Glossary · Two-word term
Building Control
In short
local authority or approved inspector ensuring building regulation compliance
Building control describes the regulatory process in the UK where local authorities or registered approvers verify that building work, including cladding remediation, complies with the technical standards and fire safety requirements set out in the Building Regulations.
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Building Control
Definition and Scope of Building Control
In the UK construction and property sectors, building control refers to the statutory function performed by either local authority building control departments or private sector Registered Building Control Approvers (formerly known as Approved Inspectors). The primary objective of this function is to ensure that building work complies with the Building Regulations, a set of minimum standards for the design, construction, and alteration of buildings.
For projects involving the external envelope, building control serves as a regulatory gateway. It is distinct from the planning process, which concerns the aesthetic, environmental, and social impact of a development. Building control focuses on technical performance, specifically addressing structural integrity, fire safety, moisture resistance, and thermal efficiency. In the context of cladding, this oversight ensures that any interventions—whether original installation, remedial work, or full replacement—adhere to the functional requirements set out in the legislation.
Regulatory Context in England and Wales
The regulatory landscape for building control has undergone significant transformation following the introduction of the Building Safety Act 2022. This legislation established the Building Safety Regulator (BSR), overseen by the Health and Safety Executive (HSE). The BSR now acts as the exclusive building control authority for "higher-risk buildings" (HRBs) in England, typically defined as those at least 18 metres in height or having at least seven storeys and containing at least two residential units.
For buildings falling outside the HRB definition, the dual-system of local authorities and private approvers remains. However, the professional standards for individual building control surveyors have been formalised through mandatory registration and a code of conduct. This ensures that the individuals assessing cladding systems possess the requisite technical competency to interpret complex fire safety requirements and material classifications.
Role in Cladding Testing and Remediation
When a building undergoes cladding testing—such as an EWS1 assessment or a detailed intrusive survey—building control is often not involved in the initial investigative phase. However, if the testing identifies a need for remedial action or full system replacement, building control becomes central to the project lifecycle.
Remedial works to the external wall are generally considered "material alterations" under the Building Regulations. Consequently, a building control application must be submitted before work commences. During the remediation process, building control surveyors perform site inspections to verify that the materials being installed match the approved plans and that the workmanship, particularly regarding cavity barriers and fire stopping, meets the required standards. The process concludes with the issuance of a Completion Certificate (or a Final Certificate for private providers), which serves as official evidence that the works, as far as can be reasonably ascertained, comply with the regulations.
Impact on Building Fabric and External Wall Systems
Building control oversight is critical to the performance of the external wall system (EWS), which is a complex assembly of components including the outer rainscreen, insulation, cavity barriers, membranes, and the structural substrate. Each component must be assessed not only in isolation but as part of a holistic system.
A primary focus for building control in cladding projects is Requirement B4 of Schedule 1 to the Building Regulations, which stipulates that the external walls of the building shall adequately resist the spread of fire over the walls and from one building to another. This involves verifying the European Classification (Euroclass) of materials—such as A1 or A2-s1, d0—where specified by the regulations for buildings of certain heights or uses. Furthermore, building control ensures that the thermal performance of the building fabric is maintained or improved (Part L) and that the risk of interstitial condensation is managed (Part C).
Building Control
Responsibilities for Building Owners and Managers
Building owners, Managing Agents, and Residents’ Management Company (RMC) or Right to Manage (RTM) directors hold specific legal duties regarding building control. Under the amended Building Regulations, "dutyholders"—including the client, principal designer, and principal contractor—must ensure that the work is compliant.
It is a common misconception that the building control surveyor is responsible for the quality of the build; in legal terms, the primary responsibility for compliance rests with those carrying out the work. Directors and managers must ensure that a robust building control strategy is in place for any cladding project. This includes ensuring that the correct application has been made to the relevant authority (BSR for HRBs, or local authority/registered approver for others) and that all completion documentation is safely archived. The absence of a building control completion certificate can significantly complicate future property transactions, insurance renewals, and mortgage applications.
Common Misunderstandings and Nuances
A frequent point of confusion is the distinction between a building control surveyor and a clerk of works or a project manager. A building control surveyor does not provide full-time site supervision; they perform periodic inspections at key stages. Therefore, their involvement does not replace the need for independent quality monitoring by the client’s professional team.
Another misunderstanding involves the "grandfathering" of older systems. When a cladding system is replaced, it must generally comply with the standards in force at the time the replacement work is carried out, rather than the standards that existed when the building was originally constructed. This can lead to significant changes in material specifications during remediation projects. Additionally, the role of building control is technical and regulatory; they do not provide warranties or guarantees regarding the long-term commercial value or "insurability" of a cladding system, though their certification is a prerequisite for most warranty providers.
Related Technical Terminology
To understand building control, it is necessary to be familiar with several closely related terms used in the cladding and regulatory sectors:
| Term | Definition |
|---|---|
| BSR | The Building Safety Regulator; the building control authority for higher-risk buildings in England. |
| Initial Notice | A document submitted to a local authority by a private approver notifying them that they are supervising a project. |
| Material Alteration | Work that results in a building or its services no longer complying with a requirement they previously met, or worsening existing non-compliance. |
| Requirement B4 | The specific section of the Building Regulations concerning the external spread of fire. |
| Completion Certificate | The final document issued by building control confirming the works are compliant with the Building Regulations. |
| Approved Document | Guidance issued by the government providing technical solutions for meeting Building Regulations requirements. |
These terms form the framework within which building control operates. For those managing residential blocks, ensuring that professional advisors correctly navigate these terms and the associated processes is essential for the legal and physical integrity of the building fabric.
Building Control