Green book
'The Green Book: Appraisal and Evaluation in Central Government' is produced by HM Treasury. It provides a structure for the appraisal of proposed central government projects, policies and programmes, and for the evaluation of existing projects, policies and programmes. The Green Book is supported by a range of supplementary guidance.
The Green book is intended to cover the following activities:
- Policy and programme development.
- Capital projects.
- Use or disposal of existing assets.
- Specification of regulations.
- Major procurement decisions.
The Green Book sets out transparent and consistent procedures for assessment and evaluation to ensure that public funds are spent efficiently and are spent on proposals that will be of the greatest benefit to society.
Broadly, the stages of development of a project, programme or policy are described as:
- Justify action.
- Set objectives.
- Appraise options.
- Develop and implement the solution.
- Evaluate.
Assessment is the process of deciding whether the proposal should go ahead or not, and which option to pursue. Assessment should includes economic, financial, social and environmental impacts and includes the following overall processes:
- Identify alternative approaches.
- Attach monetary values to impacts.
- Carry out cost/benefit analysis of options.
The Green Book suggests that the issues that should be considered as part of an assessment might include:
- Strategic impact.
- Economic rationale.
- Financial arrangements and affordability.
- Achievability.
- Commercial and partnering arrangements.
- Regulatory impact.
- Legislation.
- Information management and control.
- Environmental impacts.
- Rural issues.
- Equality.
- Health
- Health and safety.
- Consumer focus.
- Regional perspectives.
- European Union.
- Design quality.
The 2020 Budget included an announcement that the Green Book would be reviewed. The Green Book was subsequently updated to end the dominance of benefit cost ratio in appraisals.
The Green Book 2020 replaces the 2018 edition and is available at: https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/938046/The_Green_Book_2020.pdf
[edit] Related articles on Designing Buildings Wiki
- Additionality.
- Blue book.
- Business plan.
- Common Minimum Standards.
- Common standards.
- Development appraisal.
- Ensuring a green recovery beyond the pandemic.
- Government Construction Strategy.
- Government publishes UK infrastructure strategy.
- Investing in infrastructure for London.
- Major Projects Authority.
- OGC.
- Preliminary business case.
- Procurement route.
- Public procurement.
- Red book.
- Why we should be more positive about our ability to deliver major projects.
[edit] External references
Featured articles and news
Reform of the fire engineering profession
Fire Engineers Advisory Panel: Authoritative Statement, reactions and next steps.
Restoration and renewal of the Palace of Westminster
A complex project of cultural significance from full decant to EMI, opportunities and a potential a way forward.
Apprenticeships and the responsibility we share
Perspectives from the CIOB President as National Apprentice Week comes to a close.
The first line of defence against rain, wind and snow.
Building Safety recap January, 2026
What we missed at the end of last year, and at the start of this...
National Apprenticeship Week 2026, 9-15 Feb
Shining a light on the positive impacts for businesses, their apprentices and the wider economy alike.
Applications and benefits of acoustic flooring
From commercial to retail.
From solid to sprung and ribbed to raised.
Strengthening industry collaboration in Hong Kong
Hong Kong Institute of Construction and The Chartered Institute of Building sign Memorandum of Understanding.
A detailed description from the experts at Cornish Lime.
IHBC planning for growth with corporate plan development
Grow with the Institute by volunteering and CP25 consultation.
Connecting ambition and action for designers and specifiers.
Electrical skills gap deepens as apprenticeship starts fall despite surging demand says ECA.
Built environment bodies deepen joint action on EDI
B.E.Inclusive initiative agree next phase of joint equity, diversity and inclusion (EDI) action plan.
Recognising culture as key to sustainable economic growth
Creative UK Provocation paper: Culture as Growth Infrastructure.
Futurebuild and UK Construction Week London Unite
Creating the UK’s Built Environment Super Event and over 25 other key partnerships.
Welsh and Scottish 2026 elections
Manifestos for the built environment for upcoming same May day elections.
Advancing BIM education with a competency framework
“We don’t need people who can just draw in 3D. We need people who can think in data.”























