Proceedings of the Smart Sustainable Development Conference 2025 (SSD 2025)

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Construction & Demolition Waste Minimisation in New Zealand: Challenges and Remedies

Authors
Rohit Gade1, *, Jeff Seadon2, Mani Poshdar3
1School of Future Environments, Auckland University of Technology, Auckland, New Zealand
2School of Future Environments, Auckland University of Technology, Auckland, New Zealand
3School of Future Environments, Auckland University of Technology, Auckland, New Zealand
*Corresponding author.
Corresponding Author
Rohit Gade
Available Online 30 June 2025.
DOI
10.2991/978-94-6463-720-5_5How to use a DOI?
Keywords
C&D Waste; C&D Waste Minimisation Approaches; Waste Minimisation Framework
Abstract

Construction and Demolition (C&D) waste contributes to half of the total landfill waste in New Zealand (NZ). Further, C&D waste is the largest waste stream in Auckland with 40% of waste going to landfill. This study adopts a mixed-method approach to collect and analyse data. In total, 37 semi-structured interviews were conducted with different groups from clients representative, contractors and policymakers and influencers categories. Subsequently, on-site observations on nine sites (construction, refurbishment and demolition- 3 from each) were conducted to validate the interview findings. The interviews and on-site observation provided remedy(ies) for each challenge: Waste minimisation clause in contracts (pre-design); client and contractor education (design); multiple bins and Toolbox meetings (construction); compliance to reuse and encouragement to clients and contractors (refurbishment); and technical and financial guidance and increase waste levy (demolition).

For efficient waste minimisation, actions from one group requires support from other two groups. For instance, if policymakers decides to fund community recycling centers, the client need to demand sustainable materials, and contractors needs to use them. This research is an attempt to contribute to United Nations’s Sustainable Development Goal 12 that ensures sustainable consumption of resources by achieving the Target 12.5 (substantially reduce waste generation through prevention, reduction, recycling and reuse).

Copyright
© 2025 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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Volume Title
Proceedings of the Smart Sustainable Development Conference 2025 (SSD 2025)
Series
Atlantis Highlights in Sustainable Development
Publication Date
30 June 2025
ISBN
978-94-6463-720-5
ISSN
3005-155X
DOI
10.2991/978-94-6463-720-5_5How to use a DOI?
Copyright
© 2025 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

Cite this article

risenwbib
TY  - CONF
AU  - Rohit Gade
AU  - Jeff Seadon
AU  - Mani Poshdar
PY  - 2025
DA  - 2025/06/30
TI  - Construction & Demolition Waste Minimisation in New Zealand: Challenges and Remedies
BT  - Proceedings of the Smart Sustainable Development Conference 2025 (SSD 2025)
PB  - Atlantis Press
SP  - 46
EP  - 61
SN  - 3005-155X
UR  - https://doi.org/10.2991/978-94-6463-720-5_5
DO  - 10.2991/978-94-6463-720-5_5
ID  - Gade2025
ER  -