Planning network cabling before you move into a new office space is the single decision that determines whether your phones, WiFi, security cameras, and workstations run clean for the next 10 years or turn into a service ticket every quarter.

Why this matters

A new office buildout gives you one clean shot at running cable before the walls close. Miss a drop location in 2026 and you're either running exposed conduit later or living with a WiFi dead zone in the conference room for the life of the lease.

Structured cabling isn't just data and phones anymore. IP security cameras, door access control readers, and wireless access points all pull power and data over the same Cat6 or Cat6a runs through Power over Ethernet. Planning cabling and planning your camera placement plan should happen in the same conversation, not two separate projects six months apart.

DBSI has been installing business phone systems, network cabling, and security systems for small and mid-sized New Jersey offices for over 15 years. The pattern is consistent: offices that plan cabling before move-in spend less over the life of the space than offices that patch it in after the fact.

What you'll need

• Floor plan with furniture layout — desk positions, conference rooms, break rooms, and where the server rack or network closet will sit
• Headcount and growth estimate — plan drops for the team you'll have in 3 years, not just the team moving in this month
• Device inventory — phones, workstations, wireless access points, printers, POS terminals, IP cameras, door readers
• Landlord or building rules — some multi-tenant buildings restrict where cable can run through shared risers or ceilings
• Budget for both cable and termination — the cable itself is cheap; labor, patch panels, and testing are where cost adds up
• A licensed low-voltage contractor — not the general contractor's electrician, someone who does structured cabling specifically

The steps

1. Walk the space before anything is built out

Walk the raw space with the floor plan in hand and mark every desk, every door that needs access control, every corner that needs camera coverage, and every spot a wireless access point will hang from the ceiling. This is the moment to catch problems for free — after drywall goes up, every change is a change order.

Common mistake: relying on the architect's electrical plan alone. Electrical plans show outlets, not data drops, and the two rarely line up where you actually need them.

2. Choose your cable grade — Cat6 vs Cat6a

Cat6 handles gigabit speeds cleanly and supports 10 Gigabit Ethernet up to about 55 meters. Cat6a holds 10GbE performance out to the full 100-meter maximum run length defined by the TIA/EIA-568 standard.

For most small and mid-sized offices in 2026, Cat6 is enough for desktops, phones, and access points. Choose Cat6a for the server room uplink, any run near 80 meters or more, and any building where you expect to add 10GbE gear within the next 5 years.

3. Plan two drops per workstation, not one

One drop per desk was standard a decade ago. In 2026, plan for two: one for the workstation, one for a VoIP phone, a docking station, or future redundancy. Adding a second drop during rough-in costs a fraction of running it after the office is occupied.

Expected outcome: no employee ever has to daisy-chain a switch under their desk because IT ran out of ports.

4. Map camera and access control runs into the same plan

Every IP camera and every door reader needs a cable run back to a switch, almost always Power over Ethernet so you're not also running separate power. Mark camera positions at entrances, parking areas, and stockrooms alongside your data drops, and mark door hardware at every exterior door and any interior door that needs restricted access.

Offices that skip this step end up hiring a second contractor to fish cable through finished walls for installing cameras in an existing building months after move-in — a job that's straightforward during buildout and disruptive afterward. The same logic applies to access control systems for small offices: plan the reader locations now, wire them now.

5. Size and place the network closet or rack

Every cable run terminates somewhere. That spot needs ventilation, a dedicated electrical circuit, and enough physical space for a patch panel, switches, and — if you're running a phone system — a PBX or gateway. Undersized closets are the top reason offices outgrow their cabling within 2 years of move-in.

Rule of thumb: leave 25% more rack space than your day-one equipment needs. You will add a switch, a UPS, or a wireless controller before the lease is up.

6. Label, document, and test every run

Every cable gets a label at both ends before the walls close, matched to a patch panel diagram you keep on file. Once cabling is in, every run gets tested for continuity, length, and speed certification — not just plugged in and eyeballed.

Common mistake: skipping documentation because "we'll remember which cable goes where." Nobody remembers eighteen months later, and the next technician who touches the closet starts from zero.

Troubleshooting

• WiFi dead zones after move-in — usually means access points were placed based on the ceiling grid instead of a signal survey; add a drop and remount the AP where coverage actually needs it.
• Phones dropping calls or cutting out — check for Cat5 runs mixed into a Cat6 network, or runs exceeding the 100-meter limit without a repeater.
• Cameras going offline intermittently — almost always a PoE budget issue: too many cameras pulling power through one switch rated below their combined draw.
• New hire has no port at their desk — this is the single-drop mistake; retrofit costs multiply once furniture and carpet are in.
• Landlord won't allow ceiling access for cable runs — get this in writing during lease negotiation, not after the contractor shows up.
• Access control reader shows no signal — check the run length and confirm the door hardware was included in the original cabling map, not added afterward.

Tools and resources

• Cable certification tester for verifying speed and continuity on every run
• Patch panel and rack diagram template, kept current every time a change is made
• A structured cabling contractor familiar with installing access control in an existing office if you're phasing in security after the initial buildout
• PoE switch with enough budget (wattage) for every camera, phone, and access point on that switch, plus 25% headroom

What to do next

Once cabling is planned and roughed in, layer security on top of it rather than treating it as a separate project. If your new space has multiple doors or shared entries, look at keyless entry systems while the cable is still exposed — it's the cheapest point in the whole buildout to add reader wiring.

FAQ

One last thing

The walkthrough before drywall closes is the cheapest hour of the entire buildout — every drop, camera, and reader added after that point costs multiples of what it costs during rough-in.

Related guides

• Keyless entry systems for commercial buildings