Legal Rights During the New Build Defect Liability Period

What Is the Defect Liability Period?

The defect liability period (sometimes called the defects rectification period or defects warranty period) is a contractually defined window – typically lasting two years from the date of legal completion – during which the developer of your new build home is directly obligated to return and rectify any defects that emerge after you move in. This period is one of the most important protections available to new build buyers and is a standard feature of virtually all new build purchase contracts in England & Wales.

During this period, the developer bears primary responsibility for fixing problems with your home. This is distinct from (and in addition to) the structural warranty provided by a warranty provider such as the NHBC under the Buildmark warranty scheme, which typically covers your home for a total of ten years but has different coverage at different stages. The defect liability period represents the phase where the developer’s direct obligations are at their strongest, and your ability to get issues resolved is at its most straightforward.

Understanding the defect liability period is essential because it determines the window within which you should identify and report problems. Once the period expires, your options for compelling the developer to carry out repairs become more limited (though not eliminated entirely). Many buyers on new build estates fail to report defects promptly or thoroughly, losing the opportunity to have issues resolved while the developer’s contractual obligation is at its clearest.

The concept of a defect liability period is not unique to residential property – it is a well-established principle in construction law more broadly. In the commercial sector, the JCT (Joint Contracts Tribunal) suite of contracts uses similar mechanisms. For residential new builds, the obligation typically arises from a combination of the purchase contract, any collateral warranties, and the requirements of the relevant warranty scheme. The developer’s obligations are also reinforced by the Consumer Code for Home Builders, which sets standards for how developers should handle after-sales service and defect resolution.

Developer’s Obligations During the Defect Liability Period

During the defect liability period, the developer has a clear legal and contractual obligation to return to your property and rectify defects that fall within the scope of the warranty. Understanding exactly what the developer must do – and the standards they must meet – helps you hold them accountable and ensures you get the quality of workmanship you paid for.

Scope of the Developer’s Obligations

The developer’s obligations during the defect liability period generally include:

• Rectifying construction defects: Any issues arising from poor workmanship, defective materials, or non-compliance with building regulations that become apparent after completion
• Addressing items identified during snagging: While the initial snagging inspection should ideally take place before legal completion, defects missed during the initial inspection remain the developer’s responsibility during the liability period
• Responding within reasonable timeframes: The Consumer Code for Home Builders requires developers to have a documented after-sales service procedure and to respond to reported defects promptly. While “promptly” is not defined to a specific number of days, a reasonable benchmark is acknowledgement within 5 working days and inspection/repair within 28 days for non-urgent issues
• Completing repairs to a satisfactory standard: Repairs must address the underlying defect, not merely provide a cosmetic fix. The repair should meet the same quality standards as the original construction specification
• Covering the cost of repairs: During the defect liability period, the cost of rectifying genuine defects lies with the developer, not the homeowner. You should not be asked to pay for repairs to construction defects

What the Developer’s Obligations Do Not Cover

It is equally important to understand the limits of the developer’s obligations. The defect liability period does not generally cover:

• Normal wear and tear, including minor shrinkage cracks in plaster as the building settles
• Damage caused by the homeowner (e.g., damage from DIY works, failure to maintain heating systems, or damage from moving furniture)
• Issues arising from the homeowner’s failure to follow the developer’s maintenance instructions (for example, failing to ventilate the property adequately, leading to condensation and mould)
• Modifications or alterations carried out by the homeowner or third parties after completion
• Items that were identified and noted at the point of sale as not being part of the developer’s specification

The line between a genuine construction defect and normal settlement or homeowner-caused damage can sometimes be blurred. This is where proper documentation becomes crucial, as discussed in a later section of this guide. For a broader overview of what warranties cover, see our guide to new build warranties explained.

How to Report Defects Effectively

The way you report defects can significantly affect how quickly and thoroughly they are resolved. A clear, well-documented report gives the developer no room for ambiguity and creates a paper trail that can be invaluable if disputes arise later. Follow this structured approach to maximise your chances of a satisfactory resolution.

