Maximizing sustainability of existing buildings within limited upgrade budgets

Moatassem Abdallah, Boateng Akyeampong, Khaled El-Rayes

Research output: Contribution to journalArticlepeer-review


Existing buildings, especially aging ones, are currently in urgent need of upgrading to improve their performance and potentially achieve green certification. Building owners often need to identify and implement building upgrades that maximize the sustainability of their buildings as well as achieve green certification programs such as the Leadership in Energy and Environmental Design (LEED). This paper presents the development of an optimization model that maximizes the number of earned LEED points for existing buildings within a specified upgrade budget. A case study of an existing building is used to demonstrate the use of the optimization model and illustrate its capabilities. This research presents new methodology for optimizing the selection of building upgrades to maximize the sustainability of existing buildings and achieve green certification within limited budgets. The present model is expected to support decision-makers, building owners and operators, building managers, and contractors to optimize the use of their upgrade budgets and maximize sustainability of their buildings.

Original languageEnglish (US)
Pages (from-to)705-716
Number of pages12
JournalCanadian journal of civil engineering
Issue number9
StatePublished - 2018


  • Maximizing sustainability of existing buildings
  • Optimisation
  • Upgrade cost

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • General Environmental Science


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