Every office has a WiFi geography that staff learn by heart: the good corner, the dead meeting room, the spot by the kitchen where video calls go to die. People adapt to it the way they adapt to a sticking door, which is why bad office WiFi survives for years: it is never quite broken enough to fix, just bad enough to tax every hour of the working day. The fix is not a more expensive router or a signal booster from a marketplace listing; it is treating WiFi as a small piece of designed infrastructure, which for a typical office costs less than most businesses expect and removes the geography entirely.
Here is how office WiFi is done properly, and why the common shortcuts produce the offices described above.
Why the router in the corner stops working
The broadband router’s built-in WiFi is designed for a house: one box, modest area, a handful of devices. An office defeats it three ways:
- Physics. Signal falls off with distance and dies against the things offices are made of: masonry walls, metal shelving, fire doors, kitchens full of appliances. One transmitter cannot serve an L-shaped floor or two storeys evenly; no amount of spend on that one box changes this.
- Headcount. WiFi is shared airtime: every laptop, phone, printer and TV screen takes turns. Past roughly ten busy users on a single consumer-grade box, the queue itself becomes the bottleneck, experienced as “the internet is slow” even on a fast connection.
- The booster trap. Plug-in repeaters, the instinctive fix, re-broadcast the signal at half the efficiency and add a hop: they extend coverage while degrading quality, and chaining them compounds it. Boosters are how one problem corner becomes a whole office of mediocre.
The phone system raises the stakes: once calls travel the same network, WiFi quality becomes call quality in every meeting room.
What proper looks like
The professional pattern is the same in a 10-person office and a 200-person one; only the quantities change:
Multiple access points, wired back to the network. Business access points (APs) mount on ceilings or high walls, each cabled back to the network switch, placed so their coverage overlaps slightly. Devices roam between them automatically; the office stops having a geography. Power over Ethernet (PoE) feeds each AP through its network cable, so placement follows coverage, not plug sockets: one cable per AP, run once, and the switch powers the lot.
A survey before anything is bought. A site survey (software-assisted walk-through, checking wall materials, floor plan, neighbouring networks and where people actually sit) turns AP count and placement from guesswork into a drawing. Small offices sometimes skip formal surveys on installer experience; what should never be skipped is the question the survey answers: where does coverage need to be, at what density? Meeting rooms and video-call-heavy desks are density hotspots, not just coverage areas.
Central management. Business APs are managed as one system rather than logged into one by one: one network name everywhere, settings changed once, firmware updated on schedule, and visibility of who is connected where when something misbehaves. This is the layer that makes WiFi supportable as part of managed IT instead of a mystery box.
Separated networks for separated trust. The same APs broadcast multiple networks: staff on the main network, guests on an isolated network that reaches the internet and nothing else, and increasingly a third for the miscellaneous devices (screens, sensors, door systems) that deserve internet but not access to your files. Guest separation is basic network hygiene: visitors’ devices carry unknown risk, and “the WiFi password” written on the meeting-room whiteboard should never be the key to the company network. Modern WPA2/WPA3 encryption on the staff network, a guest network you can share freely, and the password-on-the-whiteboard problem dissolves.
What it costs, honestly
For a typical single-floor SME office: business APs run £80 to £250 each with most offices needing one AP per 75 to 150 square metres depending on walls and density (a 10-to-20-person office is commonly a two-to-three AP job), plus a PoE switch if the current one lacks it (£150 to £500), cabling runs (£50 to £100 per drop), and a half-day to a day of installation. All-in, most small offices land in the £800 to £2,500 range as a one-off, sitting in the projects line of the IT budget and lasting five-plus years. Against the alternative (every member of staff losing minutes daily to the bad corner, and every video call gambling), it is one of the better-value fixes in the building.
Two spending mistakes bracket the range: the marketplace mesh kit that solves a house-shaped problem an office does not have, and the enterprise-grade system quoted at five times the need. The survey is what right-sizes it.
Frequently asked questions
How many access points does an office need?
Rule-of-thumb: one per 75 to 150 square metres, adjusted for wall construction and user density, with meeting rooms treated as density hotspots. A 10-to-20-person single-floor office is typically a two-or-three AP installation; the survey turns the rule of thumb into a placement drawing.
Why is our office WiFi slow even with fast broadband?
Because the bottleneck is airtime, not bandwidth: too many devices sharing too few transmitters, often one consumer router plus boosters. The connection and the WiFi are separate systems; upgrading one does not fix the other, and diagnosing which is at fault is a ten-minute wired-versus-wireless test.
Are WiFi boosters any good for offices?
For offices: no. Repeaters halve efficiency per hop and degrade the whole network’s consistency. Wired-back access points cost more per unit and are the difference between extending bad WiFi and replacing it.
Do we need a guest WiFi network?
Yes, isolated from the company network: visitor devices are unknown risk, and insurer and Cyber Essentials conversations increasingly expect the separation. Modern APs broadcast both networks from the same hardware at no extra cost.
Can we install office WiFi ourselves?
A confident small office can mount and configure a two-AP system; the parts that punish DIY are the survey judgement, the cabling runs, and the network separation configuration. Mis-designed WiFi works badly for years precisely because it half-works; done-once-properly is cheap against that.
What about WiFi 6 and WiFi 7?
Current business APs ship WiFi 6/6E as standard, which handles dense offices markedly better than older generations; WiFi 7 is arriving at a premium most SMEs need not pay yet. The practical rule: buy current-generation standard kit, skip both the bargain last-gen box and the bleeding edge.
Get the geography surveyed out of your office
The free IT health check includes the network: a walk-through of your actual coverage, the wired-versus-wireless bottleneck test, the separation check on your guest arrangements, and a right-sized design with the cost attached. Get in touch and retire the bad corner for good.
