New-Build CCTV Drain Survey: What to Check and When

New homes can still have drainage defects. The pipework is hidden before the buyer moves in, then covered by floors, drives, paving, and landscaping. An independent CCTV drain survey records what can be seen underground, maps the accessible route, and gives the homeowner evidence before a small installation fault becomes a recurring blockage or leak.

Why inspect drainage in a brand-new home?

Buyers normally see finishes, fittings, and visible snagging points. They rarely see the underground runs after trenches have been backfilled. Building debris may remain inside a pipe, a seal may have moved during assembly, or a branch may have poor fall. None of these problems can be confirmed from the age of the property alone.

A survey can trace which fixtures feed each accessible run, where chambers sit, and where private drainage appears to join a shared or public sewer. This helps separate a private defect from a problem that should be reported to the water company. Responsibility depends on the connection and boundary, so the report should record the route rather than make assumptions from a site plan.

The camera may reveal construction debris, standing water, an open or displaced seal, a deformed pipe, a damaged chamber connection, or a branch that does not appear where the drainage plan says it should. Settlement can also alter the fall after installation. A measured report allows the developer or repair contractor to locate the finding without excavating a wide area simply to search for it.

New developments bring different risks from older clay drainage. Our local guide to drainage problems in Solihull covers construction debris, poor falls, surface-water pressure, and the signs that a newer system needs investigating.

For NHBC Buildmark, the builder warranty period is usually two years from the policy start date. NHBC advises owners to contact the builder as soon as reasonably possible and keep records. Terms vary between policies and providers, so check your certificate rather than relying on a general rule. NHBC's first-two-years guidance explains the builder's responsibility and resolution process.

When to arrange the survey

• Before completion, where access is agreed. Findings can be raised before finishes and landscaping make repair more disruptive.
• Soon after moving in. A baseline records the accessible system before months of ordinary use.
• After repeat smells, slow flow, or gurgling. Symptoms should be investigated rather than dismissed as a new system settling.
• Before the builder warranty deadline. Leave time to report the issue, provide evidence, and allow the responsible party to inspect it.

What a useful report should contain

• Dated video with the access point and direction identified.
• Visible pipe material, diameter, branch connections, and changes of material.
• Measured distance to each defect or point the camera cannot pass.
• Still images and plain-language notes explaining what is visible.
• A drainage plan where this has been included in the agreed survey scope.
• A recommendation tied to the finding, without claiming who must pay.

A report does not guarantee a warranty claim. It supplies evidence. The builder, warranty provider, or insurer decides responsibility and cover under the relevant policy.

Case study: kitchen waste was not connected

A homeowner contacted us about foul smells around the kitchen and an outside waste gully. The property was six years old. They first suspected a dirty or blocked drain, but the symptoms did not match an ordinary deposit at the accessible chamber.

The accessible lines were clear, but the kitchen and gully connections did not appear on the expected route. Further investigation and targeted excavation found that the kitchen sink, dishwasher, and gully pipework discharged into the ground beside the property rather than connecting to the foul drainage system.

Why the defect needed correction

• Foul wastewater and odour close to the home.
• Persistent wet ground around the kitchen and patio.
• A defect that could become harder to locate after further landscaping.
• Repair costs if the responsible party or policy did not accept the claim.

Our footage and investigation records helped the homeowner present the defect to NHBC. In this case, the claim was accepted and the required drainage correction was funded. That outcome was specific to the evidence and policy involved and should not be treated as a promise that every drainage finding will be covered.

The homeowner later left the following review on our Facebook page:

The strongest part of the job record was the route evidence: the accessible line was clear, the expected branch was absent, and excavation confirmed where the waste actually discharged.

We provide new-build and homebuyer CCTV surveys across Birmingham, the West Midlands, Warwickshire, and Worcestershire. Tell us whether the survey is for a symptom, completion check, warranty evidence, or property purchase so the scope and report can be agreed before attendance.

For the survey stages and current prices, see our CCTV drain survey cost guide.

New-build drain survey questions

When should I arrange the survey?

Useful times include before completion where access is agreed, soon after moving in, when repeat symptoms appear, and well before the builder warranty deadline. Check your own policy dates.

What defects can CCTV find?

Construction debris, poor fall, standing water, open seals, deformed pipes, unconnected branches, damaged chambers, and incorrect connections may be visible.

Does a report guarantee a warranty claim?

No. It records visible evidence. The relevant builder, warranty provider, or insurer decides responsibility and cover under the policy.

Should the drains be cleaned first?

If deposits or standing waste hide the wall, cleaning may be required before a condition survey. The camera cannot judge a joint it cannot see.