Deep Retrofit in Practice: Structural, Façade and Servicing Challenges in Existing Buildings

Deep retrofit projects are increasingly positioned as critical to achieving urban decarbonisation, extending asset life, and improving the performance of aging commercial and mixed-use building stock. However, upgrading existing buildings introduces technical complexities that are often underestimated during early project planning. Structural limitations, floor-to-floor constraints, façade replacement strategies, servicing integration, fire upgrades, and phased occupation requirements can significantly affect viability, programme, and delivery risk.

This session examines deep retrofit from a technical architectural and delivery perspective, focusing on the realities of adapting existing buildings to contemporary environmental, operational, and regulatory expectations. The webinar explores structural interventions, façade replacement, MEP coordination, embodied carbon trade-offs, and the interface between existing conditions and new systems across complex urban retrofit projects. Participants will gain practical insight into how technical constraints influence design decisions, constructability, sequencing, and long-term building performance.

The session also considers how retrofit projects increasingly require architects to balance sustainability ambitions with commercial pressures, existing asset limitations, and the practical realities of construction within constrained and occupied urban environments.

Key Topics Discussed:

• Existing building analysis and technical due diligence
• Structural modification and load capacity challenges
• Façade retention, replacement, and overcladding strategies
• Floorplate limitations and spatial reconfiguration
• MEP integration within constrained existing structures
• Fire, acoustic, and regulatory upgrade requirements
• Embodied carbon versus demolition and rebuild considerations
• Thermal performance and operational energy upgrades
• Construction sequencing within occupied buildings
• Coordination risks in multidisciplinary retrofit delivery
• Cost and programme implications of existing conditions
• Lessons from complex urban retrofit and refurbishment projects