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

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