June 2026 is bringing several important law and policy changes across Ontario, with new rules set to impact apartment tenants, landlords, consumers, businesses, and even Canada’s border enforcement efforts.
From mandatory cooled spaces in apartment buildings to expanded electricity grid programs and new federal financial support payments, residents across the province could start noticing changes almost immediately as the new month begins.
Here’s a detailed look at the biggest laws, regulations, and policy updates taking effect in Ontario in June 2026.
Toronto’s New Indoor Temperature Standards Bylaw Takes Effect
One of the most talked-about changes arriving this summer involves apartment buildings in Toronto and new temperature standards designed to help residents during increasingly hot weather.
Beginning June 1, 2026, Toronto’s new Indoor Temperature Standards bylaw officially replaces the city’s older heating bylaw. The new regulation was approved by Toronto City Council last year and focuses heavily on cooling access for tenants during the summer months.
What the New Rule Means for Apartment Buildings
Under the bylaw, apartment buildings participating in the RentSafeTO program that do not provide air conditioning inside rental units must give tenants access to a cooled indoor amenity space.
These designated spaces must remain at or below 26 C between June 1 and Sept. 30.
The city says the measure is intended to protect tenants during heat waves and prolonged periods of high summer temperatures, which have become more common in recent years.
What Counts as an Amenity Space
The bylaw defines an indoor amenity space as a shared and accessible area available for recreation, relaxation, or social gatherings for all building occupants.
However, certain parts of a building are excluded from the definition. Hallways, laundry rooms, and lobbies do not qualify as acceptable cooling areas under the regulation.
The rule also does not apply if major construction work would be required to create or modify an amenity space to meet the cooling requirements.
New Responsibilities for Landlords
Landlords will now be required to notify tenants about the location and operating hours of cooled amenity spaces within their buildings.
The city is also preparing to explore even stricter rules later this year. Municipal Licensing and Standards is expected to propose a separate maximum temperature bylaw for rental units sometime in July.
That future proposal could potentially introduce temperature caps directly inside apartment units themselves.
Federal Government Introducing Temporary Controls on New Illegal Drug Substances
Another significant change arriving in June involves federal border protection and illegal drug enforcement measures.
The federal government announced earlier this month that temporary controls would be introduced under the Controlled Drugs and Substances Act for three substances connected to illegal drug activity.
The new controls officially come into force on June 5, 2026, and will remain active for one year.
Which Substances Are Included
The temporary controls apply to the synthetic opioids spirobrorphine and spirochlorphine, along with a precursor chemical known as R 29676.
Federal officials say these substances have been linked to criminal importation activity and have also been detected internationally.
Why Ottawa Is Expanding Controls
According to the federal government, the temporary measures are designed to strengthen Canada’s ability to stop illegal production, trafficking, and importation activities tied to dangerous synthetic substances.
Officials say the move is part of Canada’s broader Border Plan strategy.
The government described the action as a proactive response aimed at giving law enforcement and border agencies stronger powers to intercept illegal shipments before the substances spread further across the country.
Synthetic opioids continue to remain a major concern for Canadian authorities because of their extreme potency and growing role in overdose deaths across North America.
Ontario Launching New Peak Performance Electricity Program
Ontario is also preparing to launch a new energy initiative this summer as the province attempts to manage rising electricity demand over the coming decades.
The provincial government announced in April that it would expand its Energy Efficiency Framework through the introduction of a new Peak Performance program.
The initiative officially begins June 1, 2026.
How the Program Works
The program focuses on reducing electricity demand during peak summer usage periods.
Commercial and institutional buildings will be encouraged to temporarily reduce heating, ventilation, and air conditioning usage during periods of high strain on the electricity grid.
Participating facilities can agree to lower HVAC consumption for up to three hours on business days between June 1 and Sept. 30.
Financial Incentives for Businesses and Institutions
To encourage participation, Ontario is offering financial incentives to eligible facilities.
Participants who reduce electricity demand will receive $20 per kilowatt in incentives to help offset operational costs.
To qualify, facilities must either reduce at least 500 kilowatts of electricity usage or contribute toward an aggregated load reduction portfolio totaling at least 500 kilowatts.
Large office buildings, universities, shopping centres, and institutional facilities are expected to be among the biggest participants in the program.
Why Ontario Says the Program Is Necessary
The province says Ontario’s electricity demand could increase by as much as 90 per cent over the next 25 years.
Officials argue that maximizing current grid capacity is critical to avoiding major infrastructure strain and controlling long-term energy costs for consumers and businesses.
According to the province, large commercial buildings significantly contribute to summer peak demand, especially during periods when occupancy levels may already be lower.
Ontario estimates its broader Energy Efficiency Framework could reduce peak demand by 3,000 megawatts by 2036, an amount comparable to removing roughly three million homes from the grid.
One-Time GST/HST Credit Top-Up Arriving in June
Millions of eligible Canadians are also expected to receive additional federal financial support next month.
The federal government confirmed that a one-time GST/HST credit top-up payment will be issued on June 5, 2026.
The extra payment is part of the transition toward the new Canada Groceries and Essentials Benefit program, which is replacing the GST/HST credit system.
How Much the Top-Up Will Be
The government says the one-time top-up payment will equal 50 per cent of the GST/HST credit amount for the 2025-26 benefit year.
The additional payment is designed to provide short-term relief for Canadians facing higher living costs and grocery prices.
New Canada Groceries and Essentials Benefit Begins in July
Following the June top-up payment, quarterly Canada Groceries and Essentials Benefit payments will officially begin on July 3, 2026.
According to federal estimates, the new benefit could provide:
Families Could Receive Up to $1,890
A family of four may receive as much as $1,890 in total annual support through the new benefit structure in 2026.
Single Canadians Could Receive Up to $950
Single individuals may qualify for up to $950 annually under the updated system.
Who Qualifies for the June 5 Payment
To receive the one-time June top-up payment, eligible Canadians must have filed their 2024 tax return and qualified for the GST/HST credit in January 2026.
Future quarterly payments under the Canada Groceries and Essentials Benefit will then be calculated using information from 2025 tax returns.
Ontario Residents Facing a Busy Start to Summer
With June approaching, Ontario residents are preparing for a wide range of policy changes that touch nearly every aspect of daily life.
Tenants in Toronto apartment buildings could soon gain access to mandatory cooled spaces during extreme heat, while businesses and institutions may begin participating in electricity-saving programs aimed at protecting the province’s energy grid.
At the same time, Canadians struggling with affordability pressures are expected to receive additional federal support payments, while law enforcement agencies gain expanded powers to combat dangerous synthetic drugs entering the country.
As these changes roll out throughout June, both residents and businesses across Ontario will likely be watching closely to see how the new rules affect everyday life during the summer months.
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