Reporting Process: Step by Step

1. Identify and document: As soon as you notice a defect, photograph it from multiple angles with good lighting. Include a ruler or coin for scale where relevant. Note the date, the exact location within the property, and a description of the problem
2. Check your home user guide: The developer should have provided a home user guide or homeowner’s manual at completion. Check whether the issue is addressed in the guide (for example, guidance on minor shrinkage cracks) before reporting
3. Use the developer’s reporting system: Most developers have a dedicated after-sales or customer care team with a specific reporting mechanism (online portal, email address, or phone number). Use the official channel to ensure your report enters their system
4. Report in writing: Even if you report by phone, follow up immediately with written confirmation (email is usually sufficient) including your photographs and description. Written records are essential evidence if the matter escalates
5. Keep copies of all correspondence: Save every email, letter, and note of telephone conversations relating to defect reports. Note the date, time, the person you spoke to, and what was discussed or agreed
6. Set a reasonable deadline: In your written report, request that the developer acknowledge the defect within a specified period (e.g., 7 working days) and provide a timeline for repair
7. Follow up systematically: If you do not receive a response within your stated timeframe, send a follow-up communication referencing your original report and the date it was submitted

Template for Reporting a Defect

Your defect report should include the following information:

Keeping a defect log – a running record of all defects identified, when they were reported, and the developer’s response – is strongly recommended. This log becomes invaluable if you need to escalate matters to the warranty provider or take legal action. For guidance on what to look for during your initial inspection, see our detailed new build snagging checklist.

What’s Covered vs What’s Not Covered

One of the most common sources of frustration for new build homeowners is confusion over what falls within the scope of the defect liability period and what does not. The following table provides a detailed breakdown to help you understand where the boundaries typically lie.

If there is any dispute about whether a defect falls within the scope of the liability period, your warranty provider (such as the NHBC) may be able to assist with an independent assessment. You can also commission an independent snagging surveyor or building surveyor to provide an expert opinion. Their report can be powerful evidence if you need to escalate a complaint.

Snagging Defects vs Structural Defects: Key Differences

Not all defects in a new build home are equal, and the distinction between snagging items and structural defects has significant implications for your legal rights, the remedies available to you, and the urgency with which issues should be addressed.

Snagging Defects

Snagging refers to minor cosmetic or functional issues that do not affect the structural integrity of the building. These are the kinds of problems that are common in virtually all new build homes and are generally the result of the fast-paced nature of modern construction. Examples include:

• Poorly finished paintwork, including brush marks, runs, or uneven coverage
• Minor gaps in sealant around baths, showers, or worktops
• Doors or windows that need adjustment to close properly
• Scratched glass, chipped tiles, or damaged worktops
• Incomplete or poorly fitted skirting boards, architraves, or trims
• Missing or loose fixings (handles, hooks, towel rails)
• Minor plaster imperfections visible under raking light

Snagging defects should be identified and reported as early as possible – ideally during a pre-completion inspection if the developer permits one, and certainly within the first few weeks of moving in. The developer is obligated to rectify these items during the defect liability period. For a comprehensive approach to identifying snagging issues, see our complete guide to snagging a new build.

Structural Defects

Structural defects are far more serious and affect the physical integrity, stability, or weatherproofing of the building. These are the kinds of problems that can make a property unsafe or unfit for habitation and typically require significant remedial work. Examples include:

• Subsidence or foundation failure
• Structural cracking in load-bearing walls (cracks wider than 2–3mm, diagonal cracks following mortar joints, or cracks accompanied by displacement)
• Roof structural failure or defective roof trusses
• Defective damp-proof course allowing rising damp
• Failed cavity wall insulation causing thermal bridging and damp penetration
• Defective floor joists or beams causing excessive deflection
• Non-compliance with Building Regulations affecting structural safety

Structural defects are covered not only during the defect liability period but also under the longer-term structural warranty (typically years 3–10 of a Buildmark or equivalent policy). During the first two years, the developer is directly responsible. After the defect liability period expires, structural defect claims are made against the warranty provider rather than the developer. This makes it even more important to identify and report structural concerns as early as possible while the developer’s direct obligation is in force.

If you suspect a structural defect, you should report it to the developer immediately, but also notify your warranty provider and consider commissioning an independent structural engineer’s report. This dual approach protects your position under both the contractual defect liability period and the structural warranty.

