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Carbon pollution limits and reporting for existing large commercial and multi-family buildings

By 2030, we’re aiming to cut our carbon pollution from buildings in half compared to 2007 levels.

Adopted regulations and requirements 

2022 summary of regulation requirements

From 2019 to early 2022, we engaged building owners, managers, utilities, and other industry stakeholders on greenhouse gas (GHG) emission regulations for existing large office and retail buildings. 

Council then approved staff recommendations to introduce annual energy and carbon reporting requirements, GHG intensity (GHGi) limits and heat energy limits.

Review the Council report (797 KB) and amendments for more details.

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Regulatory requirements implementation timeline

  • 2023

    Annual energy and carbon reporting:

    • Commercial ≥ 9,290 m2 (100,000 ft2)
    • First reporting deadline: June 1, 2024

  • 2024

    Annual energy and carbon reporting:

    • Commercial ≥ 4,645 m2 (50,000 ft2)
    • Multi-family ≥ 9,290 m2 (100,000 ft2)
    • First reporting deadline: June 1, 2025

  • 2025

    Annual energy and carbon reporting:

    • Multi-family≥ 4,645 m2 (50,000 ft2)
    • First reporting deadline: June 1, 2026

  • 2026

    GHGi limits come into effect for commercial office and retail buildings ≥ 9,290 m2 (100,000 ft2):

    • Office = 25 kg CO2e/m2/year
    • Retail = 14 kg CO2e/m2/year
    • First reporting deadline: June 1, 2027

  • 2040

    GHGi limits come into effect for commercial office and retail buildings ≥ 9,290 m2 (100,000 ft2):

    • Office and retail = 0 kg CO2e/m2/year
    • First reporting deadline: June 1, 2041

  • 2040

    Heat energy limit for commercial buildings ≥ 9,290 m2 (100,000 ft2):

    • Office and retail = 0.09 GJ/m2/year
    • First reporting deadline: June 1, 2041

Technical Advisory Committee

This committee will help shape the technical details of regulatory development.

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Regulatory development

Implementation timeline

  • 2022-2024

    • Analysis and stakeholder consultation on performance and prescriptive regulations
    • Launching of initial multi-family owner supports and multi-family/commercial demonstration programs
    • Recommendations for 2026–2040 brought to Council
  • 2026

    Time-of-replacement requirements come into effect for select, secondary, and amenity heating equipment; for example:

    • Pools
    • Fireplaces and decorative gas appliances
    • Rooftop heating units
    • Make-up-air units
    • Sub-metering requirements for major heating and hot water equipment
  • 2030

    Updated GHGi for office and retail greater than 9,290 square metres

    GHGi Limit effective for:

    • Office and retail greater than 4,645 square metres
    • Hotels greater than 4,645 square metres
    • Assembly greater than 32,500 square metres
    • Other commercial building types greater than 4,645 square metres (TBD)
    • Multi-family buildings greater than 9,290 square metres
  • 2030-2032

    Phased deadlines for equipment replacement of select secondary heating equipment, potentially including:

    • Rooftop heating units
    • Make-up-air units
    • Pools
    • Fireplaces and decorative gas appliances
  • 2040-2050

    GHGi limits for commercial and multi-family buildings greater than 4,645 m2 (all uses):

    • 0 kg CO2e/square metres/year
    • Heat energy limit for additional commercial building types