Why Every New-Build Buyer Needs a Snagging Survey (And What It Finds)

Let me share a number with you: 52. That's the number of defects I found during a snagging survey I carried out on a new-build apartment in Kingston last year. The developer was one of the largest housebuilders in the UK. The apartment had been signed off by their own in-house quality control team. It was a brand-new property in a prestigious riverside development, priced at just over £400,000.

Fifty-two defects. From a cracked ceramic tile in the bathroom and a scratched worktop in the kitchen, to — more seriously — a soil stack connection that hadn't been adequately secured, insulation that had been laid incorrectly in the loft, and a bathroom extractor fan that vented into the roof void instead of outside.

The developer rectified all 52 defects before the buyer completed. That's exactly what snagging surveys are for.

What Is a Snagging Survey?

A snagging survey is a detailed inspection of a newly built property, carried out before or shortly after completion, to identify defects, incomplete work, and departures from the specification and building regulations. The resulting snagging list is then presented to the developer, who is legally required to rectify identified defects within the warranty period.

The term "snagging" comes from the construction industry — a snag is a defect or item of incomplete work. A snagging survey systematically records every snag, creating a documented schedule that gives you leverage over your developer.

Why Do New-Build Properties Have Defects?

This surprises many buyers. Surely a brand-new property, built to modern standards with a 10-year NHBC Buildmark warranty, should be perfect?

In theory, yes. In practice, no — and here's why:

• Speed of construction: Housebuilders are under enormous commercial pressure to complete homes quickly. Quality control can suffer as a result.
• Multiple subcontractors: Modern construction involves dozens of different trade subcontractors, each doing their small section of the build. The coordination between trades is where defects often arise.
• End-of-development rush: Defects are particularly common in the final units of a development, when the site team is winding down and attention is elsewhere.
• In-house quality control: Developers' own site managers have a commercial interest in signing off properties — their bonuses often depend on completion targets, not defect-free records.

The good news is that most snagging defects are relatively straightforward to fix. The difficulty is getting the developer to fix them once you've handed over your money and moved in. That's why timing your snagging survey correctly is crucial.

When to Commission Your Snagging Survey

The ideal time for a snagging survey is after the property has been signed off as complete by the developer, but before you legally complete the purchase. At this point, you have maximum leverage — the developer wants your money, and you have the ability to delay completion until snags are addressed.

In practice, developers often resist allowing pre-completion access to independent surveyors. Don't be put off. You have a legal right to commission a survey of a property you're purchasing, and any developer who refuses access is raising a significant red flag about the quality of their product.

If you can't access the property pre-completion, commission the survey as soon as possible after you move in — ideally within the first week. The longer you leave it, the more difficult it becomes to distinguish original defects from damage you've caused yourself.

What Do Snagging Surveys Typically Find?

In my experience carrying out snagging surveys across West London and Surrey, here are the most common findings:

Cosmetic Defects (Very Common)

• Scratched or cracked tiles, flooring, glass or worktops
• Uneven, cracked or poorly finished plasterwork
• Paint holidays, drips, missed areas or wrong colour
• Poorly fitted or misaligned doors, windows or kitchen cabinets
• Visible nail pops in plasterboard ceilings
• Missing or poorly fitted skirting, architraves and beading

Services Defects (Common)

• Sockets and switches not level or properly secured
• Extractor fans not working or vented incorrectly
• Inadequate water pressure or poorly balanced heating system
• Leaking connections on plumbing fittings
• Boiler not commissioned or not functioning correctly

Structural and Building Regulation Issues (Less Common but Critical)

• Insulation incorrectly installed or missing entirely
• Fire stopping missing around service penetrations (a serious safety issue)
• Cavity wall ties incorrectly spaced or missing
• Incorrect fall on drainage, leading to blockage risk
• Roof ventilation inadequate or incorrectly installed
• Structural connections not made to specification

What About the NHBC Warranty?

Most new-build properties come with a 10-year NHBC Buildmark warranty (or similar from Premier Guarantee, LABC, etc.). This is often cited by developers as a reason not to bother with an independent survey.

There are several important things to understand about NHBC warranties:

• In the first two years, the builder is responsible for fixing defects — but you need to notify them. Without a snagging list, you may not know what to notify them about.
• From years 3–10, the warranty only covers major structural defects — not the cosmetic and services defects that snagging surveys commonly identify.
• Making a warranty claim can be a slow and adversarial process. Far better to have defects fixed before you move in.
• NHBC does not inspect every completed property — it carries out spot checks. Their sign-off is not a guarantee that your specific unit is defect-free.

How Much Does a Snagging Survey Cost?

At Hampton Surveyors, our snagging surveys start from £295 for a one-bedroom flat, rising to £495+ for larger houses. Given that we routinely find defects worth thousands of pounds in developer rectification costs, the return on investment is exceptional.

And remember: you're not paying for the repairs. The developer pays for those — because they're legally required to fix defects in new-build properties. Your survey investment is purely to create the documented evidence that forces them to do so.

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