
Montreal By-law 21-042 Compliance
Energy Benchmarking & Greenhouse Gas Reporting for Large Buildings
If you own or manage a qualifying building in Montréal, By-law 21-042 requires annual reporting of building energy consumption and greenhouse gas emissions.
Zenith Net-Zero provides end-to-end support for By-law 21-042 compliance, from data collection and benchmarking through validation and submission.
Who Must Comply?
The By-law applies to:
✔ Buildings 2,000 m² (21,528 ft²) or larger
✔ Condominium buildings with 25 or more dwelling units
✔ Commercial and institutional building owners required to report annual energy consumption and greenhouse gas emissions
Missed the Deadline?
End-to-End Compliance Support
By-law 21-042 compliance is mandatory.
We make it effortless.
Compliance with By-law 21-042 can be time-consuming. Gathering utility data, maintaining ENERGY STAR Portfolio Manager, validating information, and preparing submissions all require careful attention.
Zenith Net-Zero manages the entire process on your behalf, helping ensure your reporting is accurate, complete, and submitted efficiently.
We manage every step:
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Set up or update your ENERGY STAR Portfolio Manager account
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Collect and upload utility and building data
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Validate your energy and emissions information
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Prepare the required benchmarking reports
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Submit your declaration to the City of Montréal
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Provide ongoing support for future reporting years
Need Support with By-law 21-042 Compliance?
Whether you need to confirm your reporting obligations, prepare a declaration, or address an outstanding requirement, Zenith Net-Zero can provide practical, end-to-end support.
Tell us how we can assist, and our team will be in touch shortly.

