Planning

Definition and Scope of Planning#

In the context of the UK built environment, planning refers to the process of designing and preparing for a building project’s development. Within the specialised sector of cladding and external wall systems (EWS), this encompasses the strategic coordination of architectural design, material specification, and regulatory alignment. Planning serves as the foundational phase where the technical objectives of a remediation or replacement project are reconciled with statutory requirements and the physical constraints of the existing structure.

Unlike internal refurbishment, planning for external works necessitates a comprehensive understanding of the building’s relationship with its surroundings, including its height, proximity to boundaries, and its visual impact on the local character. In professional practice, planning is not merely an administrative precursor but a continuous technical discipline that ensures every stage of a cladding project—from initial site investigation to final certification—is sequenced correctly to manage risks and meet technical benchmarks.

Planning in the Context of Cladding Remediation#

When addressing cladding testing, repair, or replacement, the planning phase is triggered once an initial assessment, such as a PAS 9980 appraisal, identifies a requirement for remedial action. At this stage, planning involves the development of a 'strategy for remediation'. This strategy dictates whether a full removal and replacement of the external wall system is necessary or if targeted repairs and the introduction of compensatory measures, such as fire breaks or cavity barriers, are sufficient.

Technical planning for cladding work requires meticulous documentation of the existing 'as-built' condition versus the proposed 'as-remediated' design. This often involves the use of Building Information Modelling (BIM) or detailed CAD elevations to map out the exact location of various components. For high-rise residential buildings, the planning process must also account for the logistics of the site, including the placement of scaffolding or mast climbers, which may themselves require specific permissions if they encroach on public highways or neighbouring land.

Building Fabric and External Wall Systems#

The planning of cladding projects is inextricably linked to the integrity of the building fabric. An external wall system is a complex assembly of components, including the outer rainscreen, insulation, sub-frame, vapour membranes, and the structural backing wall. Effective planning ensures that the replacement of one element does not negatively impact the performance of another. For instance, increasing the thickness of insulation to meet contemporary thermal standards may require a redesign of the window reveals and flashings to ensure weather tightness.

Furthermore, planning must address the hydrothermal performance of the building fabric. Altering the cladding system can change how moisture moves through the wall assembly. Professional planning involves calculating interstitial condensation risks to prevent long-term structural decay or mould growth within the renewed wall system. This level of technical preparation ensures that the remediation provides a durable solution that maintains the building’s environmental performance alongside its external appearance.

Regulatory and Process Context in England and Wales#

The regulatory landscape for planning cladding works in England and Wales is governed by two distinct but overlapping frameworks: Town and Country Planning and Building Regulations. While 'planning permission' typically refers to the aesthetic and land-use consent granted by a Local Planning Authority (LPA), the 'Building Control' process focuses on the technical safety and performance of the works.

In many instances, the replacement of cladding is considered a 'material alteration'. Under the Building Regulations, this requires a formal application to a building control body. For buildings defined as 'higher-risk' under the Building Safety Act 2022 (typically those over 18 metres or seven storeys), the planning and oversight process is managed by the Building Safety Regulator (BSR). This involve a rigorous 'Gateway' system where detailed design plans must be approved before construction commences. The planning stage here is critical, as it forms the basis of the 'Golden Thread' of information—a digital record of the building’s design and construction intended to be maintained throughout the building's lifecycle.

Considerations for Building Owners and Managers#

For Responsible Entities, such as Resident Management Companies (RMCs), Right to Manage (RTM) directors, and freeholders, the planning phase represents the most significant period of decision-making. It is during this time that the scope of works is defined, which directly influences the project's duration and complexity. Understanding the distinction between 'repair' and 'improvement' is vital, as this can have implications for how works are funded under various government schemes or service charge structures.

Managing agents must ensure that the planning process includes a robust communication strategy for residents. Since cladding work is highly intrusive, planning should detail the impact on building access, light levels (due to scaffolding), and the expected noise levels. A well-planned project will have clearly defined milestones and a contingency framework for addressing unforeseen issues discovered once the original cladding is stripped away, such as underlying structural defects or substandard original workmanship.

Common Misunderstandings in Cladding Planning#

A frequent misconception is that replacing cladding with a 'like-for-like' material exempts a project from the requirement for planning permission or building control approval. In reality, because the performance requirements of external walls have evolved, a like-for-like replacement may not meet current regulatory standards, and any change in the material’s composition or the system's fire performance is likely to be viewed as a material alteration.

Another misunderstanding involves the timeline of the planning phase. It is often assumed that physical work can begin shortly after a defect is identified. However, the technical planning, procurement of specialist consultants, and the statutory notice periods required by regulators mean that the pre-construction phase often takes several months. Rushing this stage can lead to significant delays later if the Building Safety Regulator or the Local Planning Authority requires design changes after the site has already been established.

Related Terminology#

The term planning is frequently used alongside several other industry-specific concepts that clarify the stage or type of preparation being undertaken:

• Pre-application Advice: A formal process where developers or building owners seek the views of the LPA or BSR on a proposal before submitting a full application.
• Design and Access Statement: A document that explains the design principles applied to a project and how issues relating to access to the building have been dealt with.
• Feasibility Study: An initial assessment carried out at the start of the planning process to determine the technical and financial viability of various remediation options.
• Method Statement: A document detailing exactly how a specific task will be carried out on-site, often developed during the later stages of planning to ensure safety and precision.
• Specification of Works: A detailed technical document that describes the materials and workmanship required for the cladding project, serving as the basis for the planning and tendering process.