New build homes are sold with the promise of a fresh start — no chain, no surprises, and everything brand new. The reality is different. The average new build in the UK has between 150 and 200 defects at the point of legal completion. Most are minor. Some are not. Without a professional snagging survey, the majority go unreported, and once you're in, your leverage to get them fixed diminishes rapidly.
This guide explains what snagging is, when to do it, how much it costs, and precisely what to do if your developer drags their feet.
What Is a Snagging Survey?
A snagging survey is a thorough inspection of a newly built home to identify defects — known as snags — left by the builder before or after legal completion. The purpose is to compile a formal written record of every defect, from the cosmetic to the structural, so that the developer can be required to remedy them.
The term "snag" covers a wide spectrum:
Cosmetic snags:
- Misaligned doors and windows (won't close flush, rub on the frame)
- Unfinished or inconsistent grout lines in kitchens and bathrooms
- Scratched or damaged glass in windows and doors
- Paint holidays, drips, and roller marks
- Incomplete decoration (missed corners, bare patches near skirting)
- Damaged or poorly fitted skirting boards and architrave
Minor technical snags:
- Leaking or poorly sealed plumbing joints under sinks and baths
- Faulty or stiff window furniture and door handles
- Missing or incorrectly installed ventilation extract fans
- Ill-fitted kitchen units (doors not level, drawers that stick)
- Incomplete or incorrect caulking in wet rooms
Significant snags:
- Missing insulation around soil stacks and service penetrations (a common building regulations compliance failure)
- Cold bridges in the building fabric due to missing or incorrectly installed insulation
- Inadequate loft insulation depth or coverage
- Drainage falls too shallow or incorrectly directed
- Roof tiles cracked, slipped, or incorrectly fixed
- Structural cracking around openings
The distinction matters because significant snags — particularly those affecting building regulations compliance — must be prioritised and formally documented from the outset.
How Many Snags Should You Expect?
Research by professional snagging companies consistently finds that new builds average 150–200 snags, with significant variation:
| Build Type | Average Snag Count |
|---|---|
| Small apartment (1–2 bed) | 80–130 |
| Mid-size house (3 bed semi) | 120–180 |
| Large detached (4–5 bed) | 160–250+ |
| Converted or complex development | Can exceed 300 |
These figures reflect reality, not exceptional cases. Nationwide and volume housebuilders produce homes at pace, with multiple subcontractors rotating across multiple plots. Finishing trades — decorators, tilers, joiners — are often under time pressure and finishing multiple units simultaneously. Snags are the norm, not the exception.
When Should You Commission a Snagging Survey?
The ideal window is after legal completion but before you move your furniture in. An empty property gives the surveyor unobstructed access to every surface, floor, wall, and fitted item.
Many developers will claim that they cannot allow access before legal completion, citing insurance or health and safety reasons. This position is not legally sound — there is no law preventing a buyer commissioning an independent inspection of their own property prior to completion — but some developers will resist it in practice.
If you cannot gain pre-completion access, commission the survey on the day of legal completion or within the first two weeks. The sooner the snag list is in the developer's hands, the better.
Important timing context:
Under the NHBC Buildmark warranty (the most common warranty on new builds), you have 2 years in which the builder is responsible for fixing defects arising from failure to build to NHBC standards. After year 2 and up to year 10, the Buildmark insurance covers structural defects only. This means the builder's direct obligation to fix cosmetic and functional snags expires after two years — early and thorough snagging matters enormously.
Professional Snagging Survey vs DIY: Which Should You Choose?
You can produce your own snagging list. Whether you should depends on what's at stake.
| Factor | Professional Snagging | DIY Snagging |
|---|---|---|
| Cost | £300–£600 | Free |
| Snags typically identified | 150–200+ | 20–50 (average) |
| Technical defects (insulation, drainage) | Included | Often missed |
| Credibility with developer | High — independent report | Variable |
| Documentation quality | Formal report with photos | Informal list |
| Recommended for? | All new builds | Minor supplementary check only |
Professional snagging companies employ inspectors with backgrounds in building surveying or construction who know exactly what NHBC standards require and where builders commonly cut corners. The fee (typically £300–£600 for a 3-bed house) is almost always recovered through defect remediation — and the report's formal tone prompts a faster developer response than a handwritten list from the owner.
