Introduction
Buying a new-build home should mean a property finished to a high standard, free from the wear and tear of an older property. In reality, even the best builders work to tight schedules, and finishing work is often rushed in the final days before you collect your keys. The result is that most new homes contain a list of small defects — snags — that are quick to fix but easy to miss if you do not inspect methodically.
This guide is the UK’s complete new build snagging checklist. It takes you through every room and external area, explains what to look for, and gives you a free printable checklist you can take with you on the day. Whether you are a first-time buyer collecting the keys to your first home or a seasoned mover who wants to protect your investment, this page is designed to give you a professional-grade inspection process.
A snagging inspection is your opportunity to hold your developer to account while every trade is still on site and issues are cheap to fix. Used properly, the checklist on this page will help you build a clear, evidence-backed report that your builder is far more likely to action quickly. To understand the wider context, our guide to what snagging actually is is a good place to start.
Why This Matters
New-build homes are sold on the promise of a finished, warranty-backed product. Yet research by the Home Builders Federation and consumer bodies repeatedly shows that the majority of new-build buyers find defects within the first few months of ownership. Left unrecorded, those defects become your problem rather than the builder’s.
The financial case is straightforward. A chip in a kitchen worktop, a leaking radiator valve or a cracked roof tile is quick and inexpensive for a developer to repair while the relevant trade is still on site. Months later, after you have moved in and the team has moved on, the same issue becomes a warranty claim, a phone call to customer care, and a wait — often with real cost and inconvenience along the way.
There is a legal dimension too. Under the Consumer Code for Home Builders and your NHBC or equivalent warranty, developers are obliged to rectify genuine defects. But the burden of evidence falls on you. A clear, dated, photo-supported snagging list is the document that makes that obligation enforceable. Our guide to new build warranty defects explains exactly what is covered and when.
The Complete Snagging Guide
A good snagging inspection is methodical rather than rushed. The most reliable approach is to work through the property in a fixed order — outside first, then top to bottom inside — so that no area is missed. This mirrors the way a professional independent inspector works and the way our snagging inspection tips are structured.
Before you arrive
Prepare before the day itself. Read your sales specification and your developer’s snagging policy so you know what is agreed and what is not. Pack a phone charger to test sockets, a small torch for loft and cupboard spaces, a notepad, and a snagging app such as Snagr that lets you photograph and log defects as you go. If you can, arrange your inspection for a bright dry day — natural light is the single best tool you have for spotting defects.
Inspecting room by room
Move through the home in a logical order. Start with the exterior and roof, work around the structure, then move inside from the top floor down. In each room, work systematically: ceiling, walls, floors, joinery, fixtures, fittings, electrics and plumbing. The checklist further down this page is organised in exactly this order so you can simply work top to bottom.
For every defect, take at least one clear photograph, note the exact room and location, and add a short description. This is where a dedicated app makes a real difference: instead of a pile of disconnected photos and scribbled notes, you end up with a structured report you can hand straight to your developer. Our guide on how to write a snagging report covers the format in detail.
Understanding severity
Not every snag is equal, and the best reports group issues by severity so your builder can prioritise. The table below is a simple framework you can apply to every item you find.
| Severity | Priority | Who fixes it | Expected repair time | Example |
|---|---|---|---|---|
| Cosmetic | Low | Builder / decorator | 1–7 days | Scratches, paint splashes, minor chip |
| Finishing | Medium | Site team / relevant trade | 7–14 days | Misaligned units, poor sealant, loose fitting |
| Functional | High | Qualified trade | 14–28 days | Leaking pipe, faulty socket, door not latching |
| Safety / compliance | Critical | Builder + certification | Immediate | Smoke alarm failure, structural crack, unsafe stair |
Safety and compliance issues — such as a failed smoke alarm or a structural crack — should be flagged immediately and separately from cosmetic snags. If you want a deeper understanding of what builders must put right, our NHBC standards guide is the companion read.
Professional Snagging Checklist
Work through each section methodically, tick items off as you check them, and export a clean printable PDF to take with you on the day.
Exterior & Structure
Walk around the entire perimeter before going inside. Exterior defects are easiest to spot in dry, bright daylight.
Roof
You can usually view most of the roof safely from ground level using binoculars or by standing back across the road.
Brickwork & Masonry
Windows & External Doors
Test trickle vents — they should open and close cleanly and help meet ventilation Building Regulations.
Internal Doors
Kitchen
Run the tap for a few minutes and check the cupboard below for any sign of leaks.
Bathrooms & En Suites
A poorly sealed bath or shower is one of the most common and costly new-build defects. Check silicone joints carefully.
Bedrooms
Living Areas & Hallways
Staircases
Building Regulations require stair balustrades to be at least 900mm high where a drop exceeds 600mm.
Flooring
Heating & Plumbing
Builders must provide a completed Boiler Benchmark commissioning record for your warranty and any future servicing.
Electrical
Your developer should hand over an Electrical Installation Certificate (EIC) — keep it safe for warranty and insurance.
