Wi-Fi Site Surveys London

What is a wireless site survey?

A Wi-Fi site survey, or wireless site survey, measures and models wireless coverage, interference and capacity across your premises. It identifies dead zones and performance bottlenecks, then recommends access point locations, channel plans and configuration changes so the network meets your coverage, speed and device requirements.

Most ACCL surveys include floor-by-floor heatmaps, interference and channel congestion analysis, capacity planning for high-density areas such as meeting rooms, classrooms and auditoriums, recommended access point locations with mounting and backhaul requirements, and a prioritised optimisation plan. For a longer explanation, read how Wi-Fi site surveys work.

When to book a Wi-Fi survey

A survey is usually the fastest route to the right fix when:

• You have Wi-Fi black spots or dead zones.
• Performance drops at peak times in busy offices, classrooms or events.
• Video calls stutter or drop in certain rooms.
• Roaming is unreliable and users disconnect when they move.
• You are moving office, refurbishing, fitting out or expanding.
• You are adding systems such as CCTV, access control, IoT or VoIP that increase wireless demand.
• You are planning a Wi-Fi 6, 6E or 7 upgrade and want to avoid overspending.

Why a survey beats guesswork

A survey is the difference between ‘buy more access points’ and ‘engineer the right network for this building’. It makes the network ready for IoT devices such as cameras, sensors, printers and access control without hurting staff performance. It gives you a design that scales as headcount, devices and floor plans change. It maps how concrete, metal, glass and dense partitions kill RF performance, so coverage is consistent. It plans for several devices per person, laptops, phones and tablets alike. And it highlights weak points and misconfigurations, supporting better segmentation and a stronger wireless security posture.

Wi-Fi coverage surveys and heatmaps

Heatmaps are colour-coded coverage maps that show signal quality by area and floor. They make the problem visible: where signal is weak, where access points overlap and interfere, and where coverage leaks outside the building. Combined with how people move through the space, they show where smooth roaming matters most. They are also the baseline for checking any fix.

RF interference and channel planning

Interference from neighbouring networks, building services and too many access points on the same channels is one of the most common causes of slow Wi-Fi. A passive survey maps the RF environment without loading the network; channel planning, power settings and placement then reduce the interference. Where legacy devices crowd the 2.4 GHz band, moving capable devices to 5 GHz or 6 GHz frees it up.

Planning for Wi-Fi 6E and Wi-Fi 7

We plan around coverage and capacity targets first, then recommend the most cost-effective standard and hardware for your use case, including 6 GHz where your devices support it. A survey before an upgrade stops you buying more access points, or a newer standard, than the building needs.

Outdoor Wi-Fi coverage

Outdoor spaces bring their own challenges: interference, mounting, weather exposure and distance. If your business needs Wi-Fi in a yard, on a terrace, in loading bays or in external guest spaces, we include it in the survey from day one, with secure backhaul planned to each outdoor access point.

Backhaul, cabling and PoE

Wi-Fi is only as good as the cabling behind it. Every access point needs a data link and, usually, Power over Ethernet from the switch. The survey checks cabling, PoE budgets, switching and uplinks, because a backhaul bottleneck can limit Wi-Fi however well the access points are placed. If you need a survey of your wired network or premises cabling too, book a free site survey and we will cover both.

How to prepare for the survey

To make the survey faster and the recommendations more accurate, it helps to have:

• Floor plans, if available, and any recent layout changes.
• A list of problem areas: rooms, floors and times of day.
• Approximate device counts for staff, guests and IoT.
• Any network constraints, such as cabling, comms rooms or PoE limits.
• Access requirements for secure areas or out-of-hours working.

After the survey: putting it right

If you want ACCL to deliver the remediation end to end, we can install and configure access points, including secure guest networks; provide structured cabling to each access point, often with PoE; optimise controller settings, channel plans and roaming; carry out post-install validation testing; and provide ongoing support and maintenance options. See our Wi-Fi survey and optimisation services, Wi-Fi installation and Wi-Fi for offices and corporate workplaces, schools and colleges, banks and financial institutions and other industries.

What affects the cost of a Wi-Fi site survey

Wi-Fi surveys are scoped to the site. Typical cost drivers are building size, number of floors and layout complexity; whether you need predictive design, on-site testing or both; density and performance requirements, for example events, education or hospitality; whether outdoor areas are included; and reporting depth, from an executive summary to a full technical annex.