over-Ethernet with a legacy switch fabric are the number-one root cause of “office phones sound crackly since we redecorated” tickets. Almost always the cabling is fine — the older switch has simply run out of PoE budget or QoS headroom. A professional installer will check the active network as well as the cabling and advise whether the issue is a switch upgrade, PoE midspans, or simple reconfiguration.

Certification testing: per-link test reports that show cable length, pair balance and attenuation.
Labelled terminations: clear labelling at both ends and an updated rack elevation diagram.
Future-proofing: spare ducts, extra patch ports and pathways sized for later expansion.

How to choose a company and what to expect on price and timescale

Choose firms that provide site surveys, written quotations and example test reports. Get at least two written quotes and compare like-for-like: some low bids omit testing or use unbranded patching. Check that installers follow British Standards for installation practice and that the materials carry manufacturer warranties.

Price and timescale expectations: for a typical single-floor 20‑desk office, expect installation and certification to take around 1–3 days and to budget in the low thousands; large multi-floor projects scale from there. Avoid bids that promise a next-day install without a survey — you’ll risk cable routes that block future access or fail building regulations.

When you’re vetting suppliers, look for these practical signals: itemised test reports, containment strategy drawings, and a clear handover that includes labelling and a migration plan for live services. For help understanding security implications of on‑premise network equipment and services, consult the NCSC’s guidance on cyber security.

Finally, make sure the company will coordinate with other trades and work to business hours where feasible. If you want a single place to start the conversation about scope and costs, our networking, wireless and data cabling services page explains typical packages and what we include on a site survey.

When to ask for help

If you’re planning a refit, moving into new premises, or hearing intermittent voice or Wi‑Fi problems, book a professional survey before you sign any fit-out contract. A short site survey reduces surprises, gives you a firm quote, and usually saves time and money during the build. Ask for a written defect period and test results at handover so you can prove performance if problems appear.

FAQ

How long does a typical office cabling job take for about 20 desks?

For a single-floor 20-desk office expect an install and certification window of around 1–3 days, depending on access and whether trunking or ceiling work is required.

Will a professional installer replace my old switch as part of a cabling job?

Not automatically — switch replacement is a separate scope. A reputable cabling company will test the cabling and advise if your switches lack PoE or QoS headroom and provide a quote to upgrade active kit.

Do I need Cat6a or is Cat6 enough?

Choose Cat6a if you want guaranteed 10 Gbps at 100m and better alien‑crosstalk performance in office environments; Cat6 is usually fine for 1 Gbps and shorter runs.

How much should I expect to pay for certification and warranty on a small office install?

Budget for certification and a manufacturer-backed component warranty as part of the job; for a straightforward 20-desk single-floor install this typically adds a few hundred pounds to the installation cost.