If there’s one thing that still catches teams out early on a project, it’s what they assume is happening below ground.
On paper, a site can look straightforward. Clear access, familiar surroundings, nothing immediately suggesting complexity. But underground utilities rarely respect what a site “looks like” and that gap between assumption and reality is where problems tend to start.
According to industry estimates reported by the HSE, approximately 60,000 accidental cable and pipe strikes occur every year in the UK, with a total cost of around £2.4 billion annually when you factor in repair costs, project delays, service disruption, and wider economic impact. That number alone should reframe how utility searches are viewed.
Over time, we’ve noticed the same misconceptions cropping up across different types of projects, from small residential schemes to larger commercial developments. Here are 7 of the most common.
1. “There can’t be that much underground infrastructure here”
This one usually comes from visual judgement. If a site doesn’t look heavily built up, it’s easy to assume there won’t be much beneath the surface.
But utilities don’t follow visual logic. They follow demand, history, and incremental development over decades. Even relatively modest sites can contain electricity, water, drainage, telecoms, and legacy services that have been altered, extended, or abandoned over time and not all of it is cleanly recorded.
Assuming low complexity based on appearance alone is rarely a safe bet.
2. “Statutory records will show us everything we need”
Statutory utility records are essential, but they have real limitations.
They show recorded positions of known apparatus but they are not guaranteed to reflect exact locations, depths, or current site conditions. Records can be incomplete, outdated, or inconsistent between providers.
They’re best treated as a baseline, not a definitive site model. The HSE’s own guidance, HSG47 makes this clear, recommending that plans alone are not sufficient and that a structured utility search should be conducted before any excavation begins.
3. “We’ll deal with utilities if we come across them”
This is one of the most expensive approaches in practice and potentially one of the most dangerous.
The Energy Networks Association has reported that an average of 70 people per year suffer serious injuries from contact with underground electricity cables in the UK alone and that figure only covers electrical cables. It excludes gas main ruptures, water main failures, and telecoms damage.
Beyond safety, discovering a utility mid-excavation changes the entire flow of a project. Once you’re on site, options narrow quickly. Delays, redesign, and diversion work all cost far more than a search commissioned before work began.
4. “Utility searches are only needed for large or complex projects”
There’s a misconception that utility searches are reserved for major infrastructure schemes.
In reality, any project involving groundworks carries risk. Small-scale works often have less flexibility built into design and programme, meaning there’s less room to absorb surprises. Extensions, service connections, and minor excavations can all be affected by unexpected underground infrastructure.
The principle doesn’t change with project size. The ground still contains what it contains.
5. “Private land means fewer underground risks”
Private land can create a false sense of security.
While it may avoid some of the density found in highways or urban areas, it introduces its own complications. Privately managed or poorly documented services, shared supply runs, historic connections, and infrastructure installed without formal coordination with statutory records are all common on private land.
Crucially, local and private connections are not recorded on any publicly available plans, which makes them significantly harder to predict than public networks. However, those private connections will ultimately run to the mains, and obtaining mains plans is always a worthwhile starting point to understand where services are likely to be heading.
For anything beyond that, GPR scanning and safe hand digging are essential. There is no substitute when it comes to confirming what is actually in the ground.
6. “We can rely on experience and site intuition”
Experience absolutely has value. Most seasoned engineers and contractors develop a strong instinct for what might be present.
But intuition alone doesn’t replace verified data. HSG47 is clear that responsibility applies across the entire chain, covering clients, designers, principal contractors, and operatives, not just the person operating the excavator. Relying solely on judgement increases the chance of missing less obvious or poorly recorded services.
It is also worth noting that CDM Regulations 2015, Regulation 25(4) creates a specific legal duty: no construction work shall be carried out in proximity to any underground service unless suitable and sufficient steps have been taken to prevent risk of injury. Intuition is not a suitable and sufficient step.
7. “Utility searches are just an unnecessary upfront cost”
This is probably the most persistent misconception.
The UK construction market is estimated to exceed £390 billion in 2026, with utilities and infrastructure work among the primary growth drivers. Projects are getting busier, timelines tighter, and margins thinner. In that environment, avoidable delays are especially damaging.
Compared to the potential cost of a utility strike, which can include repair bills, programme overruns, HSE investigation, and reputational damage, a desktop utility search is a modest and sensible investment. Its value lies in reducing uncertainty at the point where it matters most: before work begins.
Frequently Asked Questions
Is a utility search a legal requirement? While a utility search is not a standalone legal requirement, CDM Regulations 2015 and HSG47 create a clear duty to identify underground services before excavation begins. Failure to do so leaves teams legally exposed and significantly weakens any defence in the event of an incident.
How much does a utility search cost? At Cornerstone Projects, searches start from £58 + VAT, with instant online quotes available 24/7.
What is an underground utility map? An underground utility map is a consolidated report showing the known positions of buried services beneath a site, including electricity cables, gas mains, water pipes, sewer networks, and telecoms. It is produced using statutory records gathered from utility providers and presented in a single, usable format.
How long does a utility search take? With Cornerstone Projects, the ordering process takes less than 5 minutes. Everything is handled online with no phone calls or paperwork required.
How Cornerstone Projects can help
At Cornerstone Projects, we provide accurate, comprehensive underground utility searches to support safe and informed decision-making before any ground is broken.
We contact utility providers and collate statutory records on your behalf, producing a consolidated desktop report covering electric cables, gas mains, water infrastructure, sewer networks, and telecoms, all in a single, usable format.
With 105,000+ completed searches and 21 years of experience, we’re trusted by construction professionals, engineers, architects, and developers across the UK.
Get an instant quote, searches from £58 + VAT
Brought in to help take the business to the next level! His role is to improve lead generation and customer satisfaction from over 8,500 registered clients. Jim loves interacting with potential and existing clients and has a wealth of marketing and sales experience through his previous roles at O2, the RAC and TalkTalk. Jim holds a BA (Hons) Business Studies degree majoring in Marketing. A season ticket holder at Liverpool FC and a keen golfer, Jim also loves the gym!