The Consumer Code & Legal Remedies If the Developer Won’t Fix Issues

If the developer fails to rectify defects within a reasonable time during the defect liability period, you are not without recourse. Several legal and quasi-legal mechanisms are available to compel action or obtain compensation.

The Consumer Code for Home Builders

The Consumer Code for Home Builders (CCHB) is an industry-led code of conduct that most major developers are signed up to. It sets out requirements for pre-purchase information, the sales process, and after-sales customer service. Key provisions relevant to the defect liability period include:

1. Developers must have a published after-sales service procedure, including timescales for responding to reported defects
2. Developers must provide a procedure for resolving complaints and disputes, including access to an independent dispute resolution scheme
3. Developers must not use unreasonable delays or bureaucratic processes to avoid rectifying legitimate defects
4. If the developer fails to meet the Code’s standards, homeowners can refer the matter to the independent dispute resolution service operated by the Centre for Effective Dispute Resolution (CEDR) or the relevant ombudsman

The dispute resolution service can make awards of up to £50,000, and developers who are signed up to the Code are bound by the adjudicator’s decision. For more detail on how the Code protects buyers, see our dedicated guide to the Consumer Code and buyer rights.

Warranty Provider Intervention

If the developer is unresponsive or refuses to carry out repairs, your warranty provider may be able to intervene during the defect liability period. Under the NHBC Buildmark scheme, for example, the NHBC operates a Resolution Service that can investigate disputes between homeowners and builders during the first two years. If the NHBC determines that the builder has failed to meet its obligations, it can direct the builder to carry out repairs and, as a last resort, arrange for the repairs to be carried out using the builder’s deposit held by the NHBC.

Legal Action

If other avenues have been exhausted, you have the right to pursue legal action against the developer through the courts. Possible claims include:

• Breach of contract: The purchase contract typically contains express or implied terms about the standard of workmanship and materials. Failure to rectify defects may constitute a breach
• Breach of statutory duty: Under the Defective Premises Act 1972, any person who takes on work in connection with the provision of a dwelling owes a duty to ensure that the work is done in a workmanlike manner, with proper materials, so that the dwelling is fit for habitation. This duty applies for six years from completion (extended to 15 years by the Building Safety Act 2022 for claims brought after 28 June 2022)
• Consumer Rights Act 2015: As a consumer purchasing goods and services from a trader, you benefit from protections under the Consumer Rights Act, including the right to have services carried out with reasonable care and skill
• Misrepresentation: If the developer made specific representations about the quality or specification of the property that turn out to be inaccurate, a claim for misrepresentation may be available

Before pursuing litigation, consider the costs involved and whether alternative dispute resolution (mediation or the CCHB dispute resolution service) might achieve a satisfactory outcome more quickly and at lower cost. For detailed guidance on your legal position when things go wrong with a new build, see our guide to your legal rights when new build completion is delayed.

Documenting Defects Properly: Building Your Evidence

Thorough documentation is the foundation of any successful defect claim. Whether you are simply requesting that the developer carry out repairs during the liability period or pursuing a formal legal claim, the quality of your evidence will be a decisive factor. Here is a comprehensive guide to building a robust evidence file.

Essential Documentation Practices

• Photographic evidence: Take dated photographs of every defect from multiple angles. Include close-up shots showing the nature and severity of the problem, and wider shots showing the location within the room or property. Include a ruler or other object for scale where cracks, gaps, or other measurable defects are involved
• Video evidence: For defects that are better demonstrated through movement (e.g., a door that won’t close, water flowing in the wrong direction, a squeaking floor), video recordings are more effective than photographs
• Written log: Maintain a chronological log of all defects, when they were first noticed, when they were reported, and the developer’s response. Update this log regularly
• Correspondence file: Keep all emails, letters, text messages, and notes of telephone conversations in a dedicated file. For phone calls, note the date, time, who you spoke to, and what was said
• Independent reports: If the defect is significant, commission an independent professional (snagging surveyor, building surveyor, or structural engineer) to prepare a written report. Independent expert evidence carries substantial weight in dispute resolution proceedings and court
• Weather records: For defects related to water ingress, dampness, or drainage, keep records of weather conditions when the problem occurs (heavy rain, frost, etc.). The Met Office provides historical weather data that can support your case
• Financial records: If defects have caused you financial loss (e.g., damage to personal belongings, temporary accommodation costs, costs of emergency repairs), keep all receipts and invoices. These form the basis of any claim for damages

The Limitation Act 1980 sets time limits for bringing legal claims. For breach of contract, the limitation period is six years from the date of the breach (i.e., from completion). For claims under the Defective Premises Act 1972 (as extended by the Building Safety Act 2022), the period is now 15 years for retrospective claims and ongoing claims. Ensuring your documentation is thorough from the outset protects your ability to bring a claim even after the defect liability period has expired.

