Snagging surveys: what new-build buyers need to know

There is a persistent assumption that a brand-new house must be a defect-free house. Anyone who has worked inside the construction industry knows better. New-build homes are assembled quickly, by many trades, under commercial pressure — and they routinely complete with defects ranging from the cosmetic to the genuinely serious.

A snagging survey is how buyers level the field.

What “snags” actually look like

The word suggests trivial paint blemishes, and plenty of snags are exactly that. But a methodical inspection of a new build regularly finds items such as:

• missing or displaced loft insulation
• roof tiles not properly fixed, or flashings poorly dressed
• mortar snots and debris left in wall cavities and weep holes blocked
• doors and windows out of alignment, missing seals, failed double-glazing units
• plumbing weeps under baths and sinks, unclipped pipework
• incomplete fire-stopping around service penetrations
• ventilation ducting disconnected in the loft, venting into the roof space
• garden drainage and landscaping problems that only appear after rain

Individually most items are fixable in minutes or hours. Collectively they are the difference between the home you paid for and the home you got — and some (fire-stopping, ventilation, roof fixings) matter far more than they look.

When to inspect

Before legal completion is the strongest position, if the developer will grant access. Defects identified pre-completion can be tied to the completion process while your leverage is at its peak.

Shortly after completion is the most common timing. You control access, the property is empty or newly occupied, and the developer’s obligation to rectify is fresh.

Before the two-year mark is the last sensible window. Most new-build warranties place responsibility for general defects on the developer for the first two years; after that, cover typically narrows to major structural items only. A survey a few months before the deadline captures everything reportable while the developer is still on the hook.

What a professional snagging survey covers

A proper snagging inspection is systematic, not a walk-through with sticky notes:

• Externally: brickwork and pointing, roof coverings and flashings (from ground level, or by drone where appropriate), rainwater goods, drainage covers and gullies, paths, boundaries and garages.
• Internally, room by room: wall and ceiling finishes, joinery and doors, windows and their operation, staircases, kitchen and sanitaryware installation, visible plumbing, sockets and switches (visual), floor levels and finishes.
• Roof space: insulation coverage, ventilation ducting, water tanks and pipework, workmanship of visible structure.

The output is a photographed, itemised defect schedule formatted so the developer’s customer care team can work through it — and so nothing can be quietly dropped.

Getting defects fixed

A few practical points from the claims and contracting side of the industry:

1. Report in writing, once, comprehensively. A single professional schedule beats a stream of piecemeal emails. It creates one dated record of everything outstanding.
2. Keep the warranty provider in view. If the developer is slow or dismissive, most warranty schemes offer a resolution service in the first two years that depends on you having reported defects to the developer in writing.
3. Be reasonable about genuine tolerances. Materials shrink and hairline cracking in new plaster is normal. A credible schedule distinguishes defects from settling-in — which is exactly why professional judgement helps.
4. Re-inspect after rectification. Rectification work is itself work, and it is not always done well. A follow-up check closes the loop.

Is it worth the fee?

A snagging survey typically costs a few hundred pounds on a purchase of several hundred thousand. Set against missing insulation quietly inflating heating bills for years, a disconnected extractor duct filling a roof space with moisture, or the simple negotiating value of a professional defect schedule, it is one of the more asymmetric bets a new-build buyer can make.

The developer had professionals on their side of the transaction. There is no reason you shouldn’t have one on yours.