Decoration
Garage & Outbuildings
Garden & Driveway
Garden levels and drainage should fall away from the property. Standing water near the foundation is a red flag.
Loft
Current Building Regulations require around 270mm to 300mm of loft insulation in most new homes.
Safety & Compliance
Keep every certificate — NHBC, Building Regs, electrical, boiler and Glazing — together in one file for warranty claims and resale.
Common Problems Homeowners Miss
Even careful buyers miss certain defects because they are hidden, technical or simply unfamiliar. The issues below come up again and again in our readers’ reports and are worth checking twice.
- Failed double-glazed seals showing as fogging between the panes, often only visible in certain light.
- Silicone sealant gaps around baths and showers that only reveal themselves as water damage weeks later.
- Loose radiator valves and un-bled radiators that leave cold spots across a room.
- Missing or unlabelled circuits at the consumer unit, making future electrical work harder and more expensive.
- Weep holes blocked by mortar, which can cause damp within cavity walls.
- Garden and driveway levels that fall towards the house rather than away from it.
- Loft insulation below current standards, quietly pushing up heating bills.
- Smoke and heat detectors that look fine but fail the test-button check.
For a broader list of defects by room, our companion page on common new build defects goes into more detail on each category and what to do about it.
Expert Advice for a Better Inspection
The difference between an average snagging inspection and a great one is almost always process. The best inspectors are not necessarily the most knowledgeable — they are the most systematic. The advice below is what separates a report that gets actioned from one that gets filed and forgotten.
Inspect in daylight
Natural light reveals paint defects, plaster imperfections and surface scratches far more clearly than artificial light. Revisit rooms in the evening to confirm what you found.
Use a phone charger to test every socket
A faceplate can look perfect while the wiring behind it is faulty. A two-second test at every point catches issues that are easy to miss.
Run every tap and check below
Turn hot and cold on at every basin, bath and shower, then check the cupboard and floor below for any sign of moisture.
Open and close every door and window
Test latches, locks and trickle vents. Poorly fitted windows and doors cause draughts and security issues if left uncorrected.
Keep your report visual
A photograph with a location label is worth pages of description. Apps like Snagr attach photos directly to each defect so nothing gets lost.
Record exact locations
Note the room and the specific wall or surface. “Kitchen, west wall, first tile left of sink” is far more useful to a trade than “tile loose in kitchen”.
Submit your report in writing
A dated, written report creates a clear paper trail for your warranty. Keep a copy for yourself and chase politely but persistently.
From Checklist to Action: Reporting Your Snags
A checklist is only useful if the defects you find actually get fixed. Once your inspection is complete, your next step is to turn your notes into a report and submit it to your developer’s customer care or site manager. The clearer and more organised that report is, the faster and more completely your snags will be resolved.
A professional report lists each defect with its room and location, a short description, a severity category and a supporting photograph. It is dated and includes your name, plot and contact details. Our page on how to report snags to your builder includes a template you can follow, and our guide to snagging versus surveying explains how a snagging inspection differs from a full building survey.
If your developer is slow to respond, you have a clear escalation path: their internal complaints procedure, your NHBC or equivalent warranty provider, and ultimately the Consumer Code for Home Builders. The same evidence that supports your initial report supports each of those stages. Builders also vary — many of the major UK housebuilders have known common issues, which is why we are building dedicated guides such as our housebuilders hub and specific pages including the Taylor Wimpey guide.
Frequently Asked Questions
Summary
A new build snagging checklist is the single most effective tool a buyer has for protecting their investment. Done properly, it turns a nerve-wracking handover day into a structured, evidence-backed process that holds your developer to their obligations while every trade is still on site and fixes are cheap.
Work methodically, inspect in daylight, photograph every defect, and submit a clear written report within your builder’s snagging period. Keep every warranty certificate, Building Regulations document and electrical certificate safe — together, they are your protection for the next two years and beyond.
Use the checklist on this page as your starting point, export the printable PDF, and pair it with a snagging app to capture evidence as you go. Done right, the hour or two you spend inspecting now will save you weeks of chasing later.
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Related Snagr guides to help you inspect and protect your new-build home.
Common New Build Defects
The most frequently reported defects in UK new-build homes and how to spot them before they become costly.
Read GuideHow to Report Snags to Your Builder
A step-by-step process for submitting a snagging report your developer cannot ignore.
Read GuideNHBC Standards Guide
What the NHBC warranty actually covers, how to claim, and the deadlines that catch homeowners out.
Read GuideTop 50 New Build Defects Checklist
Our room-by-room breakdown of the 50 most common new-build defects to check for.
Read GuideHow to Write a Snagging Report
How to structure a professional snagging report that gets results from your developer.
Read GuideNew Build Warranty Defects
Understanding your warranty periods and which defects are covered at each stage.
Read GuideWhat Is Snagging?
Everything a first-time buyer needs to know about snagging and why it matters.
Read GuideSnagging Inspection Tips
Practical tips from professional inspectors to help you spot defects most buyers miss.
Read Guide