How-to
CCTV Drain Survey: What It Costs, What It Finds, and When You Actually Need One
Demystifying the drain camera survey: what it shows, what it typically costs, and when you genuinely need one versus when it's an upsell.
Published 15 July 2026
A drain camera is a genuinely useful tool — but it is not the right answer for every blocked drain. This guide explains what a CCTV survey actually involves, what you can expect to pay, and how to decide whether you need one or whether a straightforward clearance will do the job.
What Is a CCTV Drain Survey?
A CCTV drain survey involves pushing a flexible rod fitted with a waterproof camera through your drainage pipework. The footage is recorded in real time so the engineer can see exactly what is happening inside the pipe. A written report — usually with screenshots or a video file — is produced afterwards.
The camera can travel through inspection chambers, along underground runs, and into the junctions where multiple pipes meet. Modern equipment includes a locator sonde, which lets the engineer mark the precise position and depth of a fault on the surface above — useful if any excavation is needed later.
What Does the Camera Actually Find?
A survey can reveal things that rodding and jetting simply cannot confirm:
- Root ingress — tree roots entering through cracked or poorly jointed pipes
- Pipe collapse or deformation — sections that have shifted, cracked, or been crushed by ground movement
- Displaced joints — where pipes have separated slightly, allowing debris to catch and build up
- Grease and scale build-up — accumulated fat deposits that narrow the bore over time
- Incorrect falls — pipes laid without enough gradient, so waste sits rather than flows
- Foreign objects — items flushed or dropped into the system that partial jetting has not shifted
- Condition of older clayware — particularly relevant in pre-1970s properties across the TW area
A camera survey gives you evidence, not guesswork. That matters when you are deciding whether to jet a blockage again or commit to a repair.
What Does a CCTV Drain Survey Cost?
Prices vary by region, drain length, and what is included in the report. As a general guide for the TW postcode area:
- Basic survey (single drain run, up to around 25 m): typically £80–£150
- Full drainage survey (multiple runs, inspection chambers, written report with video): typically £200–£400
- Pre-purchase survey (comprehensive, with condition grading): typically £250–£500 depending on property size
These figures are indicative. Any reputable company should give you a fixed quote before starting work. Be cautious of very low headline prices that exclude the report or charge separately for every metre of camera travel.
When Do You Genuinely Need One?
Repeat Blockages in the Same Location
If the same drain blocks two or three times in a year, jetting is treating the symptom. A camera survey will tell you whether there is a structural reason — root ingress, a displaced joint, a collapsed section — that means the blockage will simply return until the underlying fault is fixed.
Buying a Property
A CCTV drain survey before exchange is one of the most cost-effective checks you can do. Drainage repairs, particularly if they involve excavation, can run into thousands of pounds. Knowing the condition of the drains before you complete gives you the opportunity to renegotiate or budget accurately.
Slow Drainage Across Multiple Outlets
When several fixtures in a property are all draining slowly, the problem is likely downstream in a shared run. A camera locates the exact point so repairs are targeted rather than exploratory.
Before Major Building Work
If you are extending, landscaping, or having a new driveway laid, a survey beforehand establishes the existing condition of any drains that will be built over or near. This protects you if a dispute arises later about whether the work caused damage.
After a Suspected Drain Collapse
Heavy vehicles crossing an unmapped drain, significant ground movement, or a sudden change in drainage behaviour can all indicate structural damage. A camera confirms it.
When You Probably Do Not Need One
If you have a single, first-time blockage with an obvious cause — a build-up of wipes, a grease clog, or a blocked gully — a straightforward high-pressure water jet is usually the right starting point. A competent engineer will clear the blockage and advise you honestly whether the drain’s behaviour warrants further investigation.
A CCTV survey should be recommended because the evidence points to an underlying problem, not offered automatically as an add-on to every call-out.
What to Ask Before Booking
- Is the report included in the price, or charged separately?
- Will I receive a video file or screenshots, not just a verbal summary?
- Does the price include locating and marking any faults?
- How long will the report take to produce?
A written report with timestamped footage is also the documentation your insurer will typically ask for if you are making a claim for drain damage — so it is worth confirming the format before the survey begins. The report belongs to you; keep it safe.
If you are dealing with a blocked or slow-draining system right now and are not sure whether you need a survey or a clearance, give us a call on 07725 479493. We are available 24/7 across Hounslow, Twickenham, Richmond, and the wider TW area, and we will give you a straight answer before any work begins.