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RIBA · Project Planning

Project Timeline Estimator

Estimate project duration across RIBA Plan of Work stages with a Gantt-style timeline view.

Project Type

Project Scale

Estimated Timeline

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Select project type and scale

Notes

  • Stages can overlap — real programmes are typically 15-20% shorter
  • Planning determination takes 8-13 weeks (not included in design stages)
  • Construction duration varies hugely by procurement route and site
  • Add contingency of 10-15% to overall programme

RIBA Plan of Work 2020

0 Strategic Definition 2–4 wks
1 Preparation & Briefing 4–8 wks
2 Concept Design 6–12 wks
3 Spatial Coordination 6–12 wks
4 Technical Design 8–16 wks
— Planning Application 8–13 wks
5 Construction Varies wks
6 Handover 2–4 wks

Construction Duration

Small (<500 m²): 6–12 months

Medium (500–2000 m²): 12–18 months

Large (2000–5000 m²): 18–30 months

Very large (>5000 m²): 24–48 months