What Is a Site Survey? A Plain-English Guide A site survey is a structured visit to a building or site to record what is actually there, rather than what the drawings say should be there. It is the step that turns assumptions into a record: the rooms as they really are, the equipment actually installed, the condition of what you find, and the evidence to prove it. Almost every trade runs them under a different name. A contractor calls it a pre-start condition survey, a facilities manager calls it a condition or compliance inspection, an AV integrator calls it a site visit, a surveyor calls it a building survey. The vocabulary changes; the job does not.
Why Site Surveys Are Done
A survey exists to answer questions that somebody later has to act on, and the cost of getting it wrong is rarely paid by the person who did the survey.
- Quoting and specification. You cannot price work accurately against a floor plan that was drawn five years ago and has been altered twice since.
- Evidence and liability. A dated photograph of a wall before you started is the difference between a dispute and a closed conversation.
- Compliance and audit. Inspections that recur on a cycle only have value if this visit can be compared with the last one.
- Handover. The record you build during the work is usually the record the client receives at the end of it.
What Gets Recorded
The detail differs by trade, but almost every survey captures some combination of:
- The spaces themselves, ideally mapped against a floor plan so every finding has a location
- Condition and observations, including anything that needs attention
- Measurements taken on site
- Equipment and assets, with their identifiers, serial numbers and readings
- Photographic evidence, marked up where a photograph alone is ambiguous
- Who attended, when, and what they signed off
The common failure is not missing information. It is information that gets separated from its context. A folder of photographs named IMG_4471 is not evidence of anything if nobody can say which room it came from.
Types of Site Survey
The same underlying structure covers a wide range of work:
- Condition and building surveys, recording the state of a property room by room
- Pre-start and dilapidation surveys, establishing a baseline before work begins
- Asset and equipment registers, building an inventory of what is installed
- Commissioning and testing records, proving equipment works as specified
- Safety and compliance inspections, run on a recurring cycle
- Snagging and punch lists, capturing defects before handover
If you want the mechanics of each, the site survey software overview walks through how one record can serve all of them.
Who Carries Them Out
Usually the person who will be held to the result: an engineer, a site manager, a surveyor, a facilities or compliance lead. That matters more than it sounds. Surveys are often completed by whoever is on site that day, which is exactly why a repeatable form beats a blank notebook. Two crews surveying the same substation type should not come back with different details in different formats.
Paper, Phone and the Evening Write-Up
The traditional method is a clipboard, a camera and an evening spent rebuilding the visit into a report. It works, but it has a structural weakness: everything captured on site has to survive a journey through somebody memory before it becomes useful, and detail is lost at every handover. The alternative is to capture the record in its final structure while standing in front of the thing being described. Photographs attach to the space rather than the camera roll. Answers go into the form for that asset type. Notes can be spoken rather than typed, which is the difference between a full observation and three words scribbled in the rain. The practical test is simple: when the walk is finished, is the report finished too, or does the real work start when you get back to the van?
What a Good Survey Output Looks Like
- Every finding has a location you could walk someone to
- Every claim has evidence attached to it
- The format is the same as last time, so the two can be compared
- It can be handed to somebody else without a covering explanation
- It was produced from the survey, not rewritten from it
Where to Go Next
If you are choosing how to run surveys rather than what a survey is, the practical guide is how to do a site survey, which covers preparation, the on-site sequence and a checklist you can work from. For the inspection case specifically, where a defined set of checks recurs on a cycle, see the site inspection app page.