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

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