Note for Scotland and Northern Ireland: The limitation periods differ. In Scotland, the prescriptive period for breach of contract is generally five years under the Prescription and Limitation (Scotland) Act 1973. In Northern Ireland, the Limitation (Northern Ireland) Order 1989 sets similar periods to England & Wales but with some procedural differences. Consult a solicitor in the relevant jurisdiction for specific advice.

Frequently Asked Questions

Does the defect liability period start from exchange of contracts or legal completion?

The defect liability period typically starts from the date of legal completion (the date you receive the keys and ownership transfers to you), not from exchange of contracts. The exact start date should be specified in your purchase contract. If there is any ambiguity, ask your solicitor to confirm. On some developments where phased completion occurs, different parts of the property may have different start dates – for example, if an attached garage or external landscaping was completed after you moved in.

Can I withhold the final payment or retention if defects are not fixed?

In most standard new build purchase contracts, the full purchase price is payable on completion, and there is no provision for retaining a portion against defects. However, some bespoke contracts or self-build arrangements may include retention provisions. If significant defects are identified before completion, you should discuss with your solicitor whether to proceed with completion, negotiate a price reduction, or seek a formal undertaking from the developer to carry out repairs by a specified date. See our guide to new build contracts for more information.

What if the developer goes into administration during the defect liability period?

If the developer becomes insolvent during the defect liability period, your ability to enforce their contractual repair obligations is significantly compromised. This is where your structural warranty becomes critically important. Under the NHBC Buildmark scheme (and most equivalent warranties), the warranty provider steps in to cover defects that the builder can no longer rectify. However, the scope of warranty cover may be narrower than the developer’s contractual obligations, particularly for cosmetic or non-structural defects. This is one reason why choosing a reputable developer matters.

Can I commission my own repairs and claim the cost back from the developer?

Generally, you should give the developer a reasonable opportunity to inspect and rectify the defect before commissioning your own repairs. If you carry out repairs without giving the developer the chance to do so, they may argue that they have been denied the opportunity to mitigate costs, which could weaken your legal position. However, if the developer has failed to respond within a reasonable time, or the defect is causing ongoing damage or a health and safety risk, you may be justified in commissioning emergency repairs and claiming the cost back. Always seek legal advice before taking this step, and document the developer’s failure to respond.

Are communal areas on the estate covered by the defect liability period?

Yes, communal areas (roads, pathways, landscaping, drainage, play areas) are generally subject to the same defect liability provisions as individual properties. However, responsibility for reporting and pursuing defects in communal areas may rest with the estate’s management company rather than individual homeowners. Check whether the management company is actively monitoring and reporting communal defects, and raise concerns if it is not.

Conclusion: Protecting Your Investment

The defect liability period is your most direct and powerful tool for ensuring that your new build home is delivered to the standard you are entitled to expect. Make the most of this period by conducting a thorough snagging inspection as soon as possible after moving in, reporting all defects promptly and in writing, and maintaining meticulous records of every communication with the developer.

Do not assume that minor defects are “just part of buying a new build.” While some settlement and cosmetic adjustment is normal, construction defects are not something you should accept. The developer has a legal and contractual obligation to deliver a home that is built to a proper standard, and the defect liability period ensures you have a clear window to hold them to that obligation.

If the developer is slow to respond or refuses to address legitimate defects, escalate through the available channels: the warranty provider’s resolution service, the Consumer Code dispute resolution process, and if necessary, legal action. With proper documentation and a clear understanding of your rights, you are well-positioned to achieve a satisfactory outcome.

For further guidance on the legal aspects of buying and owning a new build home, explore our guides to the legal checklist for exchanging on a new build and the conveyancing process for new builds.