Energy and Water Reporting and Benchmarking for Large Buildings

Buildings in Ontario including office buildings, condominiums and retail stores made up 19 per cent of Ontario’s total greenhouse gas (GHG) emissions in 2013. The Energy and Water Reporting and Benchmarking (EWRB) initiative was introduced to help building owners improve their building’s energy and water efficiency.

Reporting your data

What is Energy and Water Reporting and Benchmarking?

EWRB is the review of a building’s energy and water performance to determine how it is changing over time in comparison to other similar buildings.

Large Building Energy and Water Reporting will help building owners

  • Better manage energy and water use and costs
  • Identify best practices and energy and water-saving opportunities
  • Set and achieve measurable goals
  • Evaluate results by comparing to similar facilities across the province
  • Measure improvement over time
  • Value energy efficient and water efficient buildings

Building types that must report

The following types of privately owned buildings that are 50,000 square feet and larger are required to report:

  • Commercial
  • Multi-unit residential with more than 10 residential units
  • Some industrial buildings/properties

To find out if your building is required to report, review Ontario’s Large Building Energy and Water reporting and Benchmarking Requirement: Building Types for the full list of building types that are required to report.

Building types that do not need to report

  • Most industrial, including manufacturing facilities and all agricultural facilities
  • Government (federal and provincial), government agency and publicly owned buildings
  • Data centres
  • Television studios
  • Trading floors

Information to report yearly will include

  • Monthly energy and water consumption and performance data, e.g. energy and water use intensity, ENERGY STAR score (where available)
  • GHG emissions and intensity
  • Building characteristic information, such as gross floor area

Review Ontario’s Large Building Energy and Water reporting and Benchmarking Requirement: Data Elements for the full list of data elements building owners are required to report annually.

When you’ll need to start collecting your data

Building owners are required to report their data to the Ministry of Energy by July 1 of every year. The reporting requirement will be phased in over three years, beginning July 1, 2018, with buildings that are greater than or equal to 250,000 square ft. The reporting window will open in early 2018.

Reporting deadlines

Phased Mandatory Reporting Timeline Commercial and Industrial Buildings Multi-Unit Residential Buildings
By July 1, 2018
(information for 2017 calendar year)
250,000 square feet and larger Not required to report in first year
By July 1, 2019
(information for 2018 calendar year)
100,000 square feet and larger 100,000 square feet and larger
By July 1, 2020
(information for 2019 calendar year)
50,000 square feet and larger 50,000 square feet and larger

The Ministry will provide more information on education and training materials and opportunities later in 2017. This information will be posted on this website.

Review the regulation

Frequently Asked Questions

Other questions

If you have questions about Ontario’s Large Building Energy and Water Reporting and Benchmarking Initiative, please send an email to ewrbsupport@ontario.ca.