Most unreliable office Wi-Fi traces back to the same root cause: access points placed wherever was convenient, not where a proper survey would have put them. A site survey replaces guesswork with actual measurement, before any hardware goes on the wall.
Why Guessing Doesn't Work
Wi-Fi signal doesn't travel through a building predictably - concrete, metal framing, and even furniture density all affect coverage in ways that aren't obvious from a floor plan alone. Placing access points based on "that looks about central" routinely leaves coverage gaps that only become apparent once staff start using the space.
Step 1: Review the Floor Plan and Use Case
Before anyone sets foot on site, the survey starts with understanding how the space is actually used - desk density, meeting rooms, any areas with heavy simultaneous device use (a training room, for example), and any known problem areas from previous experience.
Step 2: Predictive Modelling
Using the floor plan and building material information, survey software generates a predicted coverage map, factoring in wall types and likely signal loss. This gives a starting point for access point placement before physical testing begins.
Step 3: On-Site Signal Testing
A technician walks the space with a temporary access point and survey equipment, measuring actual signal strength, interference from neighbouring networks, and real-world coverage at various points - not just the theoretical prediction, but what's actually happening in that specific building.
Step 4: Identify Access Point Placement
Based on the measured data, the survey determines how many access points are needed and exactly where, balancing coverage, capacity (how many devices will connect to each one), and practical mounting locations - power availability, cable runs, and physical accessibility for maintenance.
Step 5: Channel and Capacity Planning
The survey also plans which Wi-Fi channels each access point should use to minimise interference between them, and confirms the equipment chosen can handle expected device density, particularly in higher-use areas like meeting rooms.
Step 6: Report and Recommendation
The output is a coverage map showing predicted signal strength throughout the space, a specific access point placement plan, and equipment recommendations - a concrete document to work from, not a verbal best guess.
What Happens After the Survey
Once placement is confirmed, cabling and installation proceed based on the plan - see our guide on the network cabling checklist for a new office for how that fits into the broader fitout. If dropouts are already happening in an existing office, a survey is also the right diagnostic step - see our guide on why business Wi-Fi keeps dropping out.
Frequently Asked Questions
Is a site survey necessary for a small office, or only larger spaces?
It matters most for larger or more complex spaces, but even a small office with unusual layout, thick walls, or a history of dropouts benefits from a proper survey rather than guessing access point placement.
How long does a site survey take?
For a typical small-to-medium office, a couple of hours on site is usually enough, plus time afterward to produce the coverage plan and report. Larger or multi-floor spaces take longer.
Should a survey be done before or after the office is furnished?
Ideally after furniture and major fixtures are in place, or at minimum with a realistic layout plan, since furniture, partitions, and even stock in a warehouse can affect signal in ways an empty-room survey won't capture accurately.
Does a site survey account for future changes, like adding staff or moving walls?
A good survey builds in reasonable headroom for growth, but a significant future change (a big headcount increase, a major layout change) generally warrants a follow-up survey rather than assuming the original plan still holds.
We run proper Wi-Fi site surveys for Perth offices before any access point goes on the wall, so coverage is measured, not guessed.
Network Setup Services →Planning new Wi-Fi coverage, or fixing existing dropouts?
Call 0433 087 091 - we'll run a proper site survey for your space, no obligation.
Get a Free Wi-Fi AssessmentFor related reading, see our guides to business Wi-Fi design and why business Wi-Fi keeps dropping out.