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

Build-Over CCTV Inspection
The "Before" report required by Thames Water for Marlow 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 Marlow 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 Marlow’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 Marlow 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 Marlow 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 Marlow Developers
Our solution focuses on deliveringthe hhighest-resolutiondata with zero site disruption. We ensure your Marlow construction project meets all Part H Building Regulations through non-invasive, high-speed diagnostics.
- ◉ Precision Sonde tracing to identify pipe direction on Marlow sites.
- ◉ Detailed WinCan reports accepted by Marlow's legal and water authorities.
- ◉ Technical advice on pipe protection and diversion for Marlow builds.
Non-Invasive Site Intelligence
Our Pre-Build Survey is entirely trenchless, using advanced camera technology to explore your Marlow site without disturbing the ground.
Marlow Site Prep
We identify all access points and map the build-zone relative to existing Marlow sewer assets.
Our engineer arrives at your Marlow address equipped with the latest CCTV technology.
HD CCTV Exploration
High-resolution cameras are inserted to document every joint, crack, and connection in the Marlow network.
Data Package Delivery
You receive a professional report containing HD video, site maps, and depth data for your Marlow build-over application.
What Our Customers Say
Daniel K., Marlow Architect
"Highly Efficient. We needed a Pre-Build Survey for a Marlow town-center project. They coordinated with the agent and delivered the Thames Water-ready report in 24 hours."
Megan R., Marlow Homeowner
"Peace of Mind. Our Marlow 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., Marlow Project Manager
"Professional Data. Their mapping was millimeter-perfect. Essential for any developer working in the Marlow area who wants to avoid planning delays."
Why Choose Us?
We are Marlow’s leading pre-construction drainage authority. Our team provides the specialized technical data that Marlow’s professional building sector demands for every project.
Marlow Infrastructure Knowledge
Our engineers have years of experience working with Marlow’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 Marlow area.
Solicitor & Authority Approved
Our reports are specifically formatted to be accepted by Marlow local Council and Thames Water, streamlining your build-over agreement.
Fixed Marlow Pricing
We provide transparent, upfront quotes for all Marlow projects, ensuring you can budget for your survey without hidden "emergency" fees.
Rapid Site Turnaround
We know Marlow 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 Marlow developers and homeowners.
Secure Your Marlow Build-Over Approval.
Get the professional drainage data your Marlow project needs. Book your survey today.
Frequently Asked Questions
Why do I need a Pre-Build Survey for my Marlow extension?
A Build-Over Agreement is required if you are building within 3m of a public sewer in Marlow. It protects you and the water authority.
Will this survey satisfy Thames Water in Marlow?
Yes. We use WinCan reporting software, which is the industry standard accepted by Thames Water and Marlow building control.
What happens if you find damage during the Marlow survey?
We will provide a clear HD video of the damage and a fixed-price quote to repair it before your Marlow build commences.
Do I need a post-build survey as well in Marlow?
Often, yes. Water authorities in Marlow 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 Marlow?
Usually, these surveys are valid for 12 months, provided no significant groundworks have occurred on your Marlow site since the check.
Can you trace the depth of the pipe for my Marlow structural engineer?
Absolutely. Our Sonde and Trace technology provides the exact depth data Marlow engineers need for footing designs.
Do you work with Marlow-based architects?
Yes, we are the preferred drainage partner for many architectural firms across the Marlow area for all pre-construction works.
Is the survey messy or disruptive to my Marlow property?
Not at all. It is entirely non-invasive. We access the pipes through existing manholes on your Marlow site.
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We proudly serve
- • Slough
- • Windsor
- • Ascot
- • Maidenhead
- • Marlow
- • Bourne End
- • Gerrards Cross
and all surrounding Area.