The Pre-Build Survey Specialist in Radlett
Essential drainage diagnostics and mapping for Radlett extensions and new builds. Secure your Thames Water build-over agreement with Radlett’s technical experts.
- ◉ Building Control Compliant
- ◉ Precision Depth & Invert Level Data
- ◉ Fast-Track Reports for Radlett Developers
100% Approval
Our reports are designed to meet all Radlett local Council planning criteria.
3-Metre Rule
Expert identification of any public sewers within the critical Radlett build zone.
£5M Insurance
Fully insured for all pre-construction and site works within the Radlett area.
Technical Foundations for Radlett Construction.
In a town with as much development as Radlett, from modern urban expansions to sensitive suburban renovations, a Pre-Build Survey is the most critical step in your project’s lifecycle. Building over or near a sewer without professional documentation is a legal and structural risk. Our surveys provide the precise underground intelligence required to protect Radlett’s infrastructure and your investment. We identify the exact location, depth, and condition of pipes, ensuring your foundations are designed correctly and your Radlett planning application proceeds without a hitch.
Specialized Pre-purchase Drain Survey for Radlett Buyers
We offer a suite of specialized investigations that fulfill the rigorous technical requirements of Radlett structural engineers and water authorities.

Build-Over CCTV Inspection
The "Before" report required by Thames Water for Radlett properties, documenting the structural integrity of the sewer before any groundworks begin.
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Depth & Invert Level Verification
We provide the exact measurements Radlett architects need to calculate foundation depths and avoid crushing local drainage lines.
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Public Sewer Identification
Determining exactly which pipes are your responsibility and which are Radlett’s public assets—a critical distinction for legal build-over agreements.
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Load-Bearing Site Mapping
Mapping the drainage network to ensure Radlett new-build loads are distributed safely, preventing future pipe collapses or subsidence.
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Pre-Construction Structural Audit
A full condition assessment of Radlett pipes to identify existing cracks or leaks that must be resolved before construction equipment arrives on-site.
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The "No-Dig" Solution for Radlett Developers
Our solution focuses on deliveringthe hhighest-resolutiondata with zero site disruption. We ensure your Radlett construction project meets all Part H Building Regulations through non-invasive, high-speed diagnostics.
- ◉ Precision Sonde tracing to identify pipe direction on Radlett sites.
- ◉ Detailed WinCan reports accepted by Radlett's legal and water authorities.
- ◉ Technical advice on pipe protection and diversion for Radlett builds.
Non-Invasive Site Intelligence
Our Pre-Build Survey is entirely trenchless, using advanced camera technology to explore your Radlett site without disturbing the ground.
Radlett Site Prep
We identify all access points and map the build-zone relative to existing Radlett sewer assets.
Our engineer arrives at your Radlett address equipped with the latest CCTV technology.
HD CCTV Exploration
High-resolution cameras are inserted to document every joint, crack, and connection in the Radlett network.
Data Package Delivery
You receive a professional report containing HD video, site maps, and depth data for your Radlett build-over application.
What Our Customers Say
Daniel K., Radlett Architect
"Highly Efficient. We needed a Pre-Build Survey for a Radlett town-center project. They coordinated with the agent and delivered the Thames Water-ready report in 24 hours."
Megan R., Radlett Homeowner
"Peace of Mind. Our Radlett builder insisted on a survey before our extension. The team found a collapsed pipe we didn't know about, saving us thousands in potential damage."
Simon V., Radlett Project Manager
"Professional Data. Their mapping was millimeter-perfect. Essential for any developer working in the Radlett area who wants to avoid planning delays."
Why Choose Us?
We are Radlett’s leading pre-construction drainage authority. Our team provides the specialized technical data that Radlett’s professional building sector demands for every project.
Radlett Infrastructure Knowledge
Our engineers have years of experience working with Radlett’s unique drainage topography, ensuring we find assets that generic firms miss.
Advanced Diagnostic Equipment
We use the latest HD crawler cameras and sonar locators to ensure your Pre-Build Survey is the most accurate in the Radlett area.
Solicitor & Authority Approved
Our reports are specifically formatted to be accepted by Radlett local Council and Thames Water, streamlining your build-over agreement.
Fixed Radlett Pricing
We provide transparent, upfront quotes for all Radlett projects, ensuring you can budget for your survey without hidden "emergency" fees.
Rapid Site Turnaround
We know Radlett construction schedules are tight. We offer priority booking for pre-build projects to keep your development on track.
End-to-End Compliance
From initial tracing to final "post-build" verification, we handle the entire compliance process for Radlett developers and homeowners.
Secure Your Radlett Build-Over Approval.
Get the professional drainage data your Radlett project needs. Book your survey today.
Frequently Asked Questions
Why do I need a Pre-Build Survey for my Radlett extension?
A Build-Over Agreement is required if you are building within 3m of a public sewer in Radlett. It protects you and the water authority.
Will this survey satisfy Thames Water in Radlett?
Yes. We use WinCan reporting software, which is the industry standard accepted by Thames Water and Radlett building control.
What happens if you find damage during the Radlett survey?
We will provide a clear HD video of the damage and a fixed-price quote to repair it before your Radlett build commences.
Do I need a post-build survey as well in Radlett?
Often, yes. Water authorities in Radlett may require a “Post-Build” check to ensure your construction hasn’t damaged the sewer.
How long is a Pre-Build Survey valid for in Radlett?
Usually, these surveys are valid for 12 months, provided no significant groundworks have occurred on your Radlett site since the check.
Can you trace the depth of the pipe for my Radlett structural engineer?
Absolutely. Our Sonde and Trace technology provides the exact depth data Radlett engineers need for footing designs.
Do you work with Radlett-based architects?
Yes, we are the preferred drainage partner for many architectural firms across the Radlett area for all pre-construction works.
Is the survey messy or disruptive to my Radlett property?
Not at all. It is entirely non-invasive. We access the pipes through existing manholes on your Radlett site.
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Find your local team
We proudly serve
- • Rickmansworth
- • Kings Langley
- • Abbots Langley
- • Borehamwood
- • Shenley Radlett
- • Watford
- • Bushey
and all surrounding Area.