PAS 128 Surveys

Breaking ground without knowing what lies beneath is a major risk on any construction site. At Intersect Surveys, we specialise in PAS 128 surveys and ground penetrating radar (GPR) surveys, providing construction teams across the UK with accurate underground utility data before any excavation begins.

Our surveys give you the confidence to plan, dig, and build safely, reducing the risk of surprises beneath the surface.

What is PAS 128?

PAS 128 is the UK standard for locating, mapping, and reporting underground utilities. Developed by the British Standards Institution (BSI), it provides a consistent framework for utility detection on construction and infrastructure projects. The specification ensures that surveys are reliable, accurate, and fit for purpose, allowing contractors, engineers, and project managers to make informed decisions before work starts.

A PAS 128 survey typically combines:

  • Desktop studies of existing utility records and plans
  • Detection surveys using GPR and electromagnetic locators
  • Verification surveys through potholing or trial holes

By following PAS 128, UK construction teams can reduce utility strikes, improve safety, and comply with regulatory standards.

pas 128 survey at hever castle

PAS 128 & GPR Surveys for Safe, Accurate Underground Utility Detection

Protect your construction project from costly delays and hazards with expert PAS 128-compliant surveys and advanced GPR technology across the UK.

Why PAS 128 Surveys Are Essential for Construction

Underground services and hidden structures are a common cause of delays and accidents on UK construction sites. PAS 128 surveys help to identify these hazards early, offering several key benefits:

Enhanced safety: Avoid utility strikes that could result in injury or fatality.

Cost control: Minimise expensive repairs, legal claims, and compensation costs.

Project efficiency: Keep your site on schedule by avoiding unexpected obstacles.

Accurate planning: Engineers and contractors can design works around verified utility locations.

With Intersect Surveys, you gain reliable data that is ready to use, ensuring your project is safer and more predictable from the outset.

Applications for PAS 128 Surveys Across Industries

How We Conduct PAS 128 Surveys

At Intersect Surveys, we combine PAS 128 compliance with specialist GPR expertise to deliver surveys that meet the highest industry standards.

Ground Penetrating Radar (GPR) – Our Core Speciality

GPR surveys are a non-intrusive method for detecting underground utilities and subsurface features. By sending radar pulses into the ground, GPR identifies both metallic and non-metallic services, voids, ducts, and reinforced structures. With GPR, we can:

  • Map underground utilities with centimetre-level accuracy
  • Detect voids, pipes, ducts, and hidden obstacles before excavation
  • Deliver data in CAD or GIS formats that integrate directly into your project plans 

Our GPR surveys are fast, non-disruptive, and highly accurate, allowing your construction team to continue work safely while we collect critical data.
Intersect Surveys Conducting PAS 128 GPS Surveys

Benefits of Choosing Intersect Surveys for PAS 128

  • Reduced risk of utility strikes: Protect your team and project budget.

  • Minimal disruption: Non-intrusive GPR surveys mean no trial trenches are required unless verification is necessary.

  • Actionable results: Surveys delivered as CAD drawings and annotated reports ready for immediate use.

  • Regulatory compliance: Our surveys meet PAS 128 standards and support health and safety obligations

  • We provide practical insights, not just raw data. Every report includes clear visualisation and recommendations so project managers can make confident decisions.
Intersect Surveys mapping utilities with PAS 128 Surveys

Applications Across UK Construction and Infrastructure

PAS 128 and GPR surveys are vital for a wide range of projects, including:

Construction sites: Residential, commercial, and industrial developments.

Highways and railways: Detect buried services, trackbed voids, and weak sub-layers.

Utility upgrades: Accurately map gas, water, electricity, and telecoms before excavation.

Environmental and heritage projects: Conduct surveys in sensitive areas without disturbing the ground.

Our surveys are trusted by contractors, engineers, and site managers to provide reliable subsurface information across the UK.

Mapping utilities at London Underground with PAS 128

Why Work with Intersect Surveys

At Intersect Surveys, we combine PAS 128 compliance with advanced GPR expertise to deliver surveys that are accurate, safe, and practical. Our team of surveyors has extensive experience in UK construction, utilities, and infrastructure projects. We produce reports that are:

  • Clear and actionable with positional data accurate to centimetres
  • CAD and GIS compatible, ready to use in your project planning
  • Compliant with PAS 128 standards, satisfying clients, regulators, and insurers 

Contractors and engineers rely on our surveys to avoid costly mistakes, maintain project schedules, and ensure safety.
PAS 128 utility surveys with intersect surveys

Book a PAS 128 or GPR Survey Today

Don’t risk unexpected underground hazards. Contact Intersect Surveys today to arrange a PAS 128 survey or GPR survey for your construction or infrastructure project.

