EWRB Compliance in Ontario: What CRE Owners Need to Know

If you own or manage a commercial building in Ontario above the size threshold, your 2025 energy and water data is due to the Ministry of Energy and Mines by July 1, 2026. That's roughly nine weeks from now — and for portfolios that haven't started gathering utility data, the window is already uncomfortably tight.

In our work with property managers and asset managers across the province, we still regularly encounter portfolios where EWRB compliance is incomplete, inconsistent, or being scrambled together in June. The regulation has been in effect since 2018; the lead times required to comply have not changed. And unfortunately, some utility providers are still stuck using very manual data collection processes for whole building consumption.

In case you aren't aware already here's what the regulation requires, and what you should be doing now.

Deadline Pressure

The July 1 reporting deadline looks distant on a calendar. The operational reality is that the prerequisite steps stack up against it:

• Local distribution companies (LDCs) sometimes need 4–6 weeks to fulfill aggregated electricity, gas and water data requests. Hydro One recommends submitting requests by February 28 to ensure delivery before July 1. Hydro Ottawa publicly notes that requests received after June 1 may not be processed in time.

• Enbridge gas data requests are typically fulfilled between March 1 and June 1, and take roughly four weeks to process.

• Peel Region introduced a $43.26 administration fee for water consumption data requests effective January 1, 2026, with a 10-business-day processing target — but only after payment is confirmed.

• Buildings 100,000 sq ft and larger require third-party verification in the first reporting year and every five years thereafter. Verification can't be rushed in the final week before submission.

If you're reading this in May and you haven't filed data requests, you don't have much time. Mid-May is the practical wall for most LDCs.

Who Has to Report

The regulation, Ontario Regulation 506/18 under the Electricity Act, applies to privately-owned buildings of:

• 50,000 sq ft (≈4,645 m²) or more — commercial, multi-unit residential (10+ units), and certain industrial properties

If your portfolio includes large commercial office, retail, or mixed-use buildings in Ontario, every covered asset needs an EWRB ID and a Portfolio Manager record. Portfolios that have grown through acquisition or restructured ownership in the past 18 months should re-confirm scope — newly acquired assets are a frequent source of missed obligations.

Toronto building owners face a parallel municipal obligation: the City's Energy and Water Reporting Bylaw (Municipal Code Chapter 367) requires reporting to the City by July 2, 2026, using the same Portfolio Manager tool. Toronto is also expanding the bylaw — buildings between 10,000 and 49,999 sq ft begin mandatory municipal reporting in 2027. If your portfolio includes smaller Toronto assets, this is the year to build the data infrastructure, not next.

What You're Required to Submit

The core obligations under EWRB are:

1. Benchmark in ENERGY STAR Portfolio Manager

Track and record your building's annual energy and water use using the U.S. EPA's free benchmarking platform. This captures electricity, natural gas, water, and any other energy sources — typically pulled from utility bills or aggregated whole-building data from your LDC.

2. Report annually to the Province

Covered buildings must submit benchmarking data to the Ministry of Energy and Mines by July 1 each year for the prior calendar year. Reports include building characteristics, energy and water consumption data, and an ENERGY STAR score where applicable.

3. Verify on schedule

Buildings 100,000 sq ft and larger must have their reported data verified by a qualified third party — a professional engineer, certified energy manager, or similarly qualified individual — in their first year of reporting and every five years after. Smaller covered buildings are not subject to mandatory verification but are increasingly choosing to verify voluntarily for ESG reporting purposes.

The Compliance Gaps We See Most Often

When portfolios miss the deadline or submit data that won't withstand scrutiny, the failures cluster around the same five issues every cycle:

Late utility data requests. Owners assume LDC data is on-demand. It isn't. By the time you realize you're missing data in mid-June, you can't get it in time.

Inconsistent portfolio tracking. Large portfolios with many assets often have some buildings up to date and others that fell behind during a leasing transition, an asset sale, or a property management handoff. EWRB obligations don't transfer cleanly through these events unless someone is actively tracking them.

Multi-tenant whole-building data gaps. Buildings with individually metered tenant suites still need aggregated whole-building data. That requires coordination with the LDC and, in some cases, with tenants — none of which is fast in June.

Portfolio Manager setup errors. The platform is free but the setup matters. Wrong property type, incorrect floor area, missing occupancy, miscoded energy meters — any of these produce ENERGY STAR scores that don't reflect actual performance. Once an error is baked into multi-year data, it's painful to correct.

Weak verification documentation. For 100,000+ sq ft buildings in their verification year, the qualified verifier must review methodology, source data, and confirm accuracy. Light-touch "verification" services that don't generate defensible documentation create a problem the next time the portfolio is audited or asked to disclose to investors.

Why This Year Is Different

Two pressures are converging on the 2026 reporting cycle that didn't exist in earlier years:

Investor scrutiny of benchmarking data has intensified. Institutional owners, lenders, and ESG-focused capital are using EWRB and similar disclosures as a signal of operational discipline. Incomplete or inconsistent data isn't just a regulatory issue — it's a credibility issue with the people writing cheques.

The Toronto municipal program is expanding. Owners with assets between 10,000 and 49,999 sq ft in Toronto begin mandatory reporting in 2027, which means 2026 is the year to build the operational muscle — request your EWRB IDs, get your buildings into Portfolio Manager, establish your data request workflows with LDCs — rather than start the work cold next spring.

What to Do This Week

If you're responsible for an Ontario CRE portfolio and you haven't started the 2026 cycle:

1. Confirm scope. List every property in your portfolio. Identify which are covered (50,000+ sq ft, commercial / multi-residential / industrial). Confirm each has an active EWRB ID.

2. Submit utility data requests now. Hydro One, Hydro Ottawa, Toronto Hydro, Enbridge, and regional water utilities each have their own request workflows. Submit before mid-May for any chance of clean processing.

3. Audit your Portfolio Manager records. Confirm property type, gross floor area, and meter configuration are correct for every covered asset. Errors here distort everything downstream.

4. For 100,000+ sq ft buildings in their verification year: engage your verifier now. Verification is not a same-week task.

5. For Toronto assets: confirm whether you're also subject to Chapter 367 reporting and plan for the July 2 municipal deadline alongside the provincial one.

How GreenCheck Supports EWRB Compliance

GreenCheck supports EWRB compliance for CRE portfolios across Ontario — from initial Portfolio Manager setup through annual reporting and third-party verification for covered buildings. We work with property managers and asset management teams to build consistent, defensible reporting processes that satisfy the regulation, hold up under investor scrutiny, and create the data foundation for broader ESG and climate disclosure obligations.

If your 2026 cycle is behind schedule — or if you're looking ahead to the Toronto bylaw expansion in 2027 — the time to put the operational infrastructure in place is now, not when the deadline is two weeks away.