Who Is Responsible for Defects in a New Build Home?

Discovering a defect after moving into a new build can be frustrating, particularly when it is not immediately clear who should put it right. Depending on the problem, responsibility may sit with the housebuilder, structural warranty provider, manufacturer, insurer or homeowner.

For most buyers asking who is responsible for new build defects the first place to start is the developer's after-sales process. In the early period after completion, many qualifying defects are dealt with directly by the builder, although the exact position depends on your warranty, contract and consumer protection scheme.

Keep the developer's customer-care details and your warranty paperwork available from the day you move in. If you are still approaching completion, a professional inspection may also help establish a clear record of visible defects.

When is the new build developer responsible?

Structural warranty schemes commonly include an initial period in which the builder remains responsible for qualifying defects. Under NHBC Buildmark, for example, the builder warranty period is usually the first two years from the policy start date. NHBC states that during this period the builder is responsible for rectifying problems arising from a failure to meet NHBC requirements.

NHBC advises homeowners to contact the builder as soon as reasonably possible and to keep records of what was said, who was contacted and when. Its current guidance is available on the NHBC first two years of Buildmark cover page.

Other warranty providers can have different rules, so check your policy rather than assuming the NHBC process applies to every new build. Your developer should also explain how defects are reported, whether through an online portal, email address or customer-care team.

• Report the defect promptly through the developer's official process.

• Give a clear description and location for each issue.

• Take photographs or video where helpful.

• Keep reference numbers and copies of correspondence.

• Record appointments and any work carried out.

• Tell the developer if a repair has not resolved the original problem.

What rights do buyers have over snags and aftercare?

Consumer protection can extend beyond the structural warranty. For homes and developers covered by the New Homes Quality Code, registered developers have obligations relating to after-sales service, snagging, defects and complaints.

The New Homes Quality Board's current Code includes requirements for an after-sales service and complaints process. It also provides a route to the New Homes Ombudsman for eligible unresolved complaints under the scheme. You can check the current rules on the New Homes Quality Board after-sales and complaints page.

Not every new home or complaint is necessarily covered by the same consumer code, so confirm which scheme applies to your purchase. Your reservation date and the developer's registration can matter.

Snagging is also different from a warranty claim. A snagging report records visible defects and incomplete work, while a later structural warranty claim may concern defined damage and be assessed under an insurance policy. If you are preparing for handover, see how to choose a professional snagging inspector.

When does the warranty provider become responsible?

Later in the structural warranty period, responsibility can move away from the developer and towards the warranty insurer for specific types of covered damage. This does not mean every outstanding snag automatically becomes an insurance claim.

NHBC Buildmark is a useful example. After its two-year builder warranty period, NHBC currently provides an insurance period that usually runs through years three to ten. Cover during that stage is for damage caused by defects in specific parts of the home and is subject to policy conditions and a minimum claim value.

A loose cupboard door that was never properly adjusted and serious damage caused by a defect in a covered structural element are therefore very different types of issue. The age of the home, cause of the problem and exact policy wording all affect the route you should take.

• Check whether you are still inside the developer warranty period.

• Identify the warranty provider and policy start date.

• Read which parts of the home are covered in the current period.

• Check exclusions and any minimum claim value.

• Contact the provider if the problem appears to fall within the insurance section.

• Do not delay reporting an issue while responsibility is being established.

What if the developer will not fix the defect?

If you believe the developer is responsible but the issue remains unresolved, move from informal chasing to the formal complaints process. Keep your communication factual and set out the defect, when it was first reported, what work has been attempted and what outcome you are seeking.

Check your structural warranty for any resolution service that may apply during the builder warranty period. Also check the consumer code covering your home to see whether an independent dispute or ombudsman route is available.

For significant defects, safety concerns or disputes involving substantial costs, consider taking advice from an appropriately qualified professional or legal adviser. A general online guide cannot determine contractual responsibility for a specific defect.

The developer's wider after-sales performance is worth researching before you buy. The New Build Rankings developer profiles bring together available customer satisfaction and review information that can help you investigate the housebuilder before reserving.

Most importantly, do not wait until a defect has been unresolved for months before creating a paper trail. Report problems promptly, follow the official process and keep evidence. Knowing whether you are dealing with the developer, structural warranty provider or another insurer makes it much easier to pursue the correct route.