Should You Get a CCTV Drain Survey Before Buying in Lewisham?

Most people asking this question are trying to decide between spending a few hundred pounds and gambling. That is a reasonable question, because nobody wants to pay for a survey that finds nothing. The useful way to think about it is that a survey does not reduce the risk, it moves the risk from after completion, when it is entirely yours, to before completion, when it is a negotiating point. What follows is how that trade-off looks on real Lewisham housing stock rather than in general terms.

What A Standard Survey Does Not Look At

A building survey is an inspection of the structure. It looks at the roof, the chimney, the walls, the loft, the damp and the obvious defects, and it will usually record drainage as inspected only from the manhole cover or not inspected at all. Nothing about that is a flaw in the survey, because the private drain is out of scope.

A CCTV drain survey is a different job. A camera is fed into the run and records the pipe itself, which means the report can name the material, the diameter, the depth, the route and every defect found along the way. It is the only way to know whether the drain under a particular house is sound, partly failed or already on its way out before you own it.

The Lewisham Properties Where It Pays Most

The council's own housing retrofit strategy states that the most common wall type in Lewisham is solid brick, in homes usually built before the 1930s, and it names the Victorian and Edwardian terraces common in London as a defining feature of the borough. The borough characterisation study dates its Victorian housing at Catford to around the late 1890s. That is the housing most likely to have original brick barrel and clay pipework still in the ground, so that is where the survey does the most work.

The interwar and post-war estates are a different case and worth separating out. The Bellingham Estate was built in 1923 with 2,700 homes, the Downham Estate followed between 1924 and 1930, and the Grove Park estate between 1926 and 1929, with planned street layouts at Catford and Hither Green being built out in the same period and terraces and semi-detached houses gradually replacing earlier villas. After the war came the Passfields estate at Daneswood Avenue in Catford, built between 1949 and 1950 and designed by Maxwell Fry and Jane Drew. Cavity-wall homes in the borough are typically from the 1930s onwards, and their drainage tends to be shorter and shallower, but a shared run that serves a whole row is still a shared run. A survey is still useful there; it is just answering a narrower question.

Where It Is Reasonable Not To Have One

There are three situations where the money is better spent elsewhere. The first is a flat with a complete freeholder pack, where the drainage is documented and the responsibility sits with the management company rather than with you. The second is a property with a recent, dated CCTV report from a previous owner, which is worth reading rather than repeating. The third is a sale where the timetable leaves no room for the report to arrive before completion, where a survey you cannot use in the negotiation is money spent for information only.

If you are still unsure, the useful question is not about the postcode. It is whether anyone in the chain has ever had the drains looked at, and whether there has been a blockage in the last few years that went away on its own.

What You Should Expect The Engineer To Find

Expect a mixed picture rather than a verdict. On housing of this age the usual findings are open or slightly displaced joints, root ingress where the run crosses a garden, encrustation on the bottom of the pipe, and the occasional length where a previous repair has been clipped in at a different angle. Any one of those is manageable. What you are looking for is a single point of failure, a collapse or a step, and that is what a camera finds in an afternoon and a normal survey never will.

It is worth knowing that the council's own committee papers name the aging housing stock, with many pipes corroding and leading to leaks, as a major challenge, and the 2024-25 housing stock condition survey found 24% of the council's homes failed the decency standard, with 3,069 damp and mould cases recorded as at 15 September 2024. Corroded pipework is a description that applies to the borough as a whole, not to your particular house, and a survey is how you find out which side of that line you are on.

Buying And Extending At The Same Time

If the plan is to build at the property, do the survey first. Thames Water requires a build-over agreement for building works within 3 metres of a public sewer or within 1 metre of a public lateral drain, and planning permission does not grant permission to build over a sewer. A minor diversion may be possible where the sewer is 150mm or less in internal diameter and the diversion is 20m or less, but you only know which case you are in once the pipe has been recorded, and that is far cheaper to establish before the design is fixed than after.

The written report is written to be handed to a solicitor or a planning officer, so the same visit can do double duty for the purchase and the planning file.

Cost, Access And Timing

A domestic CCTV drain survey typically costs between £120 and £280, quoted at a fixed price agreed before the work starts. A survey needs a camera unit and a monitor rather than a jetting lorry, so access is often straightforward, but if the run is reached from a manhole on a controlled parking bay the council's process applies: applications to suspend a bay in Lewisham must be made at least five working days before the start date, with a £62 administration fee per application, £56 per bay per day for pay-to-park and shared-use bays, and £62 one off for resident permit bays. A suspension can run for up to six months and anything longer needs a temporary traffic order, and none are possible on Red Routes.

For the borough pages, our CCTV drain survey in Lewisham page covers the parking zones and the access notes street by street, and the CCTV drain survey page covers the equipment and what the report contains.

Last Updated: 23 September 2026