Utility survey costs in the UK depend heavily on what kind of survey you need, and the range is wide because a desktop records search and a full on-site detection survey are very different pieces of work. At the entry level, desktop PAS 128 QL-D searches are cheap: Groundwise advertises its desktop utility searches from £100 plus VAT on a standard ten-day turnaround, and Joanna James quotes its PAS 128 desktop reports from £350 plus VAT. On-site detection surveys, where a surveyor attends and locates buried services with radar and electromagnetic equipment, are a different order of cost and are typically charged on a day-rate basis, as The Survey House sets out, because the price reflects the site size, complexity and the confidence level you specify. The honest answer is that there is no single figure, and a fixed quote against a clear brief is far more reliable than any headline rate.
Those figures are third-party prices quoted here for context, not our own rates. What they show is the shape of the market, from a low entry point for a desk study up to a day-rate engagement for a full site survey. Understanding what moves the price lets you brief a survey sensibly and compare quotes on a like-for-like basis.
Desktop search or on-site survey
The single biggest factor in cost is which type of utility survey you are actually buying, and the two ends of the scale answer different questions.
A desktop utility search, classified as PAS 128 QL-D, is a records exercise. The provider gathers statutory plans from the utility companies and compiles them into a single report. It tells you which assets are recorded in the area and roughly where they are, but it involves no site work, so it is quick and comparatively cheap. This is the level priced from around £100 to £350 plus VAT in the examples above.
An on-site detection survey, at PAS 128 QL-B, is where a surveyor physically attends and locates services on the ground using ground penetrating radar and electromagnetic location. This is the level most detailed design and pre-excavation work relies on, and because it involves people, equipment and time on site, it is charged by the day rather than from a fixed catalogue price. Physical verification at QL-A, exposing a service by trial hole or vacuum excavation, adds further cost where absolute certainty is needed.
What drives the price of an on-site survey
For a QL-B detection survey, several factors do most of the work in setting the fee.
| Factor | Effect on cost |
|---|---|
| Site size and extent | Larger areas take more time to survey and draw, so cost rises with extent |
| Quality level required | A higher PAS 128 confidence level, or verification to QL-A, adds scope |
| Site complexity | A congested urban site with dense services takes longer than an open plot |
| Access and traffic management | Live carriageways, permits and restricted hours slow the work and add cost |
| Deliverables | A detailed coded CAD drawing to a specific standard adds drawing-office time |
Site size and complexity
The area to be surveyed and how much is buried beneath it are the biggest drivers of a day-rate survey. A small, open site with a handful of services is quick to cover; a large or heavily serviced site, such as a hospital or industrial estate with a dense network of pipes and cables, takes far longer to survey thoroughly and to draw up. Complexity, not just size, is what fills the days.
Confidence level required
PAS 128 defines quality levels of increasing confidence, and each step up adds work. A QL-D desk study is cheapest. A QL-B detection survey costs more because it involves site work with radar and electromagnetic location. QL-A verification, physically exposing services, is the most expensive because it involves excavation, and it is usually applied selectively to the highest-risk assets rather than the whole site.
Access, traffic management and location
Where the site is and how easy it is to work on both feed into the fee. Surveying in a live carriageway needs traffic management and often permits; restricted access hours, night working or heavy pedestrian traffic all slow the survey down. Travel to a distant site adds cost that a nearby job does not carry.
Deliverables
The output specification matters too. A coded utility drawing delivered in CAD to a specific layering standard, with a full method statement setting out coverage and limitations, is more work than a basic marked-up sketch. The tighter the deliverable, the more drawing-office time it takes.
Why a fixed quote beats a headline rate
A “from” price for a desktop search or a bare day rate for a site survey tells you very little about what your job will actually cost, because neither knows your site. A fixed quote against a clear brief is more useful in every way: you know the number before work starts, the provider has committed to the scope, and you can compare quotes genuinely like for like rather than guessing how many days each firm will take.
To get an accurate quote, give the surveyor as much as you can up front: the site address and approximate area, the PAS 128 quality level you need, any known high-risk services, the access constraints, and the deliverables and CAD standard required. The clearer the brief, the tighter and more reliable the price.
Common questions
How much does a utility survey cost in the UK?
It depends on the type. Desktop PAS 128 QL-D searches are advertised from around £100 to £350 plus VAT by providers such as Groundwise and Joanna James. On-site QL-B detection surveys, where a surveyor locates services with radar and electromagnetic equipment, are charged on a day-rate basis that reflects site size, complexity and access, so a fixed quote against your brief is the reliable figure.
Why is an on-site survey more expensive than a desktop search?
A desktop search compiles existing utility records into a report with no site work, so it is quick and cheap. An on-site detection survey involves a surveyor attending with ground penetrating radar and electromagnetic location, spending time on site and then producing a coded drawing. That is why it is priced by the day rather than from a fixed catalogue rate.
What PAS 128 quality level do I need, and how does it affect cost?
QL-D suits early feasibility and awareness. QL-B, a full on-site detection survey, is the most widely used level for detailed design and pre-excavation work. QL-A verification, physically exposing services, gives the highest confidence and costs the most, so it is usually reserved for high-risk zones. Many projects layer the levels, building confidence where it matters most, which also controls cost.
Can I get a fixed price rather than a day rate?
Often yes. While site surveys are commonly quoted on a day-rate basis, a provider can give a fixed price once the scope is clear: the site area, the quality level, the access constraints and the deliverables. A fixed quote caps the total and lets you compare firms like for like, so it is worth providing a full brief to get one.
If your project disturbs the ground, the sensible next step is a quote against your actual site rather than a guess from a headline figure. Our utility surveys are scoped to the PAS 128 quality level your works demand, combining radar and electromagnetic detection and delivered as a coded CAD drawing. To choose the right confidence level, see our guide on PAS 128 survey quality levels explained, and for the safe-digging context, our guide on avoiding utility strikes and HSG47.