Case Study

2 Holland Avenue, Wimbledon SW20

A major home upgrade combining loft conversion, rear and side double-storey extension and full-house refurbishment, delivered with tight sequencing and structural coordination.

Programme12 Months
Budget Band£520k - £680k
WorksLoft + Rear/Side Extension
Area GainSignificant New Family Space
Holland Avenue Wimbledon extension and loft completed exterior Holland Avenue Wimbledon full refurbishment project

Scope & Specification

  • Rear and side double-storey extension package
  • Loft conversion with new structural frame and upgraded insulation
  • Whole-house interior refurbishment and layout optimisation
  • Complete M&E upgrades to current performance and safety standards

Timeline Milestones

  • Months 1-2: detailed design, approvals and mobilisation
  • Months 3-6: groundworks, extension structure and envelope
  • Months 7-9: loft structural works and service routes
  • Months 10-12: finishes, commissioning and final defects close-out

Budget Framework

  • Structure and envelope works: ~40%
  • M&E upgrades and controls: ~22%
  • Interior finishes and joinery: ~30%
  • Professional fees, prelims and contingency: ~8%

Delivery Challenges Solved

  • Integrated extension and loft sequences without rework overlap
  • Maintained consistent architectural character across new and old fabric
  • Coordinated structural changes while preserving day-to-day site safety
  • Delivered upgraded comfort, flow and resale resilience for family use

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