Drainage Surveys
Whether you are investigating a problem, buying or selling a property, or checking compliance, UKDP provides clear findings on the condition of your on-mains or off-mains drainage system.
What is a Drainage Survey?
A drainage survey is a structured assessment of an on-mains or off-mains drainage system. It establishes the system’s layout, condition and, where relevant, whether it meets current requirements.
Depending on what needs investigating, the survey may examine accessible pipework, tanks, treatment plants, soakaways and other connected components. CCTV equipment can be used where a view inside the pipework is required.
UKDP records the findings in a written report. If a problem is identified, the report explains the issue, recommends appropriate repair or replacement work and provides guideline costs.
Who Needs a Drainage Survey?
A drainage survey is useful when the condition, layout or compliance of a system is unclear. UKDP supports:
- Property owners and landowners investigating unexplained drainage problems.
- Home buyers and sellers seeking clear information before a transaction.
- Estate agents helping sales progress without unexpected drainage issues.
- Insurers requiring factual evidence of a system’s condition and damage.
We begin by establishing what you need to find out. We can then recommend the most appropriate survey for your on-mains or off-mains system, rather than defaulting to CCTV when another type of inspection would be more useful.
Which Type of Drainage Survey Do You Need?
The right survey depends on the system, the reason for the inspection and the level of detail required.
Home Buyer Drainage Survey
Understand the condition, capacity and compliance of a property’s septic tank system before completing your purchase. Choose the Plus survey if CCTV inspection of accessible pipework is also required.
Learn moreCompliance Survey
Check whether an on-mains or off-mains drainage system meets the requirements that apply to it. UKDP identifies areas of concern and explains any action needed to bring the system into compliance.
Learn moreHome Seller Drainage Survey
Establish the condition of your septic tank system before placing or progressing a property sale. The report identifies concerns, recommended action and guideline costs, helping you provide buyers with clear information.
Learn moreCCTV Survey
Inspect the inside of accessible drainage pipework to locate damage, blockages and structural defects. You receive a detailed report, supporting images or footage, and recommendations with estimated costs where remedial work is required.
Learn moreWhat Does a UKDP Drainage Survey Include?
The exact scope depends on the survey selected and whether the property uses an on-mains or off-mains system.
Written condition report
A clear record of the drainage system’s condition, the areas inspected and any concerns identified to ensure the results are fully clear.
Pipework findings
Details of visible blockages, fractures, displaced joints, root ingress and other defects within accessible drainage pipes.
Off-mains system assessment
Where relevant, findings on the condition, components and capacity of a septic tank or sewage treatment plant.
Compliance findings
An assessment of whether the drainage arrangement meets the current requirements relevant to the system and property.
Images and CCTV footage
Supporting photographs and, where CCTV is included, recorded footage of the accessible underground pipework.
Recommendations and guideline costs
Practical repair or replacement recommendations, supported by estimated costs where remedial work is required.
What Do UKDP Customers Say About Our Expert Drainage Services?
UKDP have, from my first contact with them, been very helpful, informative and re-assuring even when all hope seemed lost for a favourable outcome. Their in-depth knowledge and sheer determination made our claim possible where I feel sure most companies would have given up!
Thank you all so very much for all your work on my behalf. There is no way it was going to get done without your input. I would recommend you to anyone with similar problems. It's such a relief to have it done. Thanks again.
UKDP had been monitoring our problems with root ingress and decided the treatment plant would need replacing. They offered to manage the insurance claim, which they did very successfully. I had very little to do. Real specialists!
How is a UKDP Drainage Survey Carried Out?
The precise checks depend on the survey selected, but the process follows a clear route from your initial enquiry to the completed report.
Discuss your requirements
Tell us whether the survey concerns a drainage problem, property transaction or compliance issue.
Confirm the right survey
We recommend the most appropriate CCTV, Compliance, Home Buyer or Home Seller Drainage Survey.
Engineer site visit
A field engineer attends the property and identifies the accessible parts of the drainage system.
Complete the inspection
The engineer carries out the relevant condition, capacity, compliance or CCTV checks.
Prepare your report
We document the findings, including supporting images or footage where these form part of the survey.
Explain the next steps
You receive clear recommendations and guideline costs where further work may be required.
Who Do We Help with Drainage Surveys?
UKDP supports people who need clear evidence about a drainage system’s condition, whether they are investigating a problem, managing a property or progressing a transaction.
Homeowners
Drainage surveys that show the condition of the system serving your home before you buy, sell or commit to repairs.
Learn moreLandowners
Investigate drainage problems across individual properties, rural estates and larger portfolios. UKDP provides clear findings and practical recommendations for any further work.
Learn moreInsurers
Obtain factual findings, supporting evidence and a recommended scope of work where drainage damage may be covered, subject to the policy terms and claim decision.
Learn moreEstate Agents
Give buyers and sellers clearer information about the drainage system’s condition and any recommended work before a property transaction progresses.
Learn moreWhat Problems Can a Drainage Survey Find?
Drainage problems are not always visible from the surface. A survey helps establish what is happening within the accessible system and provides evidence for the next decision.
