Moving into a brand-new home removes some of the usual pre-move worries, such as an unknown boiler or a roof of uncertain age, but it introduces a different one: snagging. Most new-build buyers in the UK are covered by a structural warranty, and the largest provider of these is NHBC, whose Buildmark product is worth understanding before moving day rather than after the first defect appears.
What Buildmark actually is
Buildmark is NHBC’s warranty and insurance product for new-build homes, and it is built in layers rather than being a single flat guarantee. It starts with pre-completion protection: cover for builder insolvency before the home is finished, which NHBC describes as protecting the buyer if the builder becomes insolvent during the build. This is followed by a two-year builder warranty period, backed by NHBC’s own resolution service, during which the builder, not NHBC, is contractually responsible for correcting problems caused by a failure to meet NHBC’s technical requirements. After that two-year period ends, Buildmark moves into an insurance-backed phase, normally covering the remaining years up to a total of ten years from the policy start date, for physical damage to the home caused by a failure to build to NHBC’s requirements.
Who deals with a defect, and when
During the first two years, the builder is the first port of call for anything covered by the warranty, and NHBC guidance recommends reporting a defect as soon as reasonably possible, always within the builder warranty period, and keeping a record of the correspondence. NHBC’s resolution service only becomes available once the homeowner has reported the problem to the builder, allowed reasonable time for repairs, and completed the builder’s own complaints process through to a final written response; if that response is unsatisfactory, or no response arrives within 30 days, the homeowner can then ask NHBC to step in. Once the two-year builder period has passed, responsibility shifts to the insurance element of the policy, which responds to physical damage from a breach of NHBC’s build standards rather than every cosmetic snag, and typically carries a minimum claim value below which the policy does not respond.
Cover limits
Buildmark’s pre-completion protection is commonly set at 10% of the purchase price, up to a cap of £100,000, to cover the insolvency scenario before the home is finished. The main structural cover for a new house is typically arranged up to £1 million, with a lower figure of £500,000 commonly used for a converted property, though higher limits can be available depending on the specific policy arranged for a development.
What this means for the move-in checklist
Because the two-year builder warranty period is time-limited and NHBC’s own resolution service is only available after the builder’s complaints process has been followed through, it is worth treating the weeks around moving day as the start of that clock rather than an afterthought. A room-by-room check shortly after moving in, with anything found reported to the builder and kept on record rather than mentioned only informally, preserves the ability to use NHBC’s resolution service later if the builder does not act. It is also worth confirming which warranty provider is actually behind a specific new-build purchase, since NHBC is the largest provider but not the only one, and other providers structure their own two-stage builder-then-insurer cover differently.
Common questions
Does Buildmark cover cosmetic snags like paint marks or a sticking door? During the first two years these are the builder’s responsibility to fix under the warranty, but once that period ends the insurance-backed phase responds to physical damage from a breach of NHBC’s build standards rather than minor cosmetic issues, so timing matters for what can still be claimed.
What if I move in and the builder has already gone out of business? NHBC’s resolution service can decline to help where circumstances make it unsuitable, such as builder insolvency, which is a different scenario from the pre-completion insolvency protection that applies before the home is finished.
Is NHBC the only new-build warranty provider? No. NHBC is the largest provider of new-build warranties in the UK, but several other providers offer broadly similar two-stage builder-then-insurer cover, so it is worth checking the actual certificate for a specific purchase rather than assuming it is a Buildmark policy.
The bottom line
Buildmark cover moves through three stages: pre-completion insolvency protection, a two-year period in which the builder is directly responsible for fixing defects with NHBC’s resolution service available if they do not, and then an insurance-backed period running to ten years from the start date for physical damage caused by a breach of NHBC’s build standards. Reporting defects promptly and keeping a record during the two-year builder period, and confirming which warranty actually applies to a specific new-build purchase, both matter more in the weeks around moving in than at any later point.