As the peak organisation representing Professional Planners across the globe, the Commonwealth Association of Planners, abbreviated to CAP, has championed, promoted and connected planners and planning since its inception almost 50 years ago.

CAP is a volunteer based organisation, drawing support from our 27^[1] member Institutes who in turn represent over 40,000 planners and allied professionals across the Commonwealth.

The Commonwealth Association of Planners was formed provisionally on 23 September 1970, and its constitution ratified in March 1973, to, among other things;

"promote co-operation between member organisations and between individuals in the commonwealth, to achieve the most effective contribution by planners to the wellbeing of society, and the creation of a satisfactory environment."^[2]

In 2002 this was amended. The phrase "a satisfactory environment" was deleted and replaced by "more sustainable settlements and adequate shelter for all". This terminology derived from the Habitat Agenda that was agreed at the 1996 UN Habitat II meeting in Istanbul. It reflected the start of an increasingly close link between CAP and UN Habitat.

The association produces newsletters roughly three times a year, and holds conferences for planning theorists and practitioners. CAP was led by Heriot-Watt professor Cliff Hague from 2000–2006, under whom the association played a significant role in developing "new urban planning" in response to the rapid urbanisation and increased slum settlements in cities across the globe. From 2006–10 he was Secretary-General of CAP. Since 2010 Clive Harridge has been Secretary-General. CAP works with the Commonwealth Association of Architects, the Commonwealth Engineering Council and the Commonowealth Association of Surveying and Land Economy: these act together as Built Environment Professions in the Commonwealth (BEPIC). CAP also works with other Commonwealth partners as ComHabitat.

CAP led the case for the "re-invention" of planning at the 2006 UN Habitat World Urban Forum, where a book was launched to support this advocacy. The book. Making Planning Work: A Guide to Approaches and Skills was published by Earthscan. In 2010 CAP has produced two Discussion Papers published by the Commonwealth Secretariat. These are Gender in Planning and Urban Development and The State of the Cities: Why and How the Commonwealth must address the challenge of Sustainable Urbanisation.

• 2020 - Present: Eleanor Mohammed, Canada
• 2014 - 2020: Dyan Currie, Australia
• 2006 - 2014: Christine Platt, South Africa
• 2000 - 2006: Cliff Hague, United Kingdom
• 1996 - 2000: Bill Robertson, New Zealand
• 1991 - 1996: Jacqueline daCosta, Jamaica
• 1988 - 1991: Bill Robertson, New Zealand
• 1984 - 1988: Dr. Peter Pun, British Hong Kong
• 1980 - 1984: George Franklin, United Kingdom
• 1976 - 1980: A. Ligale, Kenya
• 1970 - 1976: Arthur Ling, United Kingdom

• Bangladesh Institute of Planners
• Barbados Town and Country Planning Society
• Belize Association of Planners
• Canadian Institute of Planners
• Cyprus Association of Town Planners
• Ghana Institute of Town Planners
• Institute of Town Planners India
• Institute of Town Planners Sri Lanka
• Jamaican Institute of Planners
• Kenya Institute of Planners
• Malaysian Institute of Planners
• Malawi Institute of Planners]
• Malta Chamber of Planners
• Namibia Council of Town and Regional Planners
• New Zealand Planning Institute
• Nigerian Institute of Town Planners

• Planner’s Association of Dominica
• Planning Institute of Australia
• Royal Town Planning Institute
• Singapore Institute of Planners
• South African Planning Institute
• St Lucia Institute of Land Use Planners
• Tanzania Institute of Planners
• Town & Country Planning Brunei Darussalam
• Town Planning Association of Mauritius
• Trinidad & Tobago Society of Planners
• Uganda
• Zambia Institute of Planners