NHBC Buildmark Warranty Explained
The NHBC (National House Building Council) Buildmark warranty is not a substitute for a snagging survey — it is a complementary protection. Understanding the difference between the two phases:
Years 1–2 — Builder's Period: The builder is directly responsible for repairing or replacing anything that doesn't meet the NHBC's Technical Standards. This includes everything from sticking doors to significant structural issues. The builder must respond to complaints and complete remediation within a reasonable timeframe.
Years 3–10 — NHBC Insurance Period: The NHBC's insurance covers physical damage caused by a defect in the structure — foundations, load-bearing walls, roof structure. Cosmetic and functional defects are no longer covered. The builder's obligation has expired.
What Buildmark Does Not Cover:
- Normal shrinkage and settlement (hairline cracks, minor movement)
- Condensation caused by occupier lifestyle
- Fair wear and tear
- Anything the homeowner has modified or not maintained
The Consumer Code for Homebuilders runs alongside Buildmark and sets standards for the buying process — including how developers market homes, the quality of information provided before exchange, and the complaints process after moving in.
How to Formally Submit Your Snagging List
Process matters here. An informal WhatsApp message to the site manager will not create the paper trail you need.
Step 1: Produce a written snagging list — either your professional snagging report or your own structured list. Number each item. Include location (room, specific wall or fitting) and a brief description.
Step 2: Send it to the developer by email and/or post, addressed to the Customer Care or Aftercare department (not the site manager). Include the date, your plot number, and your contact details.
Step 3: Keep a copy of the list and the email/letter. Screenshot your sent items if sending by email. If sending by post, use Royal Mail Signed For.
Step 4: Request written acknowledgement of receipt and a timeline for remediation. A response within 14 days is reasonable for a standard snag list.
Step 5: When items are remedied, inspect each one and tick it off your master list. Do not mark an item as resolved until you are satisfied.
What to Do If the Developer Ignores Your Snag List
If the developer fails to respond or refuses to remedy legitimate defects, you have several escalation routes:
| Route | Description | Timeframe |
|---|---|---|
| NHBC Resolution Service | For homes with NHBC Buildmark — free service to resolve disputes between builder and buyer | Typically 6–12 weeks |
| Consumer Code for Homebuilders Adjudication Service | For issues during the buying process (pre-completion) | 4–8 weeks |
| CEDR (Centre for Effective Dispute Resolution) | Independent adjudication service for construction disputes | 8–16 weeks |
| New Homes Ombudsman Service (NHOS) | Independent ombudsman scheme for new build buyers; registered developers obliged to comply | 8–20 weeks |
| County Court (Small Claims / Fast Track) | For financial claims under £25,000 (Small Claims) | Variable; several months |
Before escalating, ensure you have a complete paper trail: the original snag list, proof of submission, developer responses (or lack thereof), and any photographic evidence of the defects.
The New Homes Ombudsman Service was established in 2022 and provides a free, independent service for new build buyers. Registered developers are legally required to comply with Ombudsman decisions — it is often the most effective route before resorting to legal action.
Don't Move In Without Your Snagging List Cleared
A new build purchase is often the largest transaction of your life. A £300–£600 snagging survey is one of the best investments you can make in protecting that asset. Renovate Me helps new build and renovation buyers understand every stage of property ownership — from snagging a new home to managing a full renovation project. Build your personalised property roadmap at renovate-me.madethis.app.
Related: New Build Snagging List UK: What to Check Before Legal Completion — a room-by-room snagging checklist, the NHBC Buildmark two-phase warranty structure, and how to escalate to the New Homes Ombudsman if the developer won't act.