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What is a CCTV drain survey?
Quick answer
A CCTV survey examines accessible drain interiors using a camera. Specify whether you need a diagnostic check, a formal report, location mapping or evidence for planned work.
When do I need a CCTV drain survey?
Consider a survey for persistent blockages, suspected damage, a property purchase or planned works affecting drainage. Tell the surveyor the question you need answered. An inspection commissioned to locate a blockage may not meet the reporting needs of a buyer or building proposal.
What can a CCTV drain survey find?
A camera records visible condition in accessible pipes: deposits, roots, cracks, joints and standing water. A useful report ties observations to distance, direction and a plan, states where inspection stopped and explains how recommendations follow. A photograph alone does not establish why a cellar is wet or the capacity of an entire network.
The April 2021 Blomfield Street investigation judged groundwater highly probable for the January–February basement flooding after separate asset checks. That historical finding illustrates the limit of treating all water ingress as a pipe defect. A private CCTV visit does not assess groundwater risk or diagnose a present Bury property from that report.
Useful next steps
Sources: Blomfield Street flood investigation · Long-term flood lookup
CCTV drain survey cost
Ask whether the quote includes…
A brief camera check during unblocking is not necessarily a full homebuyer survey.
- All relevant accessible drain runs.
- Cleaning needed for camera visibility.
- Footage and a written report in the format you need.
- Location mapping and VAT.
How long does a CCTV drain survey take?
The time depends on the network, access and whether cleaning is required for visibility. Tell the surveyor about locked gates, concealed covers and previous extensions. Confirm when the written report will arrive as well as how long the visit is expected to take.
Drain survey before buying a house
Ask the conveyancer or building adviser which questions the survey must answer before booking. Condition, ownership, access and extension feasibility need different evidence. Agree included lengths, cleaning, locating, drawing, footage and a written report, with any shared-access consent arranged beforehand.
For a Bury purchase, check the actual conservation/listing status and utility records rather than infer them from the postal address. Cellar access or retained floors may limit the inspection. A report should say what remains unknown so the purchase adviser can decide whether more investigation is needed.
Sources: Conservation areas and appraisals · Listed buildings · Sewer pipe responsibility
Homebuyer drain surveys
Specify a purchase report that separates observations, probable explanations and recommended next steps. Ask for a clear route plan and limitations, including areas obscured by water, inaccessible covers or incomplete cleaning. Keep that evidence alongside the drainage search and wider building survey.
The official long-term flood lookup describes risk around an area, not the likelihood of one house flooding, and it does not assess blocked drains or burst pipes. For a Bury property, drainage condition and wider water-ingress questions therefore need separate consideration. Seek the appropriate adviser rather than regard clear camera footage as a flood-risk certificate.
Sources: Long-term flood lookup
Finding collapsed drains
Quick answer
If a camera cannot pass an obstruction, ask what supports a diagnosis of collapse. The report should state where inspection stopped and how the suspected defect was located.
Finding cracked drain pipes
Ask for images, location and an explanation of the significance of a reported crack. Visibility can be limited by deposits or water. Confirm whether the pipe was clean enough to assess and whether the defect is linked to the symptom that prompted the survey.
Finding tree roots in drains
A report should show the roots, the affected distance and any visible entry point. Discuss clearance and repair separately. If roots prevent a complete inspection, a further survey after removal may be needed to understand the remaining pipe condition.
Finding recurring blockages
Give the surveyor dates, affected fixtures and earlier clearance records. Inspection is often most informative once sufficient flow and visibility have been restored. Ask for recommendations that explain why blockages return rather than just a list of visible observations.
Locating underground drains
Quick answer
Camera inspection does not automatically include locating or a drainage plan. Agree whether depth, route marking and mapping are included before relying on the survey for building work.
CCTV survey after drain repairs
After repair, ask for evidence that the specified area has been treated and flow checked. Agree this in the original scope so it is not an unexpected extra. Keep the footage and written record alongside the repair invoice and warranty.
Do I get a drain survey report?
Confirm the deliverables
Check any required format with your builder, insurer or conveyancer before commissioning the survey.
This fictional example shows how to read survey findings. Your surveyor’s report may use a different format; check what you will receive before commissioning the survey.
Notice how the example separates what was seen from what could not be inspected. A distance along a pipe is useful, but it may need route locating to identify where that point lies under a garden or driveway. A recommendation should explain the remaining uncertainty rather than converting every observation into an immediate repair order.
- Footage and findings you can understand.
- Inspected lengths and any inaccessible sections.
- Location information, where commissioned.
- Limitations and recommendations.
| Report field | Fictional example | How to read it |
|---|---|---|
| Purpose | Investigate a recurring blockage | Check that the commissioned question is actually addressed. |
| Inspected run | Chamber A towards Chamber B | The start, direction and run should be identifiable. |
| Visible finding | Roots visible at 4.2 metres | Ask for footage and an identifiable location; removal and repair are separate decisions. |
| Limitation | Camera stopped at an obstruction at 8 metres | The pipe beyond that point has not been assessed. |
| Ownership | Shared connection requires clarification | Refer suspected public assets to the operator; do not infer ownership from garden access. |
| Next step | Clear the obstruction, then inspect the remaining run | Agree this further work and its cost before treating the survey as complete. |
Do I need a CCTV survey before building an extension?
Let the designer define the information needed: route, condition, depth information where measured, access and utility status. Camera footage can help, but it is not sewer ownership evidence or approval to build. Agree how unknown or inaccessible runs will be resolved before foundations are specified.
For a Bury extension, consult Anglian Water about relevant sewer/build-over requirements and West Suffolk about the applicable planning, building-control and heritage checks. Keep each approval distinct. An enquiry, a private report or a neighbouring extension does not establish permission for this proposal.
Sources: Home renovations and water/drainage · Listed buildings · Building regulations · Sewer pipe responsibility