Project timeline
Whitfield Rear Extension · estimated duration 23 weeks
Standard phase
Critical path
Gantt schedule
W1
W2
W3
W4
W5
W6
W7
W8
W9
W10
W11
W12
W13
W14
W15
W16
W17
W18
W19
W20
W21
W22
W23
Survey
1w
Demolition
2w
Groundworks
3w
Structure
4w
Roof
2w
First Fix
3w
Plastering
2w
Second Fix
3w
Decoration
2w
Completion
1w
Critical path risks
Groundworks → Structure → Roof carries the schedule. A 1-week slip in foundations pushes completion to 1 Jul.
Weather risk
Roofing phase falls in mid-April. Historical 7-day rain probability: 34%. Buffer 4 days into the program.
Material lead times
Howdens kitchen: 7 days. Steel beams: 10–14 days. Order steel by week 3.
Foreman AI recommendation
Your 23-week estimate sits in the bottom quartile of comparable Victorian extensions. Consider a 25-week target to protect your delivery promise and your margin.