• “A Study on Letting and Improper Usage of Bambalapitiya Tower Building”, 1993.
• “Determinants of Consumer Behavior in the Housing Market in Colombo”, 2000.
• “Study on Issues in Establishing International Property Markets in Colombo”, 2005.
• “Households’ Participation in Supply of Housing for the Next Generation in Public Sector Housing Schemes”, 2008
• Critical Analysis of Residential Locations in the City of Colombo, 2012
• Study of Property Standards and their impact on Property Management in Sri Lanka, 20113/14 (ongoing)
• Summitpura Urban Housing Project, unpublished project study (Group Study).
• Puttalam Town Structure Plan, unpublished project study (Group Study)
• A Planning framework for Project Development and Implementation in Puttalam unpublished project study
• The Possible Solution to the Housing Problem of Low-income Groups in Urban Sri Lanka, unpublished term paper
• Planning Methods and Policies (with special reference to the role of Urban Development Authority in Development of Colombo), unpublished term paper
• Low-income Housing in Colombo Suburban Area – Case Studies of Five Settlements.
• Physical Survey – Existing Situation at Maligakanda, Urban Development Authority, Colombo – 1984, unpublished project report (joint study with the project team)
• Establishment of Community Development Council, Maligakanda inner-city Slum Improvement Project, Urban Development Authority, Colombo – 1984, unpublished project report (joint study with L. Mirihagalla)
• Sri Lanka’s New Capital – Sri Jayewardenepura, Urban Development Authority, Colombo 1982 (A member of the Planning Team)
• Mobilising People’s Power through Informal Community Leadership – a case study on Land Regularization at Henamulla Shanty Upgrading Project, National Housing Development Authority, Colombo – 1986 unpublished project report)
• A Special Study of Multi-Purpose Co-operative Society Dompe, Pugoda, Sri Lanka, Institute of Co-operative Management, Colombo 1987 (unpublished project report submitted to the Sri Lanka Institute of Co-operative Management as a part of consultancy services to the above Institute)
• Shelter in Sri Lanka – 1978 – 1991, Ministry of Housing and Construction, Colombo (report prepared on the occasion of the South Asian Year of Shelter Regional Workshop held in Colombo, Sri Lanka, 4th – 10th August 1991 (K. Locana Gunaratna, Susil Sirivardana, K.A. Jayaratna, Janakie Edirisinghe)
• Environment Impact Assessment of the Southern Railway Extension between Matara and Kataragama – Impact on the use of land and human settlements (unpublished project report submitted to the Natural Resource Environmental Policy Project (NAREPP), Colombo, Sri Lanka – March 1993.
• Community Level Monitoring and Evaluation of Settlement Improvement – a technical report submitted to the United Nations Centre for Human Settlements (UNCHS) under the UNCHS/DANIDA Community Action Planning Training Programme – April 1993
• The Urban Street Food Trade in Colombo with Special Reference to the Role of Women’s Participation – a research conducted under the Research Grant Scheme (1992) of the University of Sri Jayewardenepura, (USJP) – January 1994
• Rationale for Environmental Education – an article published in the journal of Devi Balika Maha Vidyalaya, Colombo (40th Anniversary Souvenir) – 1992
• Women, Shelter and Development – an Article published in the Daily News of 04th October 1993, Sri Lanka on the occasion of World Habitat Day.
• Managing Land Resources for Sustainable Development Training Professionals to Meet the Challenge – an article published in the Management Review, Vol. 01 No. 01 – March 1994, Faculty of Management Studies and Commerce, USJP.
• Handapanagala Human Elephant Conflict – A term paper submitted in partial fulfillment of the requirements for the Postgraduate – Diploma in Environmental Science, University of Colombo. 1998.
• Poverty & Environment – A term paper submitted in partial fulfillment of the requirements for the Postgraduate – Diploma in Environmental Science, University of Colombo. 1998.
• Proposals for Local Government Reforms – written submission by the Community Action Planning Resource Persons Associated (CAPRES) to the Commission of Inquiry on Local Government Reforms, 1998. (Members of the study team Susil Sirivardana, Janakie Edirisinghe, and Lalith Mirihagalla)
• Sri Lanka Housing Standard Study – A research study done for the Intermediate Technology Development Group (ITDG), 1999. (Members of the study team Susil Sirivardana, Janakie Edirisinghe, and Lalith Mirihagalla.