Gain confidence, reduce risk, and keep your project on schedule with expert surveying services across the UK.

Utility Mapping and Underground Surveys-1

FAQs About GPR Survey Services

How accurate are PAS 128 surveys with GPR for detecting underground utilities in the UK?

+ -
PAS 128 surveys conducted with ground penetrating radar (GPR) can locate underground utilities with centimetre-level accuracy, including metallic and non-metallic pipes, ducts, and voids. Accuracy depends on ground conditions, survey quality level, and survey methodology. At Intersect Surveys, we combine PAS 128 standards with expert GPR surveying techniques to deliver precise, actionable data for UK construction projects.

Can PAS 128 surveys prevent utility strikes during UK construction projects?

+ -
Yes. A PAS 128 survey identifies the location, depth, and type of underground utilities before excavation, helping to prevent accidental utility strikes, which are costly, dangerous, and cause project delays. Using GPR technology, we map hidden services across construction, infrastructure, and utility upgrade sites, reducing the risk of hazards and keeping projects compliant with UK safety regulations.

What is the difference between a PAS 128 QL-B GPR survey and a traditional utility survey?

+ -

A GPR survey under PAS 128 uses ground penetrating radar to detect buried utilities
without excavation, offering higher accuracy and reliability than traditional surveys
that rely solely on historical plans or visual inspections. Unlike standard surveys,
PAS 128-compliant GPR surveys provide position, depth, and type of utility, allowing
construction teams to make informed decisions and avoid project delays.

How do PAS 128 surveys support compliance with UK construction health and safety standards?

+ -
PAS 128 surveys are aligned with UK construction and utility safety regulations, helping contractors and engineers comply with HSG47 guidance and risk management requirements. By identifying underground utilities before work begins, PAS 128 surveys reduce the risk of accidents, support insurer requirements, and provide documented evidence of due diligence on site.

How can PAS 128 surveys with GPR help reduce project delays and costs?

+ -
PAS 128 surveys using GPR technology provide detailed underground utility data that helps construction teams avoid accidental strikes, rework, and unexpected excavations. By identifying hidden pipes, ducts, and voids before breaking ground, our surveys minimise downtime, reduce emergency repair costs, and keep projects on schedule, making them an essential part of UK construction planning and risk management.

A reliable and efficient company

”We've been working with Intersect for several years and have always found them to be reliable, efficient and good value for money. I can honestly recommend them."

testimonial-image

Peter F , Commercial Director

Excellent customer care

”The whole process was very smooth from start to finish, with excellent communication and customer care. We'll definitely be working with Intersect in the future."

testimonial-image

Henry P , Director

Efficient and knowledgeable

”The in-depth knowledge which Intersect Surveys have in their field is second to none. They're efficient, helpful and in my opinion, excellent value. "

testimonial-image

Robert M , Site Manager

What Our
Clients Say

Who We
Work With

News & Blogs

Monitoring in Real-Time: How Live Alerts Reduce Structural and Environmental Risk

Alex Shiels 18 Aug, 2025

On a busy construction site, things can change in an instant. A small shift in a retaining wall, a spike in dust...

Structural vs. Environmental Monitoring: What's the Difference and When Do You Need Both?

Alex Shiels 15 Jul, 2025

Why Environmental Monitoring Can’t Be Ignored As urban development grows more complex, project teams face rising...

Why Environmental Monitoring Is No Longer Optional for Construction Sites

Alex Shiels 14 Jul, 2025

Why Environmental Monitoring Can’t Be Ignored Construction sites today operate in a climate of increased...

Get in touch

Choose Intersect Surveys as your preferred provider. Simply fill out the form and an expert will be in touch to handle your enquiry. We always aim to get back to you within 24 hours.


Indicate the Area for Surveying

Show us the area you would like us to survey, by firstly adding the postcode to search, then click on the black circle icon and circle your area on the map.