Mastering your works budget: 5 golden rules

1 — Serious costing always starts from a complete brief. No detailed plans? No reliable budget. 2 — Contingency provision (5 to 10%) is not optional. 3 — Finish choices represent up to 40% of the total budget. 4 — A precise schedule is a budget tool: every week of delay costs. 5 — The project manager is your ally facing craftsmen.