This dataset provides the underlying data for Figure 9 of the report "Igniting the Market for Energy Conservation in the GCC Built Environment" (2026). It covers the variables required for the annual per capita decomposition of building-sector CO₂ emissions across six GCC countries (Bahrain, Kuwait, Oman, Qatar, Saudi Arabia, and United Arab Emirates) for the period 1990–2023, including derived per capita CO₂ estimates. Data is sourced from Enerdata's Global Energy & CO₂ Database.