What you may notice
- Drains block repeatedly
- Water drains more slowly than usual
- Sewage backs up or fails to clear
- Unpleasant drainage odours develop
- Damp, pooled or sunken ground appears
- You are unsure about the system’s condition
What a UKDP survey can establish
- The location and likely cause of the obstruction
- Whether restricted flow, deposits or damaged pipework are contributing
- Where wastewater is no longer flowing or discharging as expected
- Whether accessible defects or damaged connections may be responsible
- Whether leakage, displaced joints or damaged pipework may be involved
- A clearer record of its accessible condition and any recommended work
What Do UKDP Drainage Surveys Look Like in Practice?
How Much Does a Drainage Survey Cost?
The cost of a drainage survey depends on the type of inspection required and the size of the property. A full CCTV drainage survey starts from £300 + VAT, while a Compliance Survey costs £360 including VAT for on-mains drainage or £399 including VAT for off-mains drainage.
Before recommending an option, UKDP will discuss the problem you are experiencing and what you need the survey to establish. This helps determine whether CCTV is appropriate or whether another type of drainage survey would provide a more useful answer.
Why Choose UKDP for Drainage Surveys
UKDP combines established drainage experience with practical advice, detailed reporting and nationwide support. From identifying the right survey to explaining the findings, we help you make an informed decision about what happens next.
Drainage experience since 2009
UKDP has been investigating drainage systems since 2009, bringing proven technical knowledge to every survey.
Advice before you book
We discuss the issue first and advise whether CCTV or another type of drainage survey would provide the most useful answer.
On-mains and off-mains knowledge
Our experience covers conventional drainage as well as septic tanks, sewage treatment plants and other private wastewater systems.
Clear, evidence-based reporting
You receive documented findings, supporting images or footage where included, recommendations and guideline costs for any work identified.
Professional indemnity cover of £2 million
Our cover provides additional reassurance that the technical findings and recommendations in your survey are professionally supported.
Nationwide, locally delivered
UKDP engineers and trusted local partners deliver drainage surveys across the UK, coordinated by our central team.
What Will You Receive After the Drainage Survey?
Once the inspection is complete, UKDP prepares a written report explaining what was examined, the condition found and any problems identified. It also sets out our conclusions, recommended next steps and guideline costs where further work may be required.
Depending on the survey selected, the report may include photographs, CCTV images or recorded footage. This gives you a clear record to use when planning repairs, reviewing compliance, progressing a property transaction or discussing an insurance claim.
What Else Should You Know About Drainage Surveys?
CCTV Drainage Surveys and Septic Tank Inspections
See how CCTV surveys help investigate hidden problems affecting drains, septic tanks, sewage treatment plants and soakaways.
Read article
Collapsed Drain? How to Spot, Claim and Prevent Damage
Recognise the warning signs of a collapsed drain and learn how a professional CCTV survey can provide evidence of the damage.
Read article
Should I Buy a House With Private Drainage?
Learn what owning a private drainage system involves and why its condition should be checked before purchasing a property.
Read articleDrainage Survey: Frequently Asked Questions
Ask our teamDoes a standard building survey include the drainage system?
A typical building survey does not assess the condition of an existing drainage system in detail. A specialist drainage survey examines the accessible system and provides findings specifically relating to its condition, operation and any visible concerns.
Should I arrange a drainage survey before buying a property?
You should. A survey can help you understand the drainage system before the purchase is completed. This is particularly useful for properties with septic tanks or other private drainage, where the buyer may become responsible for the entire system after completion.
Can a seller arrange a drainage survey before marketing a property?
Yes. A Home Seller Drainage Survey provides information about the system’s condition that can be shared with prospective buyers. It may also give the seller time to consider any recommended work before it affects negotiations or delays the transaction.
Does a septic tank need to be emptied before a Home Buyer Drainage Survey?
Yes. The septic tank needs to be emptied on the day of the survey so the engineer can clearly inspect its internal structure. UKDP helps arrange the emptying if needed.
Will I receive a copy of the CCTV footage?
UKDP’s Home Buyer Drainage Survey Plus includes a copy of the CCTV footage for you to keep, alongside a detailed WinCan inspection report. A standalone CCTV survey also includes images and videos as part of its findings. You can check out a sample report here.
Can UKDP survey both on-mains and off-mains drainage?
Yes. UKDP surveys conventional on-mains drains as well as private systems such as septic tanks, sewage treatment plants and soakaways. The checks carried out depend on the system installed and the reason for commissioning the survey.
Can a drainage survey identify compliance concerns?
A Compliance Survey reviews the drainage system and highlights areas that may require attention under current regulations. For off-mains systems, the assessment may cover the tank, treatment plant, discharge arrangements and, where appropriate, percolation testing.
Can landlords arrange a drainage survey before a new tenancy?
Yes. A landlord can commission a survey to create a record of the drains’ condition before a tenant moves in. This may help distinguish an existing defect from a drainage problem that develops or is reported during the tenancy.
Ready to Survey Your Drainage?
Tell us what you need to establish, and we’ll recommend the drainage survey best suited to your property and enquiry.