The New Build Snagging Period Explained: Deadlines and Who's Responsible

The new build snagging period is the window of time after you buy a new home in which the developer is responsible for putting right defects in their work, at no cost to you. There is no single legal "snagging period" with one fixed deadline - instead there are several overlapping timeframes that matter, and the right answer to "how long do I have to snag?" depends on the type of defect and on your own warranty and reservation documents. In broad terms, though, the most important window is the first two years from legal completion, often called the builder period or defects period. That is when the developer, not your warranty provider, is on the hook to fix the widest range of snags. This guide explains each of the timeframes in plain English, who is responsible at each stage, and the honest line between a genuine snag and normal wear and tear.

A quick, honest note before we start. The exact deadlines vary by builder, by warranty provider and by which consumer code your developer signed up to, and they can change over time. Treat the timeframes here as the typical shape of things, not a fixed rulebook, and always check your own reservation agreement and warranty documents for the figures that actually apply to your home. For the full detail on warranties, codes and the New Homes Ombudsman, read your new build rights.

What is the snagging period?

The snagging period is simply the time during which you can report defects in a new build and expect the developer to fix them for free. A "snag" is any defect or unfinished bit of work that fell short of the standard the home was meant to be built to: a door that does not close cleanly, a cracked tile, a radiator that will not heat, poor paintwork, a window that sticks. Snagging is the act of finding those faults and reporting them, and the snagging period is the window in which doing so makes the developer responsible for the repair.

It helps to know that "snagging period" is an everyday phrase rather than a single legal term. People use it loosely to mean a few different things:

• The early window after you get the keys, when you are expected to flag cosmetic items quickly.
• The wider two-year builder period during which most defects are the developer's problem.
• Occasionally, the whole warranty span up to ten years - though that last stretch only covers major structural matters, not ordinary snags.

Because the phrase covers all of those, the useful thing is not to argue about the label but to understand the actual timeframes underneath it. That is what the rest of this guide does. If you are new to the whole concept, our plain-English guide to what snagging is is a gentler starting point, and new build snagging explained walks through the full process end to end.

The key timeframes (and why there's no single deadline)

There are four moments or windows worth understanding. They overlap, and not all of them apply to every buyer, but together they map out when you can and should snag.

1. The pre-completion inspection (before you own it)

The earliest chance to snag is before you legally complete, during a pre-completion inspection (sometimes called a home tour, home demonstration or PCI). If your developer is signed up to the New Homes Quality Code, you generally have the right to inspect the finished home - yourself or through a professional acting for you - before handover.

This is the strongest moment to snag, because anything you log while the home is still being handed over is hard for the developer to blame on you later. A professional pre-completion snagging survey is usually booked a week or two before your completion date. There is no obligation to use this window, but if it is offered, take it.

2. The early reporting window (the first days after completion)

This is the timeframe most people mean when they ask about a "snagging deadline", and it is also the one most often misunderstood. There is a widely cited convention that cosmetic snags - paint nicks, marks, minor finish issues - should be reported very soon after you get your keys, often quoted as within the first seven days.

It is worth being precise and honest about this. The seven-day figure originates as an NHBC recommendation, not a law, and it applies mainly to cosmetic items rather than to all defects. In practice, builders set their own policies: some reference seven days, some less, some longer, and the period that binds you is the one written into your handover paperwork, not a number from a general guide. The reason the early window matters is practical rather than legal - a fresh scuff or mark is much easier to get fixed before there is any argument about whether you caused it while moving in.

3. The two-year builder (defects) period

This is the big one. For roughly the first two years from your legal completion date, the developer who built the home is responsible for putting right defects that fall short of the warranty provider's standards. NHBC, for example, describes the builder warranty period as usually two years from the start date on your policy, and is clear that during it "the builder, not NHBC, is responsible for rectifying problems" that arise from the builder failing to meet its requirements.

Most ordinary snags live here: sticking doors, leaks, faulty heating, poor finish, drainage that does not drain. Functional and build defects that you could not reasonably have spotted on day one are still the developer's responsibility if they show up within this period - you are not limited to what you found in the first week. The widely repeated practical advice is to get your main snag list to the builder within the first couple of months (partly because it lines up with the timing of the industry's new-homeowner satisfaction survey, when site teams tend to be most responsive), but the underlying two-year cover runs the full period.

