Duct Survey

Subvision Surveys provides duct surveys, mapping the route, condition and capacity of underground cable ducting used to carry power, telecoms and data cables. This information is essential before new cables are installed, before excavation near existing ducting, or when assessing whether existing ducts can accommodate additional cabling.

What a Duct Survey Involves

Our team uses duct rodding and CCTV camera equipment to inspect the inside of underground ducts, identifying blockages, damage, collapses or restrictions that could prevent a cable being pulled through. The camera survey records clear footage of the duct’s internal condition along its full length, giving you an accurate picture of whether a duct is fit for use, in need of repair, or unsuitable for further cabling.

Mapping Duct Routes and Capacity

Alongside condition assessment, we trace and map the route of existing duct networks, recording their position, depth and any changes in direction or connection points. This is particularly useful where duct records are incomplete, out of date, or missing entirely, which is common on older sites or where ducting was installed by multiple contractors over time. Understanding both the route and the remaining capacity of existing ducts helps avoid unnecessary excavation for new ducting where existing infrastructure could be reused.

Why Duct Surveys Matter

Installing new cables into a duct that’s damaged, blocked or undersized can cause delays, additional cost and abortive works if the problem is only discovered mid-installation. A Buried Duct Survey identifies these issues in advance, giving telecoms providers, utility companies and contractors the confidence to plan cable installation or duct repair work accurately, rather than working from assumptions or incomplete as-built records.

Why Choose Subvision for Duct

Subvision Surveys is SSIP and ISO accredited, with a team of over 25 surveying professionals delivering duct surveys for contractors, developers and utility providers across London, the South East and nationwide. Because we also provide GPR and utility mapping services in-house, duct survey findings can be combined with wider utility data for a more complete picture of a site’s underground infrastructure.

Contact Subvision Surveys today to discuss your duct survey requirements, or speak to one of our experts on 0333 920 942.

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DUCT SURVEY FAQ’S

Subvision Surveys has been providing professional surveying services for over 25 years, supporting domestic and commercial clients across Essex and the UK. Our experienced surveyors use advanced detection equipment and proven surveying techniques to accurately locate underground ducts, helping our clients reduce risk, avoid unnecessary delays and plan projects with confidence. We’re SSIP and ISO accredited, giving clients assurance that every survey is carried out to recognised industry standards. With a team of over 25 surveying professionals, we combine hands-on experience with the latest detection technology to deliver reliable, accurate results on projects of any size.

Our team works with homeowners, architects, engineers, developers, construction companies, utility contractors, civil engineering firms and local authorities across Essex, the South East and nationwide. Whether we’re supporting a residential extension or a major commercial development, we tailor every duct survey to suit the specific requirements of your project. Our clients range from private individuals managing a single small job through to Tier 1 contractors overseeing multiple sites, and we adjust our approach, reporting and turnaround times accordingly, so every client gets a survey that matches the scale and demands of their project.

Our duct surveys help identify the location and route of underground ducts carrying electrical, telecommunications, fibre optic and other utility services. By providing accurate information about existing ducting, we help our clients make informed decisions before excavation, construction or maintenance work begins. Where a more complete underground picture is needed, our duct survey findings can be combined with wider utility mapping or GPR data, giving contractors and engineers a fuller understanding of a site’s underground infrastructure rather than relying on duct location data in isolation.

Every duct survey begins with understanding your site and project requirements, including the type of work planned and any known site history. Our experienced surveyors then systematically scan the survey area using professional detection equipment, before carefully analysing the results. We provide clear survey drawings and reports that support architects, engineers, contractors and project managers throughout the project, giving them accurate, easy-to-interpret information they can plan excavation, construction or maintenance work around with confidence, rather than relying on outdated or incomplete existing records.

Underground ducts are not always accurately recorded, making them easy to damage during excavation or construction work. Our duct surveys help identify existing ducting before work starts, reducing the risk of costly repairs, service interruptions and project delays while creating a safer working environment. Damage to live telecoms or power ducting can also affect services well beyond the site itself, so identifying ducting in advance protects not just your project timeline and budget, but the wider network the ducting forms part of.

Yes. We regularly combine duct surveys with Ground Penetrating Radar (GPR) surveys, underground utility surveys, PAS128 utility mapping and topographical surveys. By combining multiple surveying techniques, we provide our clients with a more complete understanding of their site before work gets underway. Because Subvision Surveys carries out all of these services in-house, combining survey types doesn’t mean coordinating between separate providers, our own team applies whichever combination of techniques best suits your site, giving you one clear, consistent set of results.

When you choose Subvision Surveys, you’re choosing a specialist team with more than 25 years of industry experience and a reputation for accuracy, reliability and excellent customer service. From your initial enquiry through to receiving your completed survey information, we provide clear communication, expert advice and dependable survey solutions that support domestic and commercial projects of every size. We’re SSIP and ISO accredited, and our approach is built around understanding your project first, so the survey you receive is genuinely useful for the decisions you need to make.

Have Any Questions?

If you have any questions regarding our services feel free to contact the Subvision team.