Published by the National House Building Council (NHBC), the NHBC Standards 2026 define the technical requirements and performance standards for the design and construction of new homes registered with NHBC
The latest annual update for the NHBC standards, which apply to all NHBC-registered homes commencing work from 1 January 2026, has been released, with updates across several areas, including some impacting fire safety.
With the stated aim to help support the delivery of high-quality new homes, the new standard looks to “drive incremental improvement and raise build quality” amongst builders and developers, and provides them with guidance on the requirements to achieve NHBC warranty and insurance.
Many of the changes for the 2026 edition have been targeted to update and clarify existing technical guidance and reinforce current best practice, rather than introducing entirely new positions. In addition, usability improvements to figure-numbering and cross-referencing have been made, and some building control guidance has been removed to clarify their purpose as warranty guidance.
One of the significant changes noted in the new standards will impact fire stopping following an update to Chapter 2.1 – Technical Requirement R3d and represents a move to a more prescriptive stance on material selection. The update refines which materials can be used for insulation in critical architectural junctions, such as party walls, spandrel panel junctions, and boxed eaves.
The standard now requires that all materials must be suitable for their intended purpose and recommends rock-based insulation in these specific areas where glass-fibre is now considered an inadequate fire-stopping material. The continued use of glass-fibre insulation at these junctions will be allowed, but only where the suitability of the material can be demonstrated through explicit test data and third-party certification.
Speaking on the release of the update, Richard Smith, Head of Standards, Research & Technical Competency at NHBC, said: “NHBC is committed to driving quality in house building, and the continuous improvement of the NHBC Standards is a key part of this. The comprehensive annual review process ensures they remain relevant and help builders and developers to deliver high-quality new homes.”
Updated in consultation with multiple stakeholders and in line with the needs of the industry, the regulatory environment, and changing consumer expectations, the goal of the standards is to “provide the required support for builders and developers to keep raising the level of quality in house building.”
Smith went on to describe the NHBC Standards as a “cornerstone in our mission to raise standards in house building.”
Further details of the updated NHBC Standards 2026, along with how to access video guides on the changes, can be found here.