4. The structural period (years three to ten)

After the builder period, cover continues but narrows sharply. From around year three to year ten, a new home warranty (such as NHBC Buildmark or another provider's equivalent) typically covers only major structural problems - things like foundations, load-bearing walls and the roof structure - and the warranty provider, rather than the builder, handles valid claims. Everyday cosmetic and minor functional snags are generally not covered this far out.

So while people sometimes loosely call the whole ten years a "snagging period", that is not really accurate. Snagging - in the sense of getting the developer to finish and fix the broad range of small defects - belongs to the two-year builder period. We cover the full ten-year structure, the warranty providers and the escalation routes in depth in your new build rights, so this guide keeps it brief.

Who is responsible at each stage?

The short answer for almost all snagging is: the developer who built your home. But it is worth being clear about how responsibility shifts across the timeframes above.

• Before and at handover: the developer is finishing the home to the agreed standard. Anything not up to scratch is theirs to put right.
• During the two-year builder period: the developer is responsible for fixing defects that fall short of the warranty standards, at no cost to you. The warranty provider sits behind them as a backstop - for example, NHBC guarantees the builder's obligations - but in normal circumstances it is the developer who arranges and pays for the repairs. You do not pay tradespeople, and you do not claim on your own home insurance, for genuine new-build defects.
• In the structural period (years three to ten): responsibility for the narrow set of major structural defects shifts to the warranty provider, and claims go to them rather than the builder.

One thing that stays constant across all of it: you do not fix genuine defects yourself. Doing so can muddy who was responsible and undermine your position. The job is to report clearly and keep polite pressure on, not to reach for the filler. If your developer goes quiet, there is a proper escalation path, which we set out in how to get your developer to fix your snags.

Snag vs wear and tear vs maintenance

This is the part that catches buyers out, and being honest about it will save you a lot of frustration. The snagging period covers defects in the build - things that were wrong when the home was handed over, or that arise from the builder failing to meet the required standards. It does not cover normal wear and tear, damage you cause after moving in, or the routine maintenance and "settling in" that comes with any new home. Developers will fairly push back on anything that is clearly down to everyday use, the weather, or the house simply drying out, and a snag list cluttered with those items carries less weight.

Here is the honest distinction, with examples.

What is usually a genuine snag (developer's responsibility)

• Doors and windows that do not close, lock or seal properly.
• Leaks, plumbing faults, or heating and hot water that does not work.
• Electrical faults, dead sockets, switches or fans.
• Cracked or chipped tiles, badly fitted units, poor or missing sealant.
• Paintwork that does not cover, visible defects in finish, gaps in joinery beyond the normal.
• Anything that does not meet the warranty provider's technical standards.

What is usually NOT a snag (wear, maintenance or settling)

• Shrinkage cracks. New homes dry out over their first year or two, and fine cracks in plaster and small gaps in joinery are extremely common as that happens. These are generally treated as normal drying-out rather than a defect. The usual advice is to leave them for a few months until the home has settled, then fill and redecorate as part of ordinary maintenance.
• Condensation and the resulting mould. Unless it stems from a genuine construction fault (such as inadequate ventilation that was meant to be there), condensation is usually down to how the home is heated and ventilated, and is the homeowner's to manage. New homes hold a lot of moisture early on, so airing and heating them sensibly matters.
• Normal wear and tear. Everyday use, scuffs and ageing are not defects.
• Damage you cause after moving in. Knocks, spills and DIY mishaps are yours.
• Routine maintenance and weather effects. Reapplying sealant over time, clearing gutters, and dealing with normal weathering are part of owning a home, not snags.

What to do and when

Pulling the timeframes together into a simple sequence:

1. Snag at the pre-completion inspection if you can. Use any pre-completion access or home tour to log defects before you own the home. This is the strongest moment.
2. Do a thorough snag in the first days. Once you have the keys, walk the home methodically in good light, run and open everything, and record each defect with a photo, a location and a date. Report cosmetic items promptly, within whatever early window your handover documents specify.
3. Get your main list to the developer early. Aim to send a tidy, written, evidenced snag list within the first weeks rather than letting it drift - it is when site teams are most responsive, and it creates a clear, dated record.
4. Keep reporting through the two-year builder period. Do not assume your one list is the end of it. New faults surface as you live in the home and run it through heating and weather. Report each one in writing as you find it, well inside the two-year window.
5. Leave drying-out items to settle, then maintain. Hold off on shrinkage cracks and similar for several months, then deal with them as ordinary maintenance rather than expecting the developer to.

