Report your 2022 energy and water data to the Ministry of Energy before the July 1, 2023 EWRB reporting deadline.

A The Province of Ontario’s Energy & Water Reporting and Benchmarking (EWRB) regulation (O. Reg. 506/18) is designed to help building owners and managers improve their building’s performance. Through this regulation, large buildings are required to report annual energy and water consumption and performance data. Ontario’s Guide to Energy and Water Reporting provides a detailed overview of the regulation and reporting requirements.

With buildings generating more than half of Toronto’s greenhouse gas emissions, improving the energy efficiency of Toronto’s building stock will be key to addressing the climate emergency. The City’s Net Zero Existing Buildings Strategy will require the owners of all existing buildings in Toronto to decarbonize their buildings by 2040 and encourages to extend the provincial benchmarking and reporting requirements to buildings of all sizes. Full details on the provincial regulation can be found in Ontario’s Guide to Energy and Water Reporting.

The City of Toronto recently released an EWRB Guide for Toronto Building Owners.

Building performance benchmarking is the process of tracking a building’s energy and water use over time. This allows for the building’s performance to be measured against its past performance as well as the performance of similar buildings. Benchmarking is the first step towards improving building efficiency.

Benchmarking your building’s energy and water use can help you:

  • determine the baseline performance level of your building
  • save money by tracking energy and water usage
  • identify energy and water efficiency opportunities
  • take action to reduce your building’s greenhouse gas emissions

Building Size (Gross Floor Area*) Annual Reporting Requirement Regulatory Body
100,000 square feet and larger Mandatory   Province of Ontario

(O. Reg. 506/18)

50,000 square feet and larger Voluntary in 2022;

Mandatory as of 2023

Province of Ontario

(O. Reg. 506/18)


Assisting buildings below 50,000 square feet in size with understanding energy reporting and benchmarking and its benefits, is also part of the City’s Existing Building Strategy.

*The Gross Floor Area (GFA) of a single building or structure is the total number of square feet between the exterior surfaces of its enclosed fixed walls.

It includes:

  • Places inside the building or structure’s supporting areas, such as any common areas.
  • Atriums, elevator shafts, mechanical equipment areas and storage rooms.

GFA does not include any exterior, unroofed or open-air spaces, such as an outdoor parking area.

GFA is not the same as rentable space, but rather includes all area inside the building(s). Rentable, or leasable, space is a sub-set of GFA.

The EWRB Guide for Toronto Building Owners provides step-by-step instructions on how to benchmark and report your building’s energy and water data.

For detailed instructions on how to submit your report using Energy Star Portfolio Manager, please refer to the Ministry of Energy Portfolio Manager Guide. Please ensure to use the 2023 reporting link (also located at the top of this page) to submit your 2022 usage data.

Natural Resources Canada Training Resources

Natural Resources Canada offers a range of free ENERGY STAR Portfolio Manager building energy benchmarking tools, information sessions, presentations and training webinars on their Benchmarking training resources webpage.

Better Buildings Partnership Webinars

The following webinars are arranged by City staff to provide information and guidance on the benchmarking and reporting process:

EWRB – What to Know and Submission Advice

Join the Better Buildings Partnership team to take a closer look at the mandatory Energy and Water Reporting and Benchmarking (EWRB) regulation in the province of Ontario. A guest speaker from Keller Engineering will present on what organizations should know, how to report, and tips for smooth submission. This session will be useful both for first time reporters and repeat reporters.

Date: April 13, 2023
Time: 12:00 pm

Click here to register

To request your EWRB ID or update your reporting lead contact information, please contact EWRB Support by:

For questions about ENERGY STAR Portfolio Manager, please refer to the Natural Resources Canada Benchmarking FAQ or email your questions to

For questions about the benchmarking and reporting process for Toronto buildings or to request one-on-one support, please contact us at

The City’s Navigation & Support Services program can help you identify potential energy efficiency opportunities for your building and access available incentives and financing for energy retrofit projects. Once you have submitted your EWRB data, you will receive a confirmation email including a summary of the data for your building.

To request a consultation with a Navigation & Support Services advisor, please complete the application form, include a copy of your building’s  EWRB response data and send it to