Former Grades
ACIOB & ICIOB Members
The Associate (ACIOB) and Incorporated (ICIOB) membership grades were officially closed to new members on 1 July 2015. Existing members were encouraged to upgrade to Chartered Membership by 1 July 2025, at which point these grades were fully phased out.
Following a review in 2015, which included input from members and industry professionals, it became clear that the ACIOB and ICIOB grades caused confusion within the built environment sector. They were originally intended to be stepping stones to Chartered status, but data showed that many members at these levels were already well-qualified to advance. As a result, the decision was made to retire both grades, and they officially ceased to be CIOB membership grades from 1 July 2025.
What This Means for Former ACIOB and ICIOB Members
As of 1 July 2025:
- The ACIOB and ICIOB grades are no longer available.
- ACIOB and ICIOB members who did not transition to another membership grade are no longer members of the CIOB.
- Use of the postnominals ACIOB or ICIOB is no longer permitted.
We thank all former ACIOB and ICIOB members for their contributions and encourage those who have not yet upgraded to rejoin the CIOB, exploring their path to Chartered Membership.
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Why become a Chartered Member of CIOB?
Achieving Chartered status means your skills, capabilities and experience can clearly be recognised by others. It becomes easier to get involved in projects, and it will help you win tenders that make a big difference to your career.
Progressing to Chartered Membership enhances your membership in several ways:
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It benchmarks your skills against other Chartered Professions
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You can stand for Governance positions, and have your say by gaining voting rights
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Chartered Professionals are, on average, £152,000 better off throughout their careers
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Studies show that your employability will see a 9% increase as a Chartered Professional