Traditionally used for small projects under $500,000, market feedback showed users applying the Green Book to projects over $10 million. The 2021 edition removes specific quantitative limits. It is now an optimized, resource-light alternative to the 2017 Red and Yellow Books for low-to-medium risk projects. Design Flexibility:
Older versions of the Green Book (pre-2021) had a notorious flaw: they lacked clear adjudication provisions. In the UK, the Construction Act 1996 gives parties a right to adjudication. The old 1990s Green Book tried to exclude it. The explicitly embraces it.
Supports lump sum, re-measurement, or cost-plus arrangements.
The 2021 update brings the Green Book in line with modern best practices and FIDIC’s 2017 suite of contracts. Key improvements include:
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