What happens if you miss a window?

It depends entirely on what you missed, and it is rarely as final as people fear.

If you miss the early cosmetic window, you have not necessarily lost the right to a fix, but you have made it easier for the developer to question whether a mark was there at handover or caused by you afterwards. The defect may still get sorted, but the argument gets harder. This is why reporting cosmetic items quickly, and dating your evidence, matters so much.

If a functional or build defect appears after the early window but still inside the two-year builder period, you are generally fine. These are covered through the builder period regardless of whether you spotted them in week one, precisely because many only reveal themselves with use. Report them in writing as soon as you notice them.

If you let the two-year builder period lapse without reporting a defect that should have been raised, that is more serious - the broad cover for ordinary snags is tied to that window, and after it the warranty narrows to major structural matters only. The lesson is not to sit on known defects.

In all cases, the deadlines and the consequences of missing them vary by warranty provider and code, and there are also separate time limits on escalating a complaint to a warranty provider's resolution service or the New Homes Ombudsman. Do not rely on a single figure from any general guide, including this one. Check the live rules and your own documents, and act in good time. We explain the escalation routes and their deadlines in your new build rights.

Frequently asked questions

How long is the new build snagging period?

There is no single fixed deadline. The most important window is the two-year builder (defects) period from legal completion, during which the developer is responsible for fixing the broad range of snags. Separately, cosmetic items are best reported in the early window after you get the keys (often quoted as around seven days, but this varies by builder), and a narrower warranty covers major structural problems up to around ten years. Always check your own warranty and reservation documents for the figures that apply to your home.

Do I have to report all my snags within seven days?

No. The seven-day figure is a widely repeated NHBC recommendation that applies mainly to cosmetic items, and individual builders set their own policies. Functional and build defects are generally covered through the two-year builder period, so you can report those as they appear. Report cosmetic marks promptly to avoid any argument about who caused them, and check your handover paperwork for your builder's actual policy.

Who is responsible for fixing snags during the snagging period?

In almost all cases, the developer who built your home. During the two-year builder period, genuine defects are theirs to fix at no cost to you. The warranty provider sits behind them as a backstop, and from around year three to ten takes over responsibility for the narrower set of major structural defects. You should not be paying tradespeople or claiming on your own insurance for genuine new-build defects.

Are shrinkage cracks a snag the developer has to fix?

Usually not. Fine cracks in plaster and small gaps in joinery are a normal part of a new home drying out, and are generally treated as maintenance rather than a defect. The common advice is to leave them for a few months until the home has settled, then fill and redecorate. They are typically excluded from warranty cover, so check your own documents. Larger or structural cracking is a different matter and should be reported.

What if I find a defect after two years?

After the two-year builder period, cover narrows to major structural problems handled by your warranty provider, generally up to around ten years from completion. Ordinary cosmetic and minor functional snags are usually no longer covered, which is why reporting them inside the builder period matters. If you think you have a serious structural defect, contact your warranty provider and check your policy for the claims process and deadlines.

The bottom line

The new build snagging period is not one deadline but a set of overlapping windows. The early days after completion are when you should flag cosmetic items, before anyone can argue about who caused a mark. The two-year builder period is the main event - the window in which the developer is responsible for putting right the broadest range of defects, and the one worth protecting by reporting faults in writing as you find them. The years that follow narrow to major structural cover only. And running underneath all of it is the honest line between a genuine snag and normal wear, settling or maintenance, which is worth respecting if you want your list taken seriously.

Get the timing right, keep dated and photographed evidence, and respect the difference between a defect and ordinary settling, and the system works in your favour. If you are buying or have just moved into a new build, the buyer-focused walkthrough at for new build buyers ties this together, and SnagPal is a free, offline, no-account iOS app that turns your photos and notes into a dated, developer-ready PDF inside the window that matters.