Beyond simple replacement, some owners are opting to completely redevelop buildings with combustible cladding. A case study on the financial and engineering decisions behind this.. Re imagining a Clad Building: A Redevelopment Case Study In the wake of the Grenfell Tower tragedy, the UK construction landscape has been grappling with the pervasive issue of combustible cladding. While much of the focus has rightly been on remediation – the removal and replacement of unsafe materials – a growing number of building owners are exploring a more radical solution: complete redevelopment. This article delves into a landmark project where the decision was made to demolish a previously clad building and start anew, examining the complex financial, engineering, and regulatory considerations that underpinned this audacious choice. This case study offers invaluable insights for practitioners weighing the merits of remediation versus redevelopment in the ongoing effort to create safer built environments. Background The building in question, a 15 storey residential block constructed in the early 2000s, was typical of many structures erected during that period. Its façade featured a composite panel system that, following updated guidance and testing, was identified as posing a significant fire risk. Initial assessments, conducted in line with PAS 9980 methodology, indicated a substantial risk rating, necessitating urgent intervention. The building’s owner, a large institutional investor, initially pursued a conventional remediation strategy. This involved detailed surveys, material testing, and the engagement of specialist façade consultants to design a replacement system compliant with current Building Regulations, specifically Approved Document B (ADB). However, as the remediation project progressed, several unforeseen challenges emerged. The original structural frame, designed to accommodate a lighter façade, required significant strengthening to support the weight of a non combustible, compliant system. Furthermore, the internal layouts, while meeting the standards of their time, no longer aligned with contemporary resident expectations for space, light, and energy efficiency. The building's M&E systems were also nearing the end of their design life, requiring substantial upgrades regardless of the cladding issue. The cumulative cost of these intertwined remediation and upgrade works began to approach, and then exceed, the projected value of the refurbished asset. Key Developments The pivotal moment arrived when the owner commissioned a comprehensive feasibility study comparing the remediation pathway with a full redevelopment. This study, undertaken by a multidisciplinary team of architects, structural engineers, fire engineers, and cost consultants, meticulously analysed both options. Remediation Pathway Analysis: Façade Replacement: Estimated cost for removing the existing cladding and installing a non combustible system (e.g., A1 rated materials) compliant with ADB. This included scaffolding, temporary weatherproofing, and associated works. Structural Strengthening: Detailed analysis revealed the need for significant reinforcement to the concrete frame to accommodate the new façade’s weight and meet updated seismic and wind load requirements. This involved intrusive works, impacting existing residents. Internal Upgrades: Beyond the façade, the building required extensive refurbishment of common areas, individual apartments (kitchens, bathrooms), and a complete overhaul of the mechanical, electrical, and plumbing (MEP) systems. Disruption to Residents: The remediation process was projected to cause prolonged disruption, potentially requiring temporary decanting of residents, adding further cost and logistical complexity. Fire Safety Strategy: While the new façade would address the external fire spread risk, the existing internal compartmentation, means of escape, and fire alarm systems also required significant upgrades to meet current BS 9991 standards and the expectations of the Fire Safety (England) Regulations 2022. Redevelopment Pathway Analysis: Demolition Costs: Assessment of safe demolition, waste management, and site clearance. New Build Design: Development of a concept for a new, purpose built residential block designed from the ground up to meet current Building Regulations, including the latest fire safety standards (ADB, BS 9991/9999), energy efficiency targets, and modern living requirements. This offered the opportunity to optimise layouts, incorporate balconies, and improve natural light. Construction Costs: Detailed costings for a new build, leveraging modern construction techniques and materials. Planning & Regulatory: Engagement with local planning authorities and the Building Safety Regulator (BSR) from the outset, navigating the new BSR Gateway 2 and Gateway 3 processes for higher risk buildings. Financial Modelling: A comprehensive financial model comparing the net present value (NPV) and return