Membership is open to anyone interested in furthering the aims of the group.
There is an annual subscription which depends on the category of membership, as shown below. Entry to any category is at the discretion of the committee. All memberships run from 1 January to 31 December inclusive.

Individual membership
Open to individual librarians, information officers and others working in all areas of the construction industry, whether in large or small organisations or as individuals.
Subscription �20 per year. Special rates for students/unwaged.
Members who work in a freelance capacity or offer specialist or consultancy services may also elect to join the Freelance group at no extra cost and attend their meetings.

Corporate membership
Open to organisations, particularly those wishing to receive extra copies of publications. With each corporate membership, four copies of mailings are sent to one address, and up to four persons may attend meetings, but only one nominated person has voting rights.
Subscription �60 per year.
(Individuals working for an organisation may take individual membership if they prefer.)

Affiliate membership
Open to commercial enterprises and manufacturers who have an interest in promoting construction information, or in library and information services.
This category is particularly designed for companies who are willing to sponsor CIIG events, publications etc., in the interests of furthering construction information.
Affiliate membership carries no voting rights.
Subscription �150 per year.

Open to students of related Librarianship or Construction Industry recognised courses.
This category of membership carries no voting rights.