Case Study

128 King's Road, Chelsea SW3

A complex mixed-use conversion turning an underperforming office building into high-value retail at lower levels with premium apartments above, including a mansard roof extension and full M&E renewal.

Programme14 Months
Budget Band£2.8m - £3.4m
Planning ContextRBKC High-Street Constraints
OutcomeRetail + 3 Residential Units
128 King's Road Chelsea exterior after conversion 128 King's Road Chelsea conversion frontage and fit-out

Scope & Specification

  • Basement and ground-floor retail shell and fit-out coordination
  • Upper-floor residential reconfiguration and complete refurbishment
  • Mansard extension with steel framing and thermal upgrade package
  • New plumbing, electrical distribution, ventilation and life-safety systems

Timeline Milestones

  • Months 1-3: technical design, approvals, party-wall and logistics planning
  • Months 4-8: strip-out, structural works and roof reconstruction
  • Months 9-12: M&E first fix, envelope, compartmentation and fire strategy
  • Months 13-14: retail fit-out handover, apartment finishes and commissioning

Budget Framework

  • Structural + envelope works: ~38%
  • M&E services and compliance upgrades: ~24%
  • Retail and residential interiors: ~29%
  • Professional fees, prelims and contingency: ~9%

Delivery Challenges Solved

  • Maintained façade character while introducing new commercial performance
  • Managed high-street neighbour and access constraints during build
  • Sequenced multi-use handover to reduce void time and leasing delay
  • Delivered modern standards in an architecturally sensitive context

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