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Wi-Fi Site Survey: What It Is, When You Need One, and How Many Access Points

A Wi-Fi site survey maps how signal and interference behave in your space so access points go where people actually work. It's how you avoid both dead zones and paying for access points you didn't need.

The three kinds of survey

  • Predictive. We model your floor plan, wall materials and expected users in planning software and predict coverage before anything is installed. Good for new buildouts and budgeting.
  • Passive (on-site). An engineer walks the space with measurement tools, recording signal strength and interference from your network and your neighbors'.
  • Active (validation). After installation, we connect and measure real speeds and roaming across the floor to confirm the design works.

How many access points do you need?

There's no single formula, because walls and people matter more than square feet. As a rough starting point for budgeting, an open office often lands around one access point per 2,500 square feet. You'll need more when:

  • Many people meet in one room, such as conference rooms and training spaces.
  • The space has concrete, brick, elevator cores or glass with metal coatings.
  • You're in a dense Manhattan building where neighbors' networks crowd the channels.
  • Every person carries a laptop, a phone and sometimes a tablet.

Planning by capacity, not just coverage, is what keeps video calls stable when the room fills up.

When a survey is worth it

  • You're moving into or building out a new space.
  • Complaints cluster in certain rooms or at certain times of day.
  • You're about to buy new access points and want to know how many and where.
  • You've changed the layout: new walls, more people, a new floor.

What you get at the end

A heat map of coverage, the recommended number and placement of access points, mounting heights, channel and power settings, and a note on what cabling and PoE switch capacity each location needs. If your Wi-Fi is already struggling, start with our guide to why office Wi-Fi is slow.

FAQ

Frequently Asked Questions

A study of how Wi-Fi signal and interference behave in your space, used to decide how many access points you need and where they go.

It depends on walls, layout and how many devices connect at once. A rough budgeting figure is one access point per 2,500 square feet of open office, more in dense or walled spaces.

Predictive is ideal for new buildouts and budgets. On-site surveys measure real conditions, including neighbors' interference, and are best for fixing an existing network.

For a few rooms, an experienced engineer can often place access points without a formal survey. For larger or difficult spaces, a survey saves money and complaints.

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Moving, expanding or tired of dead zones? We'll survey the space and give